Ephemeris for Kitt Peak (Observer's Calendar)
he astronomical calendars presented here were generated using a program called skycalendar written by John Thorstensen of Dartmouth College. The program, which can generate a calendar for any site, is available by anonymous FTP from iraf.noao.edu in the contrib directory -- see the skycal.readme file in that directory for more details.
The times of sunset, the end and beginning of astronomical twilight, and sunrise are given in MST. The rising and setting times take into account atmospheric refraction, the mean semidiameter of the Sun, and are corrected approximately for the elevation of Kitt Peak above the terrain which forms its horizon, assumed to be 900 m. The latter correction is approximate; it was determined empirically and amounts to about 5 minutes. If the moon rises or sets during the night, the rising or setting time is printed; around new moon, the tabulated rising occurs after the tabulated setting, even though the rising time is always printed first. The zenith distance used for moonrise and moonset is the same for sunrise and sunset. The last two columns give the topocentric celestial coordinates for midnight MST.
Since these tabular data have a wide page format they may be easier to view on a full-screen-wide viewer page.
- 2005 Observers' Calendar
- 2006 Observers' Calendar
- 2007 Observers' Calendar
- 2008 Observers' Calendar
- 2009 Observers' Calendar
- 2010 Observers' Calendar
- 2011 Observers' Calendar
- 2012 Observers' Calendar
- 2013 Observers' Calendar
- 2014 Observers' Calendar
- 2015 Observers' Calendar
- 2016 Observers' Calendar
- 2017 Observers' Calendar [PDF version]
- 2018 Observers' Calendar [PDF version]
- 2019 Observers' Calendar [PDF version]
- 2020 Observers' Calendar [PDF version]
- 2021 Observers' Calendar [PDF version]
Brian Casey maintains a Web page of Astronomy Tools that includes an interactive version of skycalendar and an associated program called skycalc, part of the same package from John Thorstensen. Skycalc allows one to compute many different bits of astronomical information.
NOIRLab-Tucson users will note that both skycalendar and skycalc are available on our main Sun servers. Simply type the program name to run it. Please refer to the Skycalc User's Manual.