The open cluster Messier 21, infrared photograph from the 2MASS Atlas. Field size is 22.0' x 25.0'. The image was created from data collected with the 2MASS telescopes in Arizona and Chile. False colors were created by mapping different IR wavelength bands to colors, with the warmest, shortest wavelengths to blue and the coolest, longest waves to red.
Open cluster M21 as photographed at the Burrell Schmidt telescope of Case
Western Reserve University's Warner and Swasey Observatory, located on Kitt
Peak near Tucson, Arizona, during the Research Experiences for Undergraduates
(REU) program. This is an approximately true-color composite created from
eleven images taken in July 1995 and June 1996 using BVR filters.
Image size is 28.8 arc minutes.
Credit: REU program/NOAO/AURA/NSF
Last Modification: November 19, 2002