HD 31529

HD 31529
Observation data
Epoch J2000.0      Equinox J2000.0 (ICRS)
Constellation Caelum
Right ascension 04h 54m 54.81319s[1]
Declination −39° 37′ 42.9886″[1]
Apparent magnitude (V) 6.09±0.01[2]
Characteristics
Evolutionary stage red giant branch[1]
Spectral type K3 III[3]
B−V color index +1.42[4]
Astrometry
Radial velocity (Rv)28.4±0.4[5] km/s
Proper motion (μ) RA: −6.482 mas/yr[1]
Dec.: +22.102 mas/yr[1]
Parallax (π)3.4977 ± 0.0268 mas[1]
Distance932 ± 7 ly
(286 ± 2 pc)
Absolute magnitude (MV)−1.73[6]
Details
Mass4.81+0.11
−0.04[1] M☉
Radius54.06[7] R☉
Luminosity915[8] L☉
Surface gravity (log g)1.15[9] cgs
Temperature4,159±122[10] K
Metallicity [Fe/H]−0.12[11] dex
Rotational velocity (v sin i)2.1±1.3[12] km/s
Other designations
22 G. Caeli, CD−39°1691, CPD−39°536, FK5 2371, GC 6016, HD 31529, HIP 22847, HR 1584, SAO 195400
Database references
SIMBADdata

HD 31529, also known as HR 1584, is a solitary, orange hued star located in the southern constellation Caelum, the chisel. It has an apparent magnitude of 6.09,[2] making it faintly visible to the naked eye if viewed under ideal conditions. This object is located relatively far at a distance of 932 light years based on parallax measurements from Gaia DR3,[1] but is receding with a heliocentric radial velocