Messier 71
Sign in to saveGlobular cluster in the constellation Sagitta
Key facts
- Class
- X–XI
- Constellation
- Sagitta
- Right ascension
- 19 53 46.49
- Declination
- +18 ° 46 ′ 45.1 ″
- Distance
- 13.0 kly (4.0 kpc )
- Apparent dimensions v
- 7.2'
- Mass
- 1.7 × 10 M ☉
- Radius
- 13 ly
- Metallicity
- [ Fe/H ] = –0.78 dex
- Estimated age
- 9–10 Gyr
- Other designations
- M71, NGC 6838, Cr 409, GCl 115
via Wikipedia infobox
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Messier 71 (also known as M71, NGC 6838, or the Angelfish Cluster) is a globular cluster in the small northern constellation Sagitta. It was discovered by Philippe Loys de Chéseaux in 1745 and included by Charles Messier in his catalog of non-comet-like objects in 1780. It was also noted by Koehler at Dresden around 1775. Messier 71 is also known as NGC 6839, though this identification is very uncertain.