M55 (Globular cluster)

R/B-band color composite image from the Second Digitized Sky Survey (DSS2), measuring 12 arcminutes across.

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From Cambridge , M55 is not readily observable since it lies so far south that it will never rise more than 16° above the horizon.

Name M55
Object type Globular cluster
Other names
M55[2]
NGC 6809[3]
Mel 221[4]
Position
Right ascension:19h39m [3]
Declination:−30°57' [3]
Constellation:Sagittarius
Magnitude:6.30 (V) [4]
Distance:5.3 kpc
17.3 klyr [1]
Derived quantities
Absolute mag (V):-7.32
Events
17 Jul 2025  –  Messier 55 is well placed
17 Jul 2026  –  Messier 55 is well placed
17 Jul 2027  –  Messier 55 is well placed
16 Jul 2028  –  Messier 55 is well placed
17 Jul 2029  –  Messier 55 is well placed
17 Jul 2030  –  Messier 55 is well placed
17 Jul 2031  –  Messier 55 is well placed
16 Jul 2032  –  Messier 55 is well placed

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