This image of M-13 is the second image acquired at the new Land of Oz Observatory site in Lee's Summit, Missouri. It was taken on the evening of July 28, 2025, and is a 1 hour 32 minute integration of 90 second exposures through the Astro-Tech AT-92 92mm aperture f/5.5 APO refractor using the ZWO 2600MC Pro camera operating at 0 degrees and binned 1 X 1. Captured in N.I.N.A., guided by PHD2, stacked and calibrated using PixInsight. Post processed in PhotoShop.
M-13 is one of the brightest globular clusters, containing several hundred thousand stars. It lies at a distance of 22,000 light years from Earth and is over 160 light years in diameter. Also visible in this image is a small 12th magnitude spiral galaxy, NGC-6207, which lies at a distance of 40 million light years.