HE 1523-0901
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Star HE 1523-0901 |
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| HE 1523-0901 is in this area | |||||||
| AladinLite | |||||||
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Observation dates equinox : J2000.0 , epoch : J2000.0 |
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| Constellation | Libra | ||||||
| Right ascension | 15 h 26 m 1.07 s | ||||||
| declination | -09 ° 11 ′ 38.9 ″ | ||||||
| Apparent brightness | 11.5 likes | ||||||
| Typing | |||||||
| B − V color index | (0.87) | ||||||
| R − I index | (0.61) | ||||||
| Astrometry | |||||||
| Radial velocity | (−162.38 ± 0.58) km / s | ||||||
| parallax | (0.28 ± 0.04) mas | ||||||
| distance | (11500 ± 2000) ly (3.500) pc |
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| Proper movement | |||||||
| Rec. Share: | (-22.71 ± 0.08) mas / a | ||||||
| Dec. portion: | (−28.43 ± 0.07) mas / a | ||||||
| Physical Properties | |||||||
| Dimensions | 0.8 M ☉ | ||||||
| Effective temperature | approx. 4600 K | ||||||
| Metallicity [Fe / H] | −2.95 | ||||||
| Age | 13.2 billion a | ||||||
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Other names and catalog entries |
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HE 1523-0901 is a star in the constellation Libra (Libra). With an estimated age of 13.2 billion years, it is one of the oldest known stars in the Milky Way . Its metallicity is very low with [Fe / H] ≈ −3, it belongs to population II .
literature
- Frebel et al. (2007): "Discovery of HE 1523-0901, a Strongly r-Process-enhanced Metal-poor Star with Detected Uranium"; The Astrophysical Journal 660 (2), pp. L117-L120. doi : 10.1086 / 518122
Web links
Individual evidence
- ↑ a b c d e f g TYC 5594-576-1. In: SIMBAD . Center de Données astronomiques de Strasbourg , accessed on October 26, 2019 .
- ↑ HE 1523-0901. solstation.com, October 22, 2012, accessed October 22, 2012 .