NGC 6522
From Infogalactic: the planetary knowledge core
| NGC 6522 | |
|---|---|
| 300px
32 inch telescope
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| Observation data (J2000 epoch) | |
| Constellation | Sagittarius |
| Right ascension | 18h 3m 34.1s[1] |
| Declination | −30° 2′ 2.3″[1] |
| Distance | 25.1 kly (7.7 kpc)[2] |
| Physical characteristics | |
| Mass | 3.00×105[2] M☉ |
| Metallicity | –1.34[2] dex |
| Estimated age | 12.0 Gyr[3] |
NGC 6522 is a globular cluster in the constellation Sagittarius. It was discovered by William Herschel on June 24, 1784. It is centered in a region of the sky known as Baade's Window.[1]
NGC 6522 is possibly the oldest star cluster in the Milky Way,[4] with an age of more than 12 Gigayears.[5]
References
- ↑ 1.0 1.1 1.2 Lua error in package.lua at line 80: module 'strict' not found.
- ↑ 2.0 2.1 2.2 Lua error in package.lua at line 80: module 'strict' not found.
- ↑ Lua error in package.lua at line 80: module 'strict' not found.
- ↑ "VLT-FLAMES Analysis of 8 giants in the Bulge Metal-poor Globular Cluster NGC 6522: Oldest Cluster in the Galaxy?" by B. Barbuy et al., 2009
- ↑ "The universe's first stars were whirling dervishes", New Scientist by David Shiga, 30 April 2011, p. 20. "Imprints of fast-rotating massive stars in the Galactic Bulge" by Cristina Chiappini et al., Nature 472, pp. 454–457 (28 April 2011).
External links
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