M20 (NGC, Trifid) and M21 (NGC 6531)
TheTrifid Nebula, M20 (upper left, NE) and the open star cluster M21 (lower right, SW), are close enough together on the sky that they both appear in this wide-field, 51 arc minute square picture taken with the Burrell Schmidt telescope of Case Western Reserve University's Warner and Swasey Observatory located on Kitt Peak, near Tucson, Arizona. The single set of BVR images was taken in June 1996, during the Research Experiences for Undergraduates (REU) program operated at the Kitt Peak National Observatory and supported by the National Science Foundation. Higher resolution images are separately available for M20 and M21.
Credit:REU program/NOIRLab/NSF/AURA
About the Image
Id: | noao-m21a20 |
Type: | Observation |
Release date: | June 30, 2020, 9:34 p.m. |
Size: | 1500 x 1500 px |
About the Object
Coordinates
Position (RA): | 18 3 4.23 |
Position (Dec): | -22° 44' 17.98" |
Field of view: | 50.76 x 50.76 arcminutes |
Orientation: | North is 177.4° right of vertical |
Colors & filters
Band | Tele-scope |
---|---|
Optical B | Burrell Schmidt Telescope |
Optical V | Burrell Schmidt Telescope |
Optical R | Burrell Schmidt Telescope |