CTIO 2022 Ephemeris


Jan Feb Mar
Apr May Jun
Jul Aug Sep
Oct Nov Dec

 

2022 January

Calendar for Cerro Tololo, west longitude (h.m.s) =   4 43 16, latitude (d.m) = -30 09.9
Note that each line lists events of one night, spanning two calendar dates.  Rise/set times are given
in Chilean time (  4 hr W), for 2215 m above surroundings, DAYLIGHT time used, `*` shows night clocks are reset.
Moon coords. and illum. are for local midnight, even if moon is down.  Program: John Thorstensen, Dartmouth College.

  Date (eve/morn)      JDmid    LMSTmidn   ---------- Sun: ---------   LST twilight:  ------------- Moon: --------------
  (2022 at start)    (-2450000)            set  twi.end twi.beg rise    eve    morn    rise   set  %illum   RA      Dec

Sat Jan 01/Sun Jan 02  9581.6    5 03 42   20 56  22 24   5 10  6 38    3 28  10 15    6 10  20 10     1  18 10.1 -25 17

Sun Jan 02/Mon Jan 03  9582.6    5 07 38   20 56  22 25   5 11  6 39    3 32  10 19   .....  21 17     0  19 16.6 -25 13
Mon Jan 03/Tue Jan 04  9583.6    5 11 35   20 57  22 25   5 12  6 40    3 36  10 24   .....  22 16     3  20 21.4 -23 17
Tue Jan 04/Wed Jan 05  9584.6    5 15 31   20 57  22 25   5 13  6 40    3 40  10 29   .....  23 05     8  21 22.4 -19 48
Wed Jan 05/Thu Jan 06  9585.6    5 19 28   20 57  22 24   5 14  6 41    3 44  10 34   .....  23 47    15  22 18.7 -15 11
Thu Jan 06/Fri Jan 07  9586.6    5 23 25   20 57  22 24   5 15  6 42    3 48  10 39   .....   0 22    24  23 10.6 - 9 52
Fri Jan 07/Sat Jan 08  9587.6    5 27 21   20 57  22 24   5 16  6 43    3 51  10 44   .....   0 54    33  23 59.2 - 4 14
Sat Jan 08/Sun Jan 09  9588.6    5 31 18   20 57  22 24   5 17  6 44    3 55  10 49   .....   1 23    43   0 45.4   1 27

Sun Jan 09/Mon Jan 10  9589.6    5 35 14   20 57  22 24   5 18  6 45    3 59  10 54   .....   1 52    53   1 30.6   6 57
Mon Jan 10/Tue Jan 11  9590.6    5 39 11   20 57  22 24   5 19  6 45    4 03  10 59   .....   2 21    63   2 15.8  12 07
Tue Jan 11/Wed Jan 12  9591.6    5 43 07   20 57  22 23   5 20  6 46    4 06  11 04   .....   2 53    72   3 01.8  16 46
Wed Jan 12/Thu Jan 13  9592.6    5 47 04   20 57  22 23   5 21  6 47    4 10  11 09   .....   3 27    80   3 49.4  20 44
Thu Jan 13/Fri Jan 14  9593.6    5 51 00   20 57  22 23   5 22  6 48    4 13  11 14   .....   4 06    87   4 39.1  23 53
Fri Jan 14/Sat Jan 15  9594.6    5 54 57   20 56  22 22   5 23  6 49    4 17  11 19   18 20   4 49    93   5 30.9  26 01
Sat Jan 15/Sun Jan 16  9595.6    5 58 54   20 56  22 22   5 24  6 50    4 21  11 24   19 14   5 38    97   6 24.3  27 00

Sun Jan 16/Mon Jan 17  9596.6    6 02 50   20 56  22 21   5 25  6 51    4 24  11 29   20 05  .....    99   7 18.5  26 45
Mon Jan 17/Tue Jan 18  9597.6    6 06 47   20 56  22 21   5 26  6 52    4 27  11 34   20 52  .....   100   8 12.3  25 14
Tue Jan 18/Wed Jan 19  9598.6    6 10 43   20 56  22 20   5 28  6 52    4 31  11 39   21 35  .....    98   9 05.0  22 31
Wed Jan 19/Thu Jan 20  9599.6    6 14 40   20 55  22 20   5 29  6 53    4 34  11 44   22 13  .....    95   9 55.9  18 47
Thu Jan 20/Fri Jan 21  9600.6    6 18 36   20 55  22 19   5 30  6 54    4 38  11 49   22 47  .....    90  10 45.0  14 11
Fri Jan 21/Sat Jan 22  9601.6    6 22 33   20 55  22 19   5 31  6 55    4 41  11 54   23 19  .....    83  11 32.8   8 57
Sat Jan 22/Sun Jan 23  9602.6    6 26 29   20 54  22 18   5 32  6 56    4 44  12 00   23 50  .....    75  12 20.0   3 17

Sun Jan 23/Mon Jan 24  9603.6    6 30 26   20 54  22 17   5 33  6 57    4 48  12 05    0 21  .....    65  13 07.5 - 2 35
Mon Jan 24/Tue Jan 25  9604.6    6 34 23   20 53  22 17   5 35  6 58    4 51  12 10    0 53  .....    54  13 56.4 - 8 24
Tue Jan 25/Wed Jan 26  9605.6    6 38 19   20 53  22 16   5 36  6 59    4 54  12 15    1 28  .....    43  14 47.8 -13 53
Wed Jan 26/Thu Jan 27  9606.6    6 42 16   20 52  22 15   5 37  7 00    4 57  12 20    2 08  .....    32  15 42.8 -18 43
Thu Jan 27/Fri Jan 28  9607.6    6 46 12   20 52  22 15   5 38  7 01    5 00  12 25    2 55  .....    22  16 41.7 -22 31
Fri Jan 28/Sat Jan 29  9608.6    6 50 09   20 51  22 14   5 39  7 01    5 04  12 30    3 50  17 48    13  17 44.4 -24 53
Sat Jan 29/Sun Jan 30  9609.6    6 54 05   20 51  22 13   5 40  7 02    5 07  12 35    4 54  18 56     6  18 49.2 -25 31

Sun Jan 30/Mon Jan 31  9610.6    6 58 02   20 50  22 12   5 42  7 03    5 10  12 41    6 04  19 58     2  19 53.9 -24 19
Mon Jan 31/Tue Feb 01  9611.6    7 01 58   20 50  22 11   5 43  7 04    5 13  12 46   .....  20 51     0  20 56.2 -21 25


 


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Jan Feb Mar
Apr May Jun
Jul Aug Sep
Oct Nov Dec

 

2022 February

Calendar for Cerro Tololo, west longitude (h.m.s) =   4 43 16, latitude (d.m) = -30 09.9
Note that each line lists events of one night, spanning two calendar dates.  Rise/set times are given
in Chilean time (  4 hr W), for 2215 m above surroundings, DAYLIGHT time used, `*` shows night clocks are reset.
Moon coords. and illum. are for local midnight, even if moon is down.  Program: John Thorstensen, Dartmouth College.

  Date (eve/morn)      JDmid    LMSTmidn   ---------- Sun: ---------   LST twilight:  ------------- Moon: --------------
  (2022 at start)    (-2450000)            set  twi.end twi.beg rise    eve    morn    rise   set  %illum   RA      Dec

Tue Feb 01/Wed Feb 02  9612.6    7 05 55   20 49  22 10   5 44  7 05    5 16  12 51   .....  21 37     1  21 54.6 -17 10
Wed Feb 02/Thu Feb 03  9613.6    7 09 52   20 48  22 09   5 45  7 06    5 19  12 56   .....  22 16     5  22 48.9 -12 00
Thu Feb 03/Fri Feb 04  9614.6    7 13 48   20 48  22 08   5 46  7 07    5 22  13 01   .....  22 50    10  23 39.5 - 6 20
Fri Feb 04/Sat Feb 05  9615.6    7 17 45   20 47  22 07   5 47  7 08    5 25  13 06   .....  23 21    18   0 27.5 - 0 30
Sat Feb 05/Sun Feb 06  9616.6    7 21 41   20 46  22 06   5 48  7 09    5 28  13 11   .....  23 51    26   1 13.9   5 14

Sun Feb 06/Mon Feb 07  9617.6    7 25 38   20 46  22 05   5 50  7 09    5 31  13 16   .....   0 21    36   1 59.7  10 37
Mon Feb 07/Tue Feb 08  9618.6    7 29 34   20 45  22 04   5 51  7 10    5 34  13 21   .....   0 52    45   2 45.9  15 31
Tue Feb 08/Wed Feb 09  9619.6    7 33 31   20 44  22 03   5 52  7 11    5 37  13 26   .....   1 25    55   3 33.3  19 45
Wed Feb 09/Thu Feb 10  9620.6    7 37 27   20 43  22 02   5 53  7 12    5 39  13 31   .....   2 02    64   4 22.4  23 10
Thu Feb 10/Fri Feb 11  9621.6    7 41 24   20 42  22 01   5 54  7 13    5 42  13 36   .....   2 44    73   5 13.5  25 38
Fri Feb 11/Sat Feb 12  9622.6    7 45 21   20 42  22 00   5 55  7 14    5 45  13 41   .....   3 31    81   6 06.4  26 58
Sat Feb 12/Sun Feb 13  9623.6    7 49 17   20 41  21 59   5 56  7 15    5 48  13 46   17 59   4 22    88   7 00.4  27 05

