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M-39 is an open cluster located in the constellation of Cygnus the Swan.. It was discovered by LeGentil in 1749 and cataloged by Charles Messier in 1764. It has an angular diameter of 29 arc minutes and lies about 1100 light years from Earth. This image was captured on September 3, 2026. It is a 1 hour 57 minute integration of 1 minute exposures through the AT-92 APO triplet refractor using the 2600MC Pro color CMOS camera binned 1X1 and cooled to -0 degrees. Captured in NINA, combined and processed in PixInsight.
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