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Messier 93 is a Southern open cluster which is about 100 million years old. It contains 80 confirmed and readily detectable stars, but hundreds of fainter stars in the surroundings may belong to it. Most of the brightest stars are blue giants that belong to the spectral class B9. Three red giants also stand out, two of them just above its center (in this image), while the third is located on the left side.
Additional Information
Object
Name(s): Messier 93. NGC 2447
Type: Open Cluster
RA: 07h 44m 29s
Dec: -23º 51’ 03”
Constellation: Puppis
Size (arcmin): 22×22 arcmin
Magnitude: +6.0
Distance: 3,600 light years
Image
Date: 2021-02-04 to 2021-03-04
Location: iTelescope.net, SSO near Coonabarabran, NSW Australia
Size (arcmin): 41×41 arcmin
Telescope: 17” f/6.8 Reflector
Camera: FLI PL16803 (4096x4096pix)
Guiding: N/A
Total exposure: 3.5 hours (L: 1h 35m; RGB: 1h 55m)
Processing: CCDStack, Photoshop CC 2021