Sun Feb 13/Mon Feb 14  9624.6    7 53 14   20 40  21 58   5 57  7 15    5 51  13 51   18 47   5 18    93   7 54.6  25 56
Mon Feb 14/Tue Feb 15  9625.6    7 57 10   20 39  21 57   5 58  7 16    5 54  13 56   19 32   6 16    97   8 48.0  23 32
Tue Feb 15/Wed Feb 16  9626.6    8 01 07   20 38  21 56   5 59  7 17    5 56  14 01   20 12  .....    99   9 40.1  20 00
Wed Feb 16/Thu Feb 17  9627.6    8 05 03   20 37  21 55   6 00  7 18    5 59  14 06   20 48  .....   100  10 30.6  15 31
Thu Feb 17/Fri Feb 18  9628.6    8 09 00   20 36  21 53   6 01  7 19    6 02  14 11   21 21  .....    98  11 19.6  10 17
Fri Feb 18/Sat Feb 19  9629.6    8 12 56   20 35  21 52   6 02  7 19    6 05  14 16   21 52  .....    93  12 07.8   4 33
Sat Feb 19/Sun Feb 20  9630.6    8 16 53   20 34  21 51   6 03  7 20    6 07  14 21   22 23  .....    87  12 56.0 - 1 26

Sun Feb 20/Mon Feb 21  9631.6    8 20 50   20 33  21 50   6 04  7 21    6 10  14 26   22 55  .....    79  13 45.0 - 7 24
Mon Feb 21/Tue Feb 22  9632.6    8 24 46   20 32  21 49   6 05  7 22    6 13  14 31   23 28  .....    69  14 36.0 -13 02
Tue Feb 22/Wed Feb 23  9633.6    8 28 43   20 31  21 47   6 06  7 23    6 16  14 36    0 06  .....    59  15 29.8 -18 01
Wed Feb 23/Thu Feb 24  9634.6    8 32 39   20 30  21 46   6 07  7 23    6 18  14 41    0 50  .....    47  16 27.0 -22 02
Thu Feb 24/Fri Feb 25  9635.6    8 36 36   20 29  21 45   6 08  7 24    6 21  14 46    1 40  .....    36  17 27.5 -24 42
Fri Feb 25/Sat Feb 26  9636.6    8 40 32   20 28  21 44   6 09  7 25    6 24  14 51    2 39  .....    26  18 30.1 -25 46
Sat Feb 26/Sun Feb 27  9637.6    8 44 29   20 27  21 42   6 10  7 26    6 26  14 56    3 45  17 46    16  19 33.2 -25 06

Sun Feb 27/Mon Feb 28  9638.6    8 48 25   20 26  21 41   6 11  7 26    6 29  15 00    4 54  18 41     9  20 34.8 -22 46
Mon Feb 28/Tue Mar 01  9639.6    8 52 22   20 25  21 40   6 12  7 27    6 32  15 05    6 03  19 29     3  21 33.2 -19 00


 


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Jan Feb Mar
Apr May Jun
Jul Aug Sep
Oct Nov Dec

 

2022 March

Calendar for Cerro Tololo, west longitude (h.m.s) =   4 43 16, latitude (d.m) = -30 09.9
Note that each line lists events of one night, spanning two calendar dates.  Rise/set times are given
in Chilean time (  4 hr W), for 2215 m above surroundings, DAYLIGHT time used, `*` shows night clocks are reset.
Moon coords. and illum. are for local midnight, even if moon is down.  Program: John Thorstensen, Dartmouth College.

  Date (eve/morn)      JDmid    LMSTmidn   ---------- Sun: ---------   LST twilight:  ------------- Moon: --------------
  (2022 at start)    (-2450000)            set  twi.end twi.beg rise    eve    morn    rise   set  %illum   RA      Dec

Tue Mar 01/Wed Mar 02  9640.6    8 56 19   20 24  21 39   6 13  7 28    6 34  15 10   .....  20 09     1  22 28.1 -14 09
Wed Mar 02/Thu Mar 03  9641.6    9 00 15   20 22  21 37   6 14  7 28    6 37  15 15   .....  20 45     0  23 19.6 - 8 37
Thu Mar 03/Fri Mar 04  9642.6    9 04 12   20 21  21 36   6 14  7 29    6 40  15 20   .....  21 17     2   0 08.5 - 2 45
Fri Mar 04/Sat Mar 05  9643.6    9 08 08   20 20  21 35   6 15  7 30    6 42  15 24   .....  21 48     7   0 55.6   3 07
Sat Mar 05/Sun Mar 06  9644.6    9 12 05   20 19  21 33   6 16  7 31    6 45  15 29   .....  22 18    12   1 42.0   8 46

Sun Mar 06/Mon Mar 07  9645.6    9 16 01   20 18  21 32   6 17  7 31    6 48  15 34   .....  22 49    20   2 28.5  13 57
Mon Mar 07/Tue Mar 08  9646.6    9 19 58   20 17  21 31   6 18  7 32    6 50  15 39   .....  23 22    28   3 15.9  18 30
Tue Mar 08/Wed Mar 09  9647.6    9 23 54   20 16  21 29   6 19  7 33    6 53  15 44   .....  23 58    37   4 04.7  22 16
Wed Mar 09/Thu Mar 10  9648.6    9 27 51   20 14  21 28   6 19  7 33    6 56  15 48   .....   0 38    46   4 55.3  25 04
Thu Mar 10/Fri Mar 11  9649.6    9 31 48   20 13  21 27   6 20  7 34    6 58  15 53   .....   1 22    56   5 47.5  26 48
Fri Mar 11/Sat Mar 12  9650.6    9 35 44   20 12  21 26   6 21  7 35    7 01  15 58   .....   2 12    65   6 40.9  27 20
Sat Mar 12/Sun Mar 13  9651.6    9 39 41   20 11  21 24   6 22  7 35    7 04  16 02   .....   3 06    74   7 34.8  26 36

Sun Mar 13/Mon Mar 14  9652.6    9 43 37   20 10  21 23   6 22  7 36    7 06  16 07   17 27   4 03    82   8 28.3  24 38
Mon Mar 14/Tue Mar 15  9653.6    9 47 34   20 08  21 22   6 23  7 37    7 09  16 12   18 08   5 02    89   9 20.8  21 28
Tue Mar 15/Wed Mar 16  9654.6    9 51 30   20 07  21 20   6 24  7 37    7 11  16 16   18 46   6 02    94  10 12.0  17 15
Wed Mar 16/Thu Mar 17  9655.6    9 55 27   20 06  21 19   6 25  7 38    7 14  16 21   19 20   7 02    98  11 01.9  12 10
Thu Mar 17/Fri Mar 18  9656.6    9 59 23   20 05  21 18   6 25  7 38    7 17  16 26   19 52  .....   100  11 51.1   6 26
Fri Mar 18/Sat Mar 19  9657.6   10 03 20   20 04  21 17   6 26  7 39    7 19  16 30   20 23  .....    99  12 40.3   0 18
Sat Mar 19/Sun Mar 20  9658.6   10 07 16   20 02  21 15   6 27  7 40    7 22  16 35   20 55  .....    96  13 30.3 - 5 55

Sun Mar 20/Mon Mar 21  9659.6   10 11 13   20 01  21 14   6 27  7 40    7 25  16 40   21 29  .....    90  14 22.1 -11 53
Mon Mar 21/Tue Mar 22  9660.6   10 15 10   20 00  21 13   6 28  7 41    7 27  16 44   22 05  .....    82  15 16.5 -17 14
Tue Mar 22/Wed Mar 23  9661.6   10 19 06   19 59  21 11   6 29  7 42    7 30  16 49   22 48  .....    73  16 14.0 -21 36
Wed Mar 23/Thu Mar 24  9662.6   10 23 03   19 57  21 10   6 29  7 42    7 33  16 54   23 36  .....    62  17 14.5 -24 38
Thu Mar 24/Fri Mar 25  9663.6   10 26 59   19 56  21 09   6 30  7 43    7 35  16 58    0 33  .....    51  18 16.9 -26 03
Fri Mar 25/Sat Mar 26  9664.6   10 30 56   19 55  21 08   6 31  7 43    7 38  17 03    1 35  .....    39  19 19.5 -25 45
Sat Mar 26/Sun Mar 27  9665.6   10 34 52   19 54  21 06   6 31  7 44    7 41  17 07    2 42  16 37    29  20 20.5 -23 47

Sun Mar 27/Mon Mar 28  9666.6   10 38 49   19 53  21 05   6 32  7 45    7 44  17 12    3 50  17 26    19  21 18.4 -20 23
Mon Mar 28/Tue Mar 29  9667.6   10 42 45   19 51  21 04   6 33  7 45    7 46  17 16    4 56  18 07    11  22 12.9 -15 52
Tue Mar 29/Wed Mar 30  9668.6   10 46 42   19 50  21 03   6 33  7 46    7 49  17 21    6 00  18 43     5  23 04.1 -10 35
Wed Mar 30/Thu Mar 31  9669.6   10 50 39   19 49  21 02   6 34  7 46    7 52  17 26    7 01  19 16     2  23 52.7 - 4 51
Thu Mar 31/Fri Apr 01  9670.6   10 54 35   19 48  21 00   6 35  7 47    7 54  17 30   .....  19 46     0   0 39.6   1 01


 


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Jan Feb Mar
Apr May Jun
Jul Aug Sep
Oct Nov Dec

 

2022 April

Calendar for Cerro Tololo, west longitude (h.m.s) =   4 43 16, latitude (d.m) = -30 09.9
Note that each line lists events of one night, spanning two calendar dates.  Rise/set times are given
in Chilean time (  4 hr W), for 2215 m above surroundings, DAYLIGHT time used, `*` shows night clocks are reset.
Moon coords. and illum. are for local midnight, even if moon is down.  Program: John Thorstensen, Dartmouth College.

