M10; NGC 6254

M10, or NGC6254, is a seventh magnitude globular cluster in the constellation Ophiuchus, close to M12. About 16000 light-years away and about 70 light-years across, M10 on the sky has about half the diameter of the full moon. This picture was made from CCD images taken at the Burrell Schmidt telescope of the Warner and Swasey Observatory of the Case Western Reserve University, located on Kitt Peak in southwestern Arizona. The contributing images were 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