NGC 6401
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Globular cluster NGC 6401 |
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| Image taken by the Hubble Space Telescope | |
| AladinLite | |
| Constellation | Snake bearer |
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Position equinox : J2000.0 , epoch : J2000.0 |
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| Right ascension | 17 h 38 m 36.9 s |
| declination | -23 ° 54 ′ 32 ″ |
| Appearance | |
| Concentration class | VIII |
| Brightness (visual) | 7.4 mag |
| Angular expansion | 4.8 ' |
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Color excess E (BV) (redness) |
0.53 ± 0.15 |
| Physical data | |
| distance | approx. 39000 ly (approx. 12000 pc ) |
| Metallicity [Fe / H] | approx. −0.7 |
| history | |
| discovery | William Herschel |
| Discovery date | May 21, 1784 |
| Catalog names | |
| NGC 6401 • C 1735-238 • GCl 73 • ESO 520-SC11 • GC 4314 • HI 44 • h 1982 / h 3697 | |
NGC 6401 (also GCl 73 and ESO 520-SC11 ) is a galactic globular cluster in the constellation Snake Bearer , about 40,000 light years away .
It was discovered on May 21, 1784 by William Herschel .
literature
- B. Barbuy, S. Ortolani, E. Bica, S. Desidera: “The metal-rich bulge globular cluster NGC 6401”; Astronomy and Astrophysics Vol. 348, pp. 783-788 (1999)
Web links
- NGC 6401. SIMBAD, accessed July 28, 2016 .