  Date (eve/morn)      JDmid    LMSTmidn   ---------- Sun: ---------   LST twilight:  ------------- Moon: --------------
  (2022 at start)    (-2450000)            set  twi.end twi.beg rise    eve    morn    rise   set  %illum   RA      Dec

Fri Apr 01/Sat Apr 02  9671.6   10 58 32   19 47  20 59   6 35  7 48    7 57  17 35   .....  20 16     1   1 25.7   6 46
Sat Apr 02/Sun Apr 03* 9672.6   11 02 28   19 45  20 58   5 36  6 48    8 00  17 39   .....  20 47     4   2 12.0  12 10

Sun Apr 03/Mon Apr 04  9673.7   12 06 35   18 44  19 57   5 36  6 49    8 03  17 44   .....  20 19     8   3 01.5  17 08
Mon Apr 04/Tue Apr 05  9674.7   12 10 31   18 43  19 56   5 37  6 49    8 05  17 48   .....  20 53    14   3 49.9  21 11
Tue Apr 05/Wed Apr 06  9675.7   12 14 28   18 42  19 54   5 37  6 50    8 08  17 53   .....  21 32    22   4 39.9  24 18
Wed Apr 06/Thu Apr 07  9676.7   12 18 24   18 41  19 53   5 38  6 51    8 11  17 57   .....  22 15    30   5 31.4  26 22
Thu Apr 07/Fri Apr 08  9677.7   12 22 21   18 40  19 52   5 39  6 51    8 14  18 02   .....  23 03    39   6 24.1  27 16
Fri Apr 08/Sat Apr 09  9678.7   12 26 17   18 38  19 51   5 39  6 52    8 17  18 06   .....  23 55    48   7 17.2  26 57
Sat Apr 09/Sun Apr 10  9679.7   12 30 14   18 37  19 50   5 40  6 52    8 19  18 11   .....   0 50    58   8 10.1  25 23

Sun Apr 10/Mon Apr 11  9680.7   12 34 11   18 36  19 49   5 40  6 53    8 22  18 15   .....   1 48    67   9 02.1  22 39
Mon Apr 11/Tue Apr 12  9681.7   12 38 07   18 35  19 48   5 41  6 54    8 25  18 20   .....   2 46    76   9 52.9  18 51
Tue Apr 12/Wed Apr 13  9682.7   12 42 04   18 34  19 47   5 41  6 54    8 28  18 24   .....   3 46    84  10 42.6  14 05
Wed Apr 13/Thu Apr 14  9683.7   12 46 00   18 33  19 46   5 42  6 55    8 31  18 29   16 50   4 46    91  11 31.7   8 33
Thu Apr 14/Fri Apr 15  9684.7   12 49 57   18 32  19 45   5 43  6 55    8 34  18 33   17 21   5 48    96  12 20.9   2 29
Fri Apr 15/Sat Apr 16  9685.7   12 53 53   18 31  19 43   5 43  6 56    8 37  18 38   17 53   6 51    99  13 11.2 - 3 52
Sat Apr 16/Sun Apr 17  9686.7   12 57 50   18 30  19 42   5 44  6 57    8 40  18 42   18 26  .....   100  14 03.5 -10 10

Sun Apr 17/Mon Apr 18  9687.7   13 01 46   18 29  19 41   5 44  6 57    8 43  18 47   19 02  .....    97  14 58.7 -15 59
Mon Apr 18/Tue Apr 19  9688.7   13 05 43   18 27  19 40   5 45  6 58    8 45  18 51   19 43  .....    92  15 57.5 -20 53
Tue Apr 19/Wed Apr 20  9689.7   13 09 40   18 26  19 40   5 45  6 58    8 48  18 56   20 30  .....    85  16 59.7 -24 26
Wed Apr 20/Thu Apr 21  9690.7   13 13 36   18 25  19 39   5 46  6 59    8 51  19 00   21 26  .....    75  18 04.1 -26 19
Thu Apr 21/Fri Apr 22  9691.7   13 17 33   18 24  19 38   5 46  7 00    8 54  19 05   22 28  .....    64  19 08.6 -26 20
Fri Apr 22/Sat Apr 23  9692.7   13 21 29   18 23  19 37   5 47  7 00    8 57  19 09   23 34  .....    53  20 11.1 -24 36
Sat Apr 23/Sun Apr 24  9693.7   13 25 26   18 22  19 36   5 47  7 01    9 00  19 14    0 42  .....    42  21 10.1 -21 23

Sun Apr 24/Mon Apr 25  9694.7   13 29 22   18 21  19 35   5 48  7 02    9 04  19 18    1 48  .....    31  22 05.0 -17 00
Mon Apr 25/Tue Apr 26  9695.7   13 33 19   18 20  19 34   5 49  7 02    9 07  19 23    2 52  .....    22  22 56.1 -11 51
Tue Apr 26/Wed Apr 27  9696.7   13 37 15   18 20  19 33   5 49  7 03    9 10  19 27    3 52  16 18    14  23 44.3 - 6 15
Wed Apr 27/Thu Apr 28  9697.7   13 41 12   18 19  19 32   5 50  7 03    9 13  19 32    4 51  16 48     7   0 30.6 - 0 27
Thu Apr 28/Fri Apr 29  9698.7   13 45 09   18 18  19 32   5 50  7 04    9 16  19 36    5 49  17 18     3   1 16.0   5 16
Fri Apr 29/Sat Apr 30  9699.7   13 49 05   18 17  19 31   5 51  7 05    9 19  19 41    6 46  17 47     0   2 01.5  10 42
Sat Apr 30/Sun May 01  9700.7   13 53 02   18 16  19 30   5 51  7 05    9 22  19 45    7 43  18 18     0   2 47.7  15 40


 


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2018
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2021
2022
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Jan Feb Mar
Apr May Jun
Jul Aug Sep
Oct Nov Dec

 

2022 May

Calendar for Cerro Tololo, west longitude (h.m.s) =   4 43 16, latitude (d.m) = -30 09.9
Note that each line lists events of one night, spanning two calendar dates.  Rise/set times are given
in Chilean time (  4 hr W), for 2215 m above surroundings, DAYLIGHT time used, `*` shows night clocks are reset.
Moon coords. and illum. are for local midnight, even if moon is down.  Program: John Thorstensen, Dartmouth College.

  Date (eve/morn)      JDmid    LMSTmidn   ---------- Sun: ---------   LST twilight:  ------------- Moon: --------------
  (2022 at start)    (-2450000)            set  twi.end twi.beg rise    eve    morn    rise   set  %illum   RA      Dec


Sun May 01/Mon May 02  9701.7   13 56 58   18 15  19 29   5 52  7 06    9 25  19 50   .....  18 51     2   3 35.4  19 57
Mon May 02/Tue May 03  9702.7   14 00 55   18 14  19 28   5 52  7 07    9 29  19 54   .....  19 28     5   4 24.7  23 22
Tue May 03/Wed May 04  9703.7   14 04 51   18 13  19 28   5 53  7 07    9 32  19 59   .....  20 10    10   5 15.7  25 46
Wed May 04/Thu May 05  9704.7   14 08 48   18 13  19 27   5 53  7 08    9 35  20 03   .....  20 56    16   6 07.8  27 02
Thu May 05/Fri May 06  9705.7   14 12 44   18 12  19 26   5 54  7 08    9 38  20 07   .....  21 46    23   7 00.5  27 06
Fri May 06/Sat May 07  9706.7   14 16 41   18 11  19 26   5 54  7 09    9 42  20 12   .....  22 40    32   7 52.9  25 57
Sat May 07/Sun May 08  9707.7   14 20 38   18 10  19 25   5 55  7 10    9 45  20 16   .....  23 36    41   8 44.4  23 38

Sun May 08/Mon May 09  9708.7   14 24 34   18 10  19 24   5 55  7 10    9 48  20 21   .....   0 33    51   9 34.5  20 15
Mon May 09/Tue May 10  9709.7   14 28 31   18 09  19 24   5 56  7 11    9 52  20 25   .....   1 31    61  10 23.4  15 56
Tue May 10/Wed May 11  9710.7   14 32 27   18 08  19 23   5 56  7 11    9 55  20 30   .....   2 30    70  11 11.5  10 48
Wed May 11/Thu May 12  9711.7   14 36 24   18 07  19 23   5 57  7 12    9 58  20 34   .....   3 30    80  11 59.5   5 02
Thu May 12/Fri May 13  9712.7   14 40 20   18 07  19 22   5 57  7 13   10 02  20 39   .....   4 31    88  12 48.4 - 1 10
Fri May 13/Sat May 14  9713.7   14 44 17   18 06  19 22   5 58  7 13   10 05  20 43   16 21   5 35    94  13 39.3 - 7 30
Sat May 14/Sun May 15  9714.7   14 48 13   18 06  19 21   5 58  7 14   10 08  20 48   16 55   6 44    99  14 33.4 -13 38

