Messier 70
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Globular cluster Messier 70 |
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| Hubble Space Telescope image of the globular cluster Messier 70 | |
| AladinLite | |
| Constellation | Sagittarius |
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Position equinox : J2000.0 , epoch : J2000.0 |
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| Right ascension | 18 h 43 m 12.64 s |
| declination | −32 ° 17 ′ 30.8 ″ |
| Appearance | |
| Concentration class | V |
| Brightness (visual) | 9.06 likes |
| Brightness (B-band) | 9.76 mag |
| Angular expansion | 7.8 ' |
| Physical data | |
| Redshift | (730 ± 4) · 10 −6 |
| Radial velocity | (218.7 ± 1.2) km / s |
| distance | 29.3 kLj (9 kpc ) |
| diameter | 68 ly |
| history | |
| discovery | Charles Messier |
| Discovery date | August 31, 1780 |
| Catalog names | |
| M 70 • NGC 6681 • C 1840-323 • GCl 101 • | |
Messier 70 (also known as NGC 6681 ) is a 9.06 mag bright globular cluster with an area of 7.8 'in the constellation Sagittarius . M70 is not easily observed in Central Europe because of its southern position.
Web links
Individual evidence
- ↑ a b c d e 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 .
- ↑ VizieR Catalog VII / 118 NGC 6681
- ↑ https://cseligman.com/text/atlas/ngc66a.htm#6681
