HE 1523-0901

HE 1523-0901

Artist's impression of HE 1523-0901
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]
Distance9,900 ± 600 ly
(3,100 ± 200 pc)
Details
Mass0.80±0.01[4] M☉
Radius27[1] R☉
Luminosity730[1] L☉
Surface gravity (log g)1.29±0.15[4] cgs
Temperature4,742±100[4] K
Metallicity [Fe/H]−2.65±0.22[4] dex
Age13.2[5] Gyr
Other designations
HE 1523-0901, TYC 5594-576-1, 2MASS J15260106-0911388
Database references
SIMBADdata

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]

  1. ^ a b c d e f g h Cite error: The named reference dr3 was invoked but never defined (see the help page).
  2. ^ a b Cite error: The named reference ubv was invoked but never defined (see the help page).
  3. ^ Cite error: The named reference placco2018 was invoked but never defined (see the help page).
  4. ^ a b c d Cite error: The named reference reggiani2022 was invoked but never defined (see the help page).
  5. ^ a b Cite error: The named reference frebel was invoked but never defined (see the help page).