Sun May 15/Mon May 16  9715.7   14 52 10   18 05  19 21   5 59  7 15   10 12  20 52   17 34   7 55   100  15 31.6 -19 06
Mon May 16/Tue May 17  9716.7   14 56 07   18 04  19 20   5 59  7 15   10 15  20 57   18 20  .....    98  16 34.2 -23 23
Tue May 17/Wed May 18  9717.7   15 00 03   18 04  19 20   6 00  7 16   10 19  21 01   19 13  .....    94  17 40.3 -26 02
Wed May 18/Thu May 19  9718.7   15 04 00   18 03  19 19   6 00  7 16   10 22  21 05   20 15  .....    87  18 47.7 -26 43
Thu May 19/Fri May 20  9719.7   15 07 56   18 03  19 19   6 01  7 17   10 26  21 10   21 22  .....    78  19 53.5 -25 28
Fri May 20/Sat May 21  9720.7   15 11 53   18 02  19 18   6 01  7 18   10 30  21 14   22 32  .....    67  20 55.6 -22 30
Sat May 21/Sun May 22  9721.7   15 15 49   18 02  19 18   6 02  7 18   10 33  21 19   23 40  .....    56  21 52.9 -18 16

Sun May 22/Mon May 23  9722.7   15 19 46   18 02  19 18   6 02  7 19   10 37  21 23    0 45  .....    45  22 45.7 -13 10
Mon May 23/Tue May 24  9723.7   15 23 42   18 01  19 17   6 03  7 19   10 40  21 28    1 47  .....    34  23 34.8 - 7 35
Tue May 24/Wed May 25  9724.7   15 27 39   18 01  19 17   6 03  7 20   10 44  21 32    2 46  .....    25   0 21.3 - 1 49
Wed May 25/Thu May 26  9725.7   15 31 36   18 00  19 17   6 04  7 20   10 48  21 36    3 43  .....    17   1 06.5   3 55
Thu May 26/Fri May 27  9726.7   15 35 32   18 00  19 17   6 04  7 21   10 51  21 41    4 40  15 50    10   1 51.5   9 23
Fri May 27/Sat May 28  9727.7   15 39 29   18 00  19 16   6 05  7 22   10 55  21 45    5 36  16 20     5   2 37.0  14 25
Sat May 28/Sun May 29  9728.7   15 43 25   17 59  19 16   6 05  7 22   10 59  21 50    6 33  16 52     2   3 23.8  18 50

Sun May 29/Mon May 30  9729.7   15 47 22   17 59  19 16   6 06  7 23   11 03  21 54    7 30  17 27     0   4 12.3  22 27
Mon May 30/Tue May 31  9730.7   15 51 18   17 59  19 16   6 06  7 23   11 06  21 58   .....  18 07     0   5 02.6  25 07
Tue May 31/Wed Jun 01  9731.7   15 55 15   17 59  19 16   6 07  7 24   11 10  22 03   .....  18 51     3   5 54.3  26 40


 


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Jan Feb Mar
Apr May Jun
Jul Aug Sep
Oct Nov Dec

 

2022 June

Calendar for Cerro Tololo, west longitude (h.m.s) =   4 43 16, latitude (d.m) = -30 09.9
Note that each line lists events of one night, spanning two calendar dates.  Rise/set times are given
in Chilean time (  4 hr W), for 2215 m above surroundings, DAYLIGHT time used, `*` shows night clocks are reset.
Moon coords. and illum. are for local midnight, even if moon is down.  Program: John Thorstensen, Dartmouth College.

  Date (eve/morn)      JDmid    LMSTmidn   ---------- Sun: ---------   LST twilight:  ------------- Moon: --------------
  (2022 at start)    (-2450000)            set  twi.end twi.beg rise    eve    morn    rise   set  %illum   RA      Dec

Wed Jun 01/Thu Jun 02  9732.7   15 59 11   17 58  19 16   6 07  7 24   11 14  22 07   .....  19 40     6   6 46.7  27 03
Thu Jun 02/Fri Jun 03  9733.7   16 03 08   17 58  19 15   6 07  7 25   11 18  22 12   .....  20 33    12   7 38.9  26 13
Fri Jun 03/Sat Jun 04  9734.7   16 07 05   17 58  19 15   6 08  7 25   11 22  22 16   .....  21 28    18   8 30.1  24 13
Sat Jun 04/Sun Jun 05  9735.7   16 11 01   17 58  19 15   6 08  7 26   11 26  22 20   .....  22 25    26   9 19.8  21 11

Sun Jun 05/Mon Jun 06  9736.7   16 14 58   17 58  19 15   6 09  7 26   11 29  22 25   .....  23 22    35  10 08.0  17 12
Mon Jun 06/Tue Jun 07  9737.7   16 18 54   17 58  19 15   6 09  7 27   11 33  22 29   .....   0 18    45  10 55.0  12 26
Tue Jun 07/Wed Jun 08  9738.7   16 22 51   17 58  19 15   6 09  7 27   11 37  22 33   .....   1 16    55  11 41.5   7 02
Wed Jun 08/Thu Jun 09  9739.7   16 26 47   17 58  19 15   6 10  7 27   11 41  22 38   .....   2 15    65  12 28.5   1 10
Thu Jun 09/Fri Jun 10  9740.7   16 30 44   17 58  19 15   6 10  7 28   11 45  22 42   .....   3 16    75  13 17.0 - 4 57
Fri Jun 10/Sat Jun 11  9741.7   16 34 40   17 58  19 15   6 11  7 28   11 49  22 46   .....   4 21    84  14 08.3 -11 04
Sat Jun 11/Sun Jun 12  9742.7   16 38 37   17 58  19 15   6 11  7 29   11 53  22 51   .....   5 30    92  15 03.7 -16 48

Sun Jun 12/Mon Jun 13  9743.7   16 42 34   17 58  19 15   6 11  7 29   11 57  22 55   16 07   6 42    97  16 04.1 -21 40
Mon Jun 13/Tue Jun 14  9744.7   16 46 30   17 58  19 15   6 12  7 29   12 01  22 59   16 56   7 56   100  17 09.3 -25 09
Tue Jun 14/Wed Jun 15  9745.7   16 50 27   17 58  19 16   6 12  7 30   12 05  23 03   17 55  .....    99  18 17.9 -26 45
Wed Jun 15/Thu Jun 16  9746.7   16 54 23   17 58  19 16   6 12  7 30   12 09  23 08   19 02  .....    95  19 26.9 -26 16
Thu Jun 16/Fri Jun 17  9747.7   16 58 20   17 58  19 16   6 12  7 30   12 13  23 12   20 14  .....    89  20 33.1 -23 49
Fri Jun 17/Sat Jun 18  9748.7   17 02 16   17 58  19 16   6 13  7 31   12 18  23 16   21 26  .....    80  21 34.5 -19 48
Sat Jun 18/Sun Jun 19  9749.7   17 06 13   17 58  19 16   6 13  7 31   12 22  23 20   22 34  .....    70  22 30.6 -14 44

Sun Jun 19/Mon Jun 20  9750.7   17 10 09   17 58  19 16   6 13  7 31   12 26  23 24   23 39  .....    60  23 22.3 - 9 04
Mon Jun 20/Tue Jun 21  9751.7   17 14 06   17 59  19 17   6 13  7 31   12 30  23 29    0 40  .....    49   0 10.5 - 3 10
Tue Jun 21/Wed Jun 22  9752.7   17 18 03   17 59  19 17   6 14  7 32   12 34  23 33    1 38  .....    38   0 56.7   2 40
Wed Jun 22/Thu Jun 23  9753.7   17 21 59   17 59  19 17   6 14  7 32   12 38  23 37    2 35  .....    29   1 42.0   8 15
Thu Jun 23/Fri Jun 24  9754.7   17 25 56   17 59  19 17   6 14  7 32   12 42  23 41    3 31  .....    20   2 27.4  13 24
Fri Jun 24/Sat Jun 25  9755.7   17 29 52   18 00  19 18   6 14  7 32   12 47  23 45    4 28  .....    13   3 13.8  17 56
Sat Jun 25/Sun Jun 26  9756.7   17 33 49   18 00  19 18   6 14  7 32   12 51  23 49    5 25  .....     8   4 01.8  21 42

Sun Jun 26/Mon Jun 27  9757.7   17 37 45   18 00  19 18   6 14  7 32   12 55  23 53    6 21  16 06     3   4 51.5  24 33
Mon Jun 27/Tue Jun 28  9758.7   17 41 42   18 01  19 18   6 15  7 32   12 59  23 57    7 16  16 49     1   5 42.7  26 20
Tue Jun 28/Wed Jun 29  9759.7   17 45 38   18 01  19 19   6 15  7 32   13 04   0 01    8 07  17 36     0   6 34.8  26 57
Wed Jun 29/Thu Jun 30  9760.7   17 49 35   18 01  19 19   6 15  7 32   13 08   0 05   .....  18 28     1   7 27.0  26 22
Thu Jun 30/Fri Jul 01  9761.7   17 53 32   18 02  19 19   6 15  7 32   13 12   0 09   .....  19 23     4   8 18.3  24 37


 


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2025

 


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Jan Feb Mar
Apr May Jun
Jul Aug Sep
Oct Nov Dec

 

2022 July

Calendar for Cerro Tololo, west longitude (h.m.s) =   4 43 16, latitude (d.m) = -30 09.9
Note that each line lists events of one night, spanning two calendar dates.  Rise/set times are given
in Chilean time (  4 hr W), for 2215 m above surroundings, DAYLIGHT time used, `*` shows night clocks are reset.
Moon coords. and illum. are for local midnight, even if moon is down.  Program: John Thorstensen, Dartmouth College.

