Messier 18. NGC 6613

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Messier 18 is an open cluster located 4,900 light years away in the constellation Sagittarius. This is a young (about 30 million years old) and small cluster, with about 40-50 stars, most of them belonging to the B and A spectral classes. It can be found between NGC 6618 (M17) and M24 (Sagittarius Cloud) and is faint and easily overlooked.


Additional Information


Name(s): Messier 18. M18. NGC 6613

Type: Open Cluster

RA:  18h 19m 57s

Dec: -17º 05’ 55”

Constellation: Sagittarius

Size (arcmin): 10×10 arcmin

Magnitude: +7.5

Distance: 4,900 ly


Date: 2021-06-06

Location:, 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 hours (R:G:B 1:1:1 h)

Processing: CCDStack, Photoshop CC 2021

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