HE 1523-0901
Star HE 1523-0901 |
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HE 1523-0901 is in this area | |||||||
AladinLite | |||||||
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 | ||||||
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 .