Messier 75
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Globular cluster Messier 75 |
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| Photo from the Hubble Space Telescope | |
| AladinLite | |
| Constellation | Sagittarius |
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Position equinox : J2000.0 , epoch : J2000.0 |
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| Right ascension | 20 h 06 m 04.8 s |
| declination | −21 ° 55 ′ 20.1 ″ |
| Appearance | |
| Concentration class | I. |
| Brightness (visual) | 9.18 likes |
| Brightness (B-band) | 10.03 mag |
| Angular expansion | 6.8 ' |
| Physical data | |
| Affiliation | Milky Way |
| Redshift | −0.000631 ± 0.000012 |
| Radial velocity | −198 ± 4 km / s |
| distance | 67.5 kLj (20.5 kpc ) |
| diameter | 67 ly |
| history | |
| discovery | Pierre Méchain |
| Discovery date | August 27, 1780 |
| Catalog names | |
| M 75 • NGC 6864 • C 2003-220 • GCl 116 • ESO 595-SC013 • | |
Messier 75 (also referred to as NGC 6864 ) is a 9.2 mag bright globular cluster with an angular extent of 6.8 'in the constellation Sagittarius . Viewed from Earth, it lies on the other side of our Milky Way and, at a distance of 67,500 light years, is one of the most distant galactic globular clusters and the most distant in the Messier catalog.
Individual evidence
- ↑ a b c d SIMBAD
- ↑ Harlow Shapley, Helen B. Sawyer: A Classification of Globular Clusters . In: Harvard College Observatory Bulletin . tape 849 , 1927, pp. 11-14 , bibcode : 1927BHarO.849 ... 11S .
- ↑ a b M75 at SEDS
- ↑ Seligman