  Date (eve/morn)      JDmid    LMSTmidn   ---------- Sun: ---------   LST twilight:  ------------- Moon: --------------
  (2022 at start)    (-2450000)            set  twi.end twi.beg rise    eve    morn    rise   set  %illum   RA      Dec

Fri Jul 01/Sat Jul 02  9762.7   17 57 28   18 02  19 20   6 15  7 32   13 16   0 13   .....  20 19     8   9 08.1  21 48
Sat Jul 02/Sun Jul 03  9763.7   18 01 25   18 02  19 20   6 15  7 32   13 21   0 17   .....  21 16    14   9 56.2  18 03

Sun Jul 03/Mon Jul 04  9764.7   18 05 21   18 03  19 20   6 15  7 32   13 25   0 21   .....  22 12    21  10 42.7  13 31
Mon Jul 04/Tue Jul 05  9765.7   18 09 18   18 03  19 21   6 15  7 32   13 29   0 25   .....  23 08    30  11 28.3   8 23
Tue Jul 05/Wed Jul 06  9766.7   18 13 14   18 04  19 21   6 15  7 32   13 34   0 29   .....   0 05    40  12 13.7   2 47
Wed Jul 06/Thu Jul 07  9767.7   18 17 11   18 04  19 22   6 15  7 32   13 38   0 33   .....   1 03    50  13 00.1 - 3 06
Thu Jul 07/Fri Jul 08  9768.7   18 21 07   18 05  19 22   6 15  7 32   13 42   0 37   .....   2 04    61  13 48.5 - 9 02
Fri Jul 08/Sat Jul 09  9769.7   18 25 04   18 05  19 22   6 15  7 32   13 47   0 41   .....   3 09    71  14 40.4 -14 44
Sat Jul 09/Sun Jul 10  9770.7   18 29 01   18 05  19 23   6 14  7 32   13 51   0 44   .....   4 18    81  15 36.8 -19 50

Sun Jul 10/Mon Jul 11  9771.7   18 32 57   18 06  19 23   6 14  7 31   13 55   0 48   .....   5 30    90  16 38.5 -23 52
Mon Jul 11/Tue Jul 12  9772.7   18 36 54   18 06  19 24   6 14  7 31   14 00   0 52   .....   6 42    96  17 45.0 -26 19
Tue Jul 12/Wed Jul 13  9773.7   18 40 50   18 07  19 24   6 14  7 31   14 04   0 56   16 37   7 49    99  18 54.2 -26 47
Wed Jul 13/Thu Jul 14  9774.7   18 44 47   18 07  19 24   6 14  7 31   14 08   1 00   17 48  .....   100  20 02.9 -25 09
Thu Jul 14/Fri Jul 15  9775.7   18 48 43   18 08  19 25   6 14  7 30   14 13   1 03   19 02  .....    97  21 08.0 -21 39
Fri Jul 15/Sat Jul 16  9776.7   18 52 40   18 08  19 25   6 13  7 30   14 17   1 07   20 15  .....    91  22 08.2 -16 47
Sat Jul 16/Sun Jul 17  9777.7   18 56 36   18 09  19 26   6 13  7 30   14 22   1 11   21 23  .....    83  23 03.5 -11 04

Sun Jul 17/Mon Jul 18  9778.7   19 00 33   18 10  19 26   6 13  7 29   14 26   1 14   22 28  .....    74  23 54.6 - 4 58
Mon Jul 18/Tue Jul 19  9779.7   19 04 30   18 10  19 27   6 12  7 29   14 30   1 18   23 29  .....    64   0 42.9   1 08
Tue Jul 19/Wed Jul 20  9780.7   19 08 26   18 11  19 27   6 12  7 28   14 35   1 22    0 28  .....    54   1 29.6   6 59
Wed Jul 20/Thu Jul 21  9781.7   19 12 23   18 11  19 27   6 12  7 28   14 39   1 25    1 25  .....    43   2 15.9  12 22
Thu Jul 21/Fri Jul 22  9782.7   19 16 19   18 12  19 28   6 11  7 27   14 44   1 29    2 22  .....    34   3 02.8  17 07
Fri Jul 22/Sat Jul 23  9783.7   19 20 16   18 12  19 28   6 11  7 27   14 48   1 32    3 19  .....    25   3 50.8  21 05
Sat Jul 23/Sun Jul 24  9784.7   19 24 12   18 13  19 29   6 11  7 26   14 52   1 36    4 16  .....    17   4 40.3  24 08

Sun Jul 24/Mon Jul 25  9785.7   19 28 09   18 13  19 29   6 10  7 26   14 57   1 39    5 11  .....    11   5 31.3  26 08
Mon Jul 25/Tue Jul 26  9786.7   19 32 05   18 14  19 30   6 10  7 25   15 01   1 43    6 04  .....     6   6 23.3  26 58
Tue Jul 26/Wed Jul 27  9787.7   19 36 02   18 15  19 30   6 09  7 25   15 06   1 46    6 52  16 23     2   7 15.6  26 37
Wed Jul 27/Thu Jul 28  9788.7   19 39 59   18 15  19 31   6 09  7 24   15 10   1 50    7 36  17 17     0   8 07.2  25 05
Thu Jul 28/Fri Jul 29  9789.7   19 43 55   18 16  19 31   6 08  7 24   15 14   1 53   .....  18 14     0   8 57.4  22 27
Fri Jul 29/Sat Jul 30  9790.7   19 47 52   18 16  19 32   6 08  7 23   15 19   1 56   .....  19 10     2   9 45.8  18 50
Sat Jul 30/Sun Jul 31  9791.7   19 51 48   18 17  19 32   6 07  7 22   15 23   2 00   .....  20 07     5  10 32.6  14 26

Sun Jul 31/Mon Aug 01  9792.7   19 55 45   18 17  19 33   6 06  7 21   15 28   2 03   .....  21 04    11  11 18.1   9 24


 


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2018
2019
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2021
2022
2023
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2025

 


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Jan Feb Mar
Apr May Jun
Jul Aug Sep
Oct Nov Dec

 

2022 August

Calendar for Cerro Tololo, west longitude (h.m.s) =   4 43 16, latitude (d.m) = -30 09.9
Note that each line lists events of one night, spanning two calendar dates.  Rise/set times are given
in Chilean time (  4 hr W), for 2215 m above surroundings, DAYLIGHT time used, `*` shows night clocks are reset.
Moon coords. and illum. are for local midnight, even if moon is down.  Program: John Thorstensen, Dartmouth College.

  Date (eve/morn)      JDmid    LMSTmidn   ---------- Sun: ---------   LST twilight:  ------------- Moon: --------------
  (2022 at start)    (-2450000)            set  twi.end twi.beg rise    eve    morn    rise   set  %illum   RA      Dec

Mon Aug 01/Tue Aug 02  9793.7   19 59 41   18 18  19 33   6 06  7 21   15 32   2 07   .....  22 00    17  12 03.0   3 55
Tue Aug 02/Wed Aug 03  9794.7   20 03 38   18 19  19 34   6 05  7 20   15 36   2 10   .....  22 57    26  12 48.3 - 1 50
Wed Aug 03/Thu Aug 04  9795.7   20 07 34   18 19  19 34   6 05  7 19   15 41   2 13   .....  23 56    35  13 35.0 - 7 39
Thu Aug 04/Fri Aug 05  9796.7   20 11 31   18 20  19 34   6 04  7 19   15 45   2 16   .....   0 58    46  14 24.2 -13 16
Fri Aug 05/Sat Aug 06  9797.7   20 15 28   18 20  19 35   6 03  7 18   15 50   2 20   .....   2 03    57  15 17.2 -18 25
Sat Aug 06/Sun Aug 07  9798.7   20 19 24   18 21  19 35   6 02  7 17   15 54   2 23   .....   3 12    68  16 14.9 -22 41

Sun Aug 07/Mon Aug 08  9799.7   20 23 21   18 21  19 36   6 02  7 16   15 59   2 26   .....   4 22    79  17 17.5 -25 40
Mon Aug 08/Tue Aug 09  9800.7   20 27 17   18 22  19 36   6 01  7 15   16 03   2 29   .....   5 29    88  18 23.9 -26 54
Tue Aug 09/Wed Aug 10  9801.7   20 31 14   18 23  19 37   6 00  7 14   16 07   2 32   .....   6 30    94  19 31.7 -26 09
Wed Aug 10/Thu Aug 11  9802.7   20 35 10   18 23  19 37   5 59  7 13   16 12   2 36   16 36   7 23    99  20 38.1 -23 26
Thu Aug 11/Fri Aug 12  9803.7   20 39 07   18 24  19 38   5 59  7 13   16 16   2 39   17 49  .....   100  21 40.7 -19 04
Fri Aug 12/Sat Aug 13  9804.7   20 43 03   18 24  19 38   5 58  7 12   16 21   2 42   19 01  .....    98  22 38.9 -13 32
Sat Aug 13/Sun Aug 14  9805.7   20 47 00   18 25  19 39   5 57  7 11   16 25   2 45   20 09  .....    93  23 32.9 - 7 22

