HE 1523-0901
Red giant star in the constellation Libra / From Wikipedia, the free encyclopedia
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HE 1523-0901 is the designation given to a red giant star in the Milky Way galaxy approximately 9,900 light-years from Earth. It is thought to be a second generation, Population II, or metal-poor, star ([Fe/H] = −2.95). The star was found in the sample of bright metal-poor halo stars from the Hamburg/ESO Survey by Anna Frebel and collaborators. The group's research was published in the May 10, 2007 issue of The Astrophysical Journal.[5]
Quick Facts Constellation, Right ascension ...
Observation data Epoch J2000 Equinox J2000 | |
---|---|
Constellation | Libra |
Right ascension | 15h 26m 01.070s[1] |
Declination | −09° 11′ 38.89″[1] |
Apparent magnitude (V) | 11.129[2] |
Characteristics | |
Evolutionary stage | red giant branch[1] |
Spectral type | CEMP[3] |
B−V color index | +1.057[2] |
Astrometry | |
Radial velocity (Rv) | −162.48±0.34[1] km/s |
Proper motion (μ) | RA: −22.685 mas/yr[1] Dec.: −28.204 mas/yr[1] |
Parallax (π) | 0.3278 ± 0.0197 mas[1] |
Distance | 9,900 ± 600 ly (3,100 ± 200 pc) |
Details | |
Mass | 0.80±0.01[4] M☉ |
Radius | 27[1] R☉ |
Luminosity | 730[1] L☉ |
Surface gravity (log g) | 1.29±0.15[4] cgs |
Temperature | 4,742±100[4] K |
Metallicity [Fe/H] | −2.65±0.22[4] dex |
Age | 13.2[5] Gyr |
Other designations | |
Database references | |
SIMBAD | data |
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