Messier 55. NGC 6809


Click on the image for a full resolution version



Messier 55, also known as M55 or NGC 6809, is a rather bright globular cluster in the constellation Sagittarius. This cluster is also known as the “Summer Rose star”. There is a good explanation about this cluster at the Messier-Objects page.


This image was taken in LRGB and is part of the project to have all messier objects taken with High Resolution telescopes.













Additional Information


Name(s): Messier 55. M55. NGC 6809

Type: Globular Cluster

RA:  19h 39m 59.7s

Dec: -30º 57’ 49.5”

Constellation: Sagittarius

Size (arcmin): 19 arcmin

Magnitude: +7.42

Distance: 17,600 ly


Date: 2019-07-11

Location:, SSO near Coonabarabran, NSW Australia

Size (arcmin): 35×35 arcmin

Telescope: 20” f/6.8 Reflector

Camera: SBIG STX16803 (4096x4096pix)

Guiding: Astrodon MonsterMOAG off-axis guider

Total exposure: 5 hours (L: 1h40m; RGB: 3h20m)

Processing: CCDStack, Photoshop CC 2019













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