Sun Aug 14/Mon Aug 15  9806.7   20 50 57   18 25  19 39   5 56  7 10   16 29   2 48   21 13  .....    87   0 23.6 - 1 00
Mon Aug 15/Tue Aug 16  9807.7   20 54 53   18 26  19 40   5 55  7 09   16 34   2 51   22 15  .....    78   1 12.4   5 12
Tue Aug 16/Wed Aug 17  9808.7   20 58 50   18 27  19 40   5 54  7 08   16 38   2 54   23 14  .....    69   2 00.2  10 57
Wed Aug 17/Thu Aug 18  9809.7   21 02 46   18 27  19 41   5 53  7 07   16 43   2 57    0 13  .....    59   2 48.2  16 04
Thu Aug 18/Fri Aug 19  9810.7   21 06 43   18 28  19 41   5 52  7 06   16 47   3 00    1 11  .....    49   3 36.9  20 22
Fri Aug 19/Sat Aug 20  9811.7   21 10 39   18 28  19 42   5 52  7 05   16 52   3 03    2 09  .....    40   4 26.9  23 44
Sat Aug 20/Sun Aug 21  9812.7   21 14 36   18 29  19 42   5 51  7 04   16 56   3 06    3 05  .....    31   5 18.1  26 01

Sun Aug 21/Mon Aug 22  9813.7   21 18 32   18 29  19 43   5 50  7 03   17 00   3 09    3 59  .....    23   6 10.3  27 08
Mon Aug 22/Tue Aug 23  9814.7   21 22 29   18 30  19 43   5 49  7 02   17 05   3 12    4 49  .....    15   7 02.8  27 02
Tue Aug 23/Wed Aug 24  9815.7   21 26 26   18 30  19 44   5 48  7 01   17 09   3 15    5 34  .....     9   7 54.8  25 44
Wed Aug 24/Thu Aug 25  9816.7   21 30 22   18 31  19 44   5 47  6 59   17 14   3 18    6 15  .....     5   8 45.5  23 18
Thu Aug 25/Fri Aug 26  9817.7   21 34 19   18 32  19 45   5 45  6 58   17 18   3 21    6 51  17 03     2   9 34.6  19 51
Fri Aug 26/Sat Aug 27  9818.7   21 38 15   18 32  19 45   5 44  6 57   17 23   3 24    7 24  18 01     0  10 21.9  15 33
Sat Aug 27/Sun Aug 28  9819.7   21 42 12   18 33  19 45   5 43  6 56   17 27   3 26   .....  18 58     1  11 07.9  10 34

Sun Aug 28/Mon Aug 29  9820.7   21 46 08   18 33  19 46   5 42  6 55   17 31   3 29   .....  19 55     3  11 53.2   5 06
Mon Aug 29/Tue Aug 30  9821.7   21 50 05   18 34  19 46   5 41  6 54   17 36   3 32   .....  20 52     8  12 38.4 - 0 40
Tue Aug 30/Wed Aug 31  9822.7   21 54 01   18 34  19 47   5 40  6 53   17 40   3 35   .....  21 51    14  13 24.6 - 6 30
Wed Aug 31/Thu Sep 01  9823.7   21 57 58   18 35  19 47   5 39  6 52   17 45   3 38   .....  22 52    22  14 12.8 -12 10


 


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2018
2019
2020
2021
2022
2023
2024
2025

 


Links to other months.

 


 


Jan Feb Mar
Apr May Jun
Jul Aug Sep
Oct Nov Dec

 

2022 September

Calendar for Cerro Tololo, west longitude (h.m.s) =   4 43 16, latitude (d.m) = -30 09.9
Note that each line lists events of one night, spanning two calendar dates.  Rise/set times are given
in Chilean time (  4 hr W), for 2215 m above surroundings, DAYLIGHT time used, `*` shows night clocks are reset.
Moon coords. and illum. are for local midnight, even if moon is down.  Program: John Thorstensen, Dartmouth College.

  Date (eve/morn)      JDmid    LMSTmidn   ---------- Sun: ---------   LST twilight:  ------------- Moon: --------------
  (2022 at start)    (-2450000)            set  twi.end twi.beg rise    eve    morn    rise   set  %illum   RA      Dec

Thu Sep 01/Fri Sep 02  9824.7   22 01 55   18 35  19 48   5 38  6 50   17 49   3 41   .....  23 55    32  15 04.0 -17 23
Fri Sep 02/Sat Sep 03  9825.7   22 05 51   18 36  19 48   5 37  6 49   17 54   3 43   .....   1 02    43  15 59.2 -21 49
Sat Sep 03/Sun Sep 04* 9826.7   22 09 48   18 36  19 49   6 35  7 48   17 58   3 46   .....   3 10    54  16 58.6 -25 04

Sun Sep 04/Mon Sep 05  9827.6   21 13 34   19 37  20 49   6 34  7 47   18 03   3 49   .....   4 16    65  17 59.7 -26 51
Mon Sep 05/Tue Sep 06  9828.6   21 17 31   19 37  20 50   6 33  7 46   18 07   3 52   .....   5 18    76  19 05.1 -26 49
Tue Sep 06/Wed Sep 07  9829.6   21 21 27   19 38  20 51   6 32  7 44   18 11   3 54   .....   6 13    85  20 10.3 -24 54
Wed Sep 07/Thu Sep 08  9830.6   21 25 24   19 38  20 51   6 31  7 43   18 16   3 57   .....   7 00    93  21 13.1 -21 14
Thu Sep 08/Fri Sep 09  9831.6   21 29 21   19 39  20 52   6 29  7 42   18 20   4 00   17 38  .....    98  22 12.2 -16 12
Fri Sep 09/Sat Sep 10  9832.6   21 33 17   19 40  20 52   6 28  7 41   18 25   4 03   18 48  .....   100  23 07.6 -10 15
Sat Sep 10/Sun Sep 11  9833.6   21 37 14   19 40  20 53   6 27  7 39   18 29   4 05   19 54  .....    99  23 59.8 - 3 51

Sun Sep 11/Mon Sep 12  9834.6   21 41 10   19 41  20 53   6 26  7 38   18 34   4 08   20 57  .....    96   0 49.9   2 35
Mon Sep 12/Tue Sep 13  9835.6   21 45 07   19 41  20 54   6 25  7 37   18 38   4 11   21 59  .....    91   1 38.9   8 43
Tue Sep 13/Wed Sep 14  9836.6   21 49 03   19 42  20 54   6 23  7 36   18 43   4 13   22 59  .....    83   2 27.8  14 17
Wed Sep 14/Thu Sep 15  9837.6   21 53 00   19 42  20 55   6 22  7 35   18 47   4 16   23 59  .....    75   3 17.2  19 03
Thu Sep 15/Fri Sep 16  9838.6   21 56 56   19 43  20 55   6 21  7 33   18 52   4 19    0 58  .....    66   4 07.8  22 53
Fri Sep 16/Sat Sep 17  9839.6   22 00 53   19 43  20 56   6 19  7 32   18 56   4 21    1 56  .....    57   4 59.5  25 37
Sat Sep 17/Sun Sep 18  9840.6   22 04 50   19 44  20 57   6 18  7 31   19 01   4 24    2 51  .....    47   5 52.1  27 09

Sun Sep 18/Mon Sep 19  9841.6   22 08 46   19 44  20 57   6 17  7 29   19 05   4 27    3 43  .....    38   6 45.0  27 28
Mon Sep 19/Tue Sep 20  9842.6   22 12 43   19 45  20 58   6 16  7 28   19 10   4 29    4 30  .....    29   7 37.4  26 33
Tue Sep 20/Wed Sep 21  9843.6   22 16 39   19 45  20 58   6 14  7 27   19 14   4 32    5 12  .....    21   8 28.6  24 28
Wed Sep 21/Thu Sep 22  9844.6   22 20 36   19 46  20 59   6 13  7 26   19 19   4 35    5 50  .....    14   9 18.2  21 19
Thu Sep 22/Fri Sep 23  9845.6   22 24 32   19 47  21 00   6 12  7 24   19 24   4 37    6 24  16 51     8  10 06.2  17 14
Fri Sep 23/Sat Sep 24  9846.6   22 28 29   19 47  21 00   6 10  7 23   19 28   4 40    6 55  17 48     4  10 52.7  12 24
Sat Sep 24/Sun Sep 25  9847.6   22 32 25   19 48  21 01   6 09  7 22   19 33   4 42   .....  18 46     1  11 38.4   6 59

Sun Sep 25/Mon Sep 26  9848.6   22 36 22   19 48  21 01   6 08  7 21   19 37   4 45   .....  19 44     0  12 24.1   1 11
Mon Sep 26/Tue Sep 27  9849.6   22 40 19   19 49  21 02   6 06  7 19   19 42   4 48   .....  20 43     2  13 10.5 - 4 47
Tue Sep 27/Wed Sep 28  9850.6   22 44 15   19 49  21 03   6 05  7 18   19 46   4 50   .....  21 44     5  13 58.7 -10 39
Wed Sep 28/Thu Sep 29  9851.6   22 48 12   19 50  21 03   6 04  7 17   19 51   4 53   .....  22 48    11  14 49.6 -16 07
Thu Sep 29/Fri Sep 30  9852.6   22 52 08   19 51  21 04   6 02  7 16   19 56   4 55   .....  23 55    19  15 44.0 -20 51
Fri Sep 30/Sat Oct 01  9853.6   22 56 05   19 51  21 05   6 01  7 14   20 00   4 58   .....   1 03    28  16 42.3 -24 28


 


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Jan Feb Mar
Apr May Jun
Jul Aug Sep
Oct Nov Dec

 

2022 October

Calendar for Cerro Tololo, west longitude (h.m.s) =   4 43 16, latitude (d.m) = -30 09.9
Note that each line lists events of one night, spanning two calendar dates.  Rise/set times are given
in Chilean time (  4 hr W), for 2215 m above surroundings, DAYLIGHT time used, `*` shows night clocks are reset.
Moon coords. and illum. are for local midnight, even if moon is down.  Program: John Thorstensen, Dartmouth College.

