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Messier 39 (NGC 7092) is a small open cluster mainly populated with stars showing a mass about our Sun’s. Being about 250 million years old, its 30-50 stars are still in the main sequence, burning hydrogen. In 2002, Gray and Corbally determined that five of M39’s stars were indeed “peculiar” (in stars, the term “peculiar” defines a star that has unusual metallicities, at least on their surface).
Additional Information
Object
Name(s): Messier 39. M39. NGC 7092
Type: Open Cluster
RA: 21h 31m 48s
Dec: +48º 26’ 00”
Constellation: Cygnus
Size (arcmin): 32×32 arcmin
Magnitude: +5.5
Distance: 900 ly
Image
Date: 2021-09-13
Location: iTelescope, New Mexico Skies, Mayhill, NM, USA
Size (arcmin): 43×30 arcmin
Telescope: 20” (51 cm) f/4.5 Reflector
Camera: FLI PL11002 (4008x2672pix)
Guiding: Astrodon MonsterMOAG off-axis guider
Total exposure: 1.5 hours (30 min each RGB)
Processing: CCDStack, Photoshop CC 2022