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Messier 107 was discovered by Pierre Mechain in 1782, but it was not added to the Messier Catalog until 1947. This 13 arcmin wide cluster contains about 100,000 stars, having a mass of about 180,000 solar masses.
Additional Information
Object
Name(s): Messier 107. M107. NGC 6171
Type: Globular Cluster
RA: 16h 32m 31s
Dec: -13º 03’ 06”
Constellation: Ophiuchus
Size (arcmin): 13×13 arcmin
Magnitude: 7.9
Distance: 21,000 ly
Image
Date: 2019-05-31 to 2019-06-05
Location: iTelescope.net, SSO near Coonabarabran, NSW Australia
Size (arcmin): 35×32 arcmin
Telescope: 20” f/6.8 Reflector
Camera: SBIG STX16803 (4096x4096pix)
Guiding: Astrodon MonsterMOAG off-axis guider
Total exposure: 6h 10m (L: 2h; RGB: 4h 10m)
Processing: CCDStack, Photoshop CC 2020