  Date (eve/morn)      JDmid    LMSTmidn   ---------- Sun: ---------   LST twilight:  ------------- Moon: --------------
  (2022 at start)    (-2450000)            set  twi.end twi.beg rise    eve    morn    rise   set  %illum   RA      Dec

Sat Oct 01/Sun Oct 02  9854.6   23 00 01   19 52  21 05   6 00  7 13   20 05   5 01   .....   2 10    39  17 44.1 -26 37

Sun Oct 02/Mon Oct 03  9855.6   23 03 58   19 52  21 06   5 58  7 12   20 10   5 03   .....   3 12    51  18 47.9 -27 03
Mon Oct 03/Tue Oct 04  9856.6   23 07 54   19 53  21 07   5 57  7 11   20 14   5 06   .....   4 08    62  19 51.6 -25 40
Tue Oct 04/Wed Oct 05  9857.6   23 11 51   19 53  21 08   5 56  7 10   20 19   5 08   .....   4 56    73  20 53.4 -22 34
Wed Oct 05/Thu Oct 06  9858.6   23 15 48   19 54  21 08   5 54  7 08   20 24   5 11   .....   5 37    83  21 51.9 -18 03
Thu Oct 06/Fri Oct 07  9859.6   23 19 44   19 55  21 09   5 53  7 07   20 28   5 14   .....   6 13    91  22 46.9 -12 30
Fri Oct 07/Sat Oct 08  9860.6   23 23 41   19 55  21 10   5 52  7 06   20 33   5 16   17 37   6 46    96  23 39.1 - 6 19
Sat Oct 08/Sun Oct 09  9861.6   23 27 37   19 56  21 11   5 50  7 05   20 38   5 19   18 40  .....    99   0 29.3   0 07

Sun Oct 09/Mon Oct 10  9862.6   23 31 34   19 57  21 11   5 49  7 04   20 42   5 21   19 42  .....   100   1 18.4   6 26
Mon Oct 10/Tue Oct 11  9863.6   23 35 30   19 57  21 12   5 48  7 02   20 47   5 24   20 43  .....    98   2 07.5  12 20
Tue Oct 11/Wed Oct 12  9864.6   23 39 27   19 58  21 13   5 46  7 01   20 52   5 27   21 44  .....    94   2 57.4  17 33
Wed Oct 12/Thu Oct 13  9865.6   23 43 23   19 59  21 14   5 45  7 00   20 57   5 29   22 44  .....    88   3 48.4  21 51
Thu Oct 13/Fri Oct 14  9866.6   23 47 20   19 59  21 15   5 44  6 59   21 02   5 32   23 44  .....    81   4 40.7  25 04
Fri Oct 14/Sat Oct 15  9867.6   23 51 17   20 00  21 15   5 42  6 58   21 06   5 35    0 41  .....    73   5 34.1  27 05
Sat Oct 15/Sun Oct 16  9868.6   23 55 13   20 01  21 16   5 41  6 57   21 11   5 37    1 35  .....    64   6 27.7  27 49

Sun Oct 16/Mon Oct 17  9869.6   23 59 10   20 01  21 17   5 40  6 56   21 16   5 40    2 24  .....    55   7 20.9  27 16
Mon Oct 17/Tue Oct 18  9870.6    0 03 06   20 02  21 18   5 39  6 55   21 21   5 43    3 08  .....    46   8 12.7  25 32
Tue Oct 18/Wed Oct 19  9871.6    0 07 03   20 03  21 19   5 37  6 54   21 26   5 45    3 47  .....    36   9 02.8  22 42
Wed Oct 19/Thu Oct 20  9872.6    0 10 59   20 03  21 20   5 36  6 52   21 30   5 48    4 22  .....    28   9 51.1  18 55
Thu Oct 20/Fri Oct 21  9873.6    0 14 56   20 04  21 21   5 35  6 51   21 35   5 51    4 54  .....    19  10 37.8  14 19
Fri Oct 21/Sat Oct 22  9874.6    0 18 52   20 05  21 22   5 33  6 50   21 40   5 53    5 24  .....    12  11 23.5   9 04
Sat Oct 22/Sun Oct 23  9875.6    0 22 49   20 05  21 23   5 32  6 49   21 45   5 56    5 53  17 31     6  12 09.1   3 21

Sun Oct 23/Mon Oct 24  9876.6    0 26 46   20 06  21 24   5 31  6 48   21 50   5 59    6 23  18 29     2  12 55.4 - 2 39
Mon Oct 24/Tue Oct 25  9877.6    0 30 42   20 07  21 25   5 30  6 47   21 55   6 01   .....  19 31     0  13 43.4 - 8 40
Tue Oct 25/Wed Oct 26  9878.6    0 34 39   20 08  21 26   5 29  6 46   22 00   6 04   .....  20 35     0  14 34.1 -14 24
Wed Oct 26/Thu Oct 27  9879.6    0 38 35   20 08  21 26   5 27  6 45   22 05   6 07   .....  21 42     3  15 28.5 -19 29
Thu Oct 27/Fri Oct 28  9880.6    0 42 32   20 09  21 27   5 26  6 45   22 10   6 10   .....  22 52     9  16 26.8 -23 32
Fri Oct 28/Sat Oct 29  9881.6    0 46 28   20 10  21 28   5 25  6 44   22 15   6 13   .....   0 01    16  17 28.8 -26 09
Sat Oct 29/Sun Oct 30  9882.6    0 50 25   20 11  21 29   5 24  6 43   22 20   6 15   .....   1 07    26  18 32.8 -27 02

Sun Oct 30/Mon Oct 31  9883.6    0 54 21   20 12  21 31   5 23  6 42   22 24   6 18   .....   2 05    36  19 36.8 -26 04
Mon Oct 31/Tue Nov 01  9884.6    0 58 18   20 12  21 32   5 22  6 41   22 29   6 21   .....   2 55    48  20 38.7 -23 22


 


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2018
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2021
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Jan Feb Mar
Apr May Jun
Jul Aug Sep
Oct Nov Dec

 

2022 November

Calendar for Cerro Tololo, west longitude (h.m.s) =   4 43 16, latitude (d.m) = -30 09.9
Note that each line lists events of one night, spanning two calendar dates.  Rise/set times are given
in Chilean time (  4 hr W), for 2215 m above surroundings, DAYLIGHT time used, `*` shows night clocks are reset.
Moon coords. and illum. are for local midnight, even if moon is down.  Program: John Thorstensen, Dartmouth College.

  Date (eve/morn)      JDmid    LMSTmidn   ---------- Sun: ---------   LST twilight:  ------------- Moon: --------------
  (2022 at start)    (-2450000)            set  twi.end twi.beg rise    eve    morn    rise   set  %illum   RA      Dec

Tue Nov 01/Wed Nov 02  9885.6    1 02 15   20 13  21 33   5 21  6 40   22 34   6 24   .....   3 38    59  21 37.0 -19 14
Wed Nov 02/Thu Nov 03  9886.6    1 06 11   20 14  21 34   5 20  6 39   22 39   6 27   .....   4 14    70  22 31.7 -14 01
Thu Nov 03/Fri Nov 04  9887.6    1 10 08   20 15  21 35   5 19  6 39   22 44   6 30   .....   4 47    80  23 23.3 - 8 07
Fri Nov 04/Sat Nov 05  9888.6    1 14 04   20 16  21 36   5 18  6 38   22 49   6 32   .....   5 18    88   0 12.7 - 1 52
Sat Nov 05/Sun Nov 06  9889.6    1 18 01   20 16  21 37   5 17  6 37   22 54   6 35   17 30   5 48    94   1 01.0   4 24

Sun Nov 06/Mon Nov 07  9890.6    1 21 57   20 17  21 38   5 16  6 36   23 00   6 38   18 30   6 19    98   1 49.3  10 24
Mon Nov 07/Tue Nov 08  9891.6    1 25 54   20 18  21 39   5 15  6 36   23 05   6 41   19 30  .....   100   2 38.4  15 52
Tue Nov 08/Wed Nov 09  9892.6    1 29 50   20 19  21 40   5 14  6 35   23 10   6 44   20 30  .....    99   3 29.0  20 33
Wed Nov 09/Thu Nov 10  9893.6    1 33 47   20 20  21 41   5 13  6 34   23 15   6 47   21 30  .....    97   4 21.2  24 13
Thu Nov 10/Fri Nov 11  9894.6    1 37 44   20 21  21 42   5 12  6 34   23 20   6 50   22 29  .....    93   5 14.9  26 42
Fri Nov 11/Sat Nov 12  9895.6    1 41 40   20 21  21 43   5 11  6 33   23 25   6 53   23 25  .....    87   6 09.2  27 54
Sat Nov 12/Sun Nov 13  9896.6    1 45 37   20 22  21 45   5 10  6 32   23 30   6 57    0 17  .....    80   7 03.2  27 47

Sun Nov 13/Mon Nov 14  9897.6    1 49 33   20 23  21 46   5 09  6 32   23 35   7 00    1 03  .....    72   7 56.0  26 25
Mon Nov 14/Tue Nov 15  9898.6    1 53 30   20 24  21 47   5 08  6 31   23 40   7 03    1 44  .....    63   8 46.8  23 55
Tue Nov 15/Wed Nov 16  9899.6    1 57 26   20 25  21 48   5 08  6 31   23 45   7 06    2 20  .....    54   9 35.4  20 26
Wed Nov 16/Thu Nov 17  9900.6    2 01 23   20 26  21 49   5 07  6 30   23 50   7 09    2 53  .....    44  10 22.2  16 08
Thu Nov 17/Fri Nov 18  9901.6    2 05 19   20 27  21 50   5 06  6 30   23 55   7 12    3 23  .....    35  11 07.6  11 09
Fri Nov 18/Sat Nov 19  9902.6    2 09 16   20 28  21 51   5 05  6 29    0 00   7 16    3 52  .....    26  11 52.5   5 39
Sat Nov 19/Sun Nov 20  9903.6    2 13 13   20 28  21 52   5 05  6 29    0 05   7 19    4 21  .....    17  12 37.9 - 0 11

Sun Nov 20/Mon Nov 21  9904.6    2 17 09   20 29  21 54   5 04  6 29    0 10   7 22    4 51  .....    10  13 24.7 - 6 11
Mon Nov 21/Tue Nov 22  9905.6    2 21 06   20 30  21 55   5 04  6 28    0 15   7 26    5 24  18 15     4  14 14.3 -12 03
Tue Nov 22/Wed Nov 23  9906.6    2 25 02   20 31  21 56   5 03  6 28    0 21   7 29    6 02  19 21     1  15 07.6 -17 29
Wed Nov 23/Thu Nov 24  9907.6    2 28 59   20 32  21 57   5 02  6 28    0 26   7 32   .....  20 31     0  16 05.3 -22 02
Thu Nov 24/Fri Nov 25  9908.6    2 32 55   20 33  21 58   5 02  6 27    0 31   7 36   .....  21 43     2  17 07.4 -25 15
Fri Nov 25/Sat Nov 26  9909.6    2 36 52   20 34  21 59   5 01  6 27    0 36   7 39   .....  22 53     6  18 12.6 -26 45
Sat Nov 26/Sun Nov 27  9910.6    2 40 48   20 34  22 00   5 01  6 27    0 41   7 43   .....  23 57    13  19 18.5 -26 19

Sun Nov 27/Mon Nov 28  9911.6    2 44 45   20 35  22 01   5 01  6 27    0 46   7 46   .....   0 52    22  20 22.5 -24 01
Mon Nov 28/Tue Nov 29  9912.6    2 48 42   20 36  22 02   5 00  6 27    0 51   7 50   .....   1 38    33  21 22.7 -20 09
Tue Nov 29/Wed Nov 30  9913.6    2 52 38   20 37  22 03   5 00  6 26    0 56   7 53   .....   2 16    44  22 18.6 -15 09
Wed Nov 30/Thu Dec 01  9914.6    2 56 35   20 38  22 04   5 00  6 26    1 01   7 57   .....   2 50    55  23 10.7 - 9 24


 


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Jan Feb Mar
Apr May Jun
Jul Aug Sep
Oct Nov Dec

 

2022 December

Calendar for Cerro Tololo, west longitude (h.m.s) =   4 43 16, latitude (d.m) = -30 09.9
Note that each line lists events of one night, spanning two calendar dates.  Rise/set times are given
in Chilean time (  4 hr W), for 2215 m above surroundings, DAYLIGHT time used, `*` shows night clocks are reset.
Moon coords. and illum. are for local midnight, even if moon is down.  Program: John Thorstensen, Dartmouth College.

  Date (eve/morn)      JDmid    LMSTmidn   ---------- Sun: ---------   LST twilight:  ------------- Moon: --------------
  (2022 at start)    (-2450000)            set  twi.end twi.beg rise    eve    morn    rise   set  %illum   RA      Dec

Thu Dec 01/Fri Dec 02  9915.6    3 00 31   20 39  22 05   4 59  6 26    1 06   8 01   .....   3 21    66   0 00.0 - 3 17
Fri Dec 02/Sat Dec 03  9916.6    3 04 28   20 39  22 06   4 59  6 26    1 11   8 04   .....   3 51    76   0 47.8   2 55
Sat Dec 03/Sun Dec 04  9917.6    3 08 24   20 40  22 07   4 59  6 26    1 16   8 08   .....   4 20    84   1 35.1   8 54

Sun Dec 04/Mon Dec 05  9918.6    3 12 21   20 41  22 08   4 59  6 26    1 21   8 12   .....   4 52    91   2 23.1  14 26
Mon Dec 05/Tue Dec 06  9919.6    3 16 17   20 42  22 09   4 59  6 26    1 25   8 16   18 21   5 26    96   3 12.5  19 18
Tue Dec 06/Wed Dec 07  9920.6    3 20 14   20 43  22 10   4 59  6 26    1 30   8 20   19 20   6 04    99   4 03.8  23 16
Wed Dec 07/Thu Dec 08  9921.6    3 24 11   20 43  22 11   4 59  6 27    1 35   8 24   20 19  .....   100   4 56.9  26 08
Thu Dec 08/Fri Dec 09  9922.6    3 28 07   20 44  22 12   4 59  6 27    1 40   8 28   21 16  .....    99   5 51.2  27 45
Fri Dec 09/Sat Dec 10  9923.6    3 32 04   20 45  22 13   4 59  6 27    1 45   8 32   22 10  .....    96   6 45.8  28 03
Sat Dec 10/Sun Dec 11  9924.6    3 36 00   20 46  22 14   4 59  6 27    1 50   8 36   22 58  .....    92   7 39.5  27 03

Sun Dec 11/Mon Dec 12  9925.6    3 39 57   20 46  22 15   4 59  6 27    1 54   8 40   23 41  .....    86   8 31.2  24 51
Mon Dec 12/Tue Dec 13  9926.6    3 43 53   20 47  22 15   4 59  6 28    1 59   8 44    0 19  .....    79   9 20.7  21 38
Tue Dec 13/Wed Dec 14  9927.6    3 47 50   20 48  22 16   4 59  6 28    2 04   8 48    0 52  .....    71  10 07.8  17 34
Wed Dec 14/Thu Dec 15  9928.6    3 51 46   20 48  22 17   4 59  6 28    2 08   8 52    1 22  .....    62  10 53.1  12 49
Thu Dec 15/Fri Dec 16  9929.6    3 55 43   20 49  22 18   5 00  6 29    2 13   8 56    1 51  .....    52  11 37.4   7 33
Fri Dec 16/Sat Dec 17  9930.6    3 59 40   20 49  22 18   5 00  6 29    2 18   9 00    2 19  .....    42  12 21.6   1 56
Sat Dec 17/Sun Dec 18  9931.6    4 03 36   20 50  22 19   5 00  6 29    2 22   9 05    2 47  .....    32  13 06.7 - 3 54

Sun Dec 18/Mon Dec 19  9932.6    4 07 33   20 51  22 20   5 01  6 30    2 27   9 09    3 18  .....    23  13 54.1 - 9 42
Mon Dec 19/Tue Dec 20  9933.6    4 11 29   20 51  22 20   5 01  6 30    2 31   9 13    3 53  .....    14  14 44.8 -15 14
Tue Dec 20/Wed Dec 21  9934.6    4 15 26   20 52  22 21   5 02  6 31    2 36   9 18    4 34  18 06     7  15 40.1 -20 08
Wed Dec 21/Thu Dec 22  9935.6    4 19 22   20 52  22 21   5 02  6 31    2 40   9 22    5 24  19 17     3  16 40.4 -23 56
Thu Dec 22/Fri Dec 23  9936.6    4 23 19   20 53  22 22   5 03  6 32    2 45   9 27    6 23  20 29     0  17 45.1 -26 11
Fri Dec 23/Sat Dec 24  9937.6    4 27 15   20 53  22 22   5 03  6 32    2 49   9 31   .....  21 38     1  18 52.2 -26 31
Sat Dec 24/Sun Dec 25  9938.6    4 31 12   20 54  22 23   5 04  6 33    2 53   9 36   .....  22 39     4  19 58.8 -24 50

Sun Dec 25/Mon Dec 26  9939.6    4 35 09   20 54  22 23   5 04  6 33    2 58   9 40   .....  23 31    10  21 02.2 -21 22
Mon Dec 26/Tue Dec 27  9940.6    4 39 05   20 54  22 23   5 05  6 34    3 02   9 45   .....   0 14    19  22 01.2 -16 32
Tue Dec 27/Wed Dec 28  9941.6    4 43 02   20 55  22 24   5 06  6 35    3 06   9 50   .....   0 50    29  22 55.7 -10 48
Wed Dec 28/Thu Dec 29  9942.6    4 46 58   20 55  22 24   5 07  6 35    3 10   9 54   .....   1 23    39  23 46.7 - 4 38
Thu Dec 29/Fri Dec 30  9943.6    4 50 55   20 55  22 24   5 07  6 36    3 15   9 59   .....   1 53    50   0 35.3   1 37
Fri Dec 30/Sat Dec 31  9944.6    4 54 51   20 56  22 24   5 08  6 37    3 19  10 04   .....   2 23    61   1 22.8   7 41
Sat Dec 31/Sun Jan 01  9945.6    4 58 48   20 56  22 24   5 09  6 37    3 23  10 09   .....   2 54    71   2 10.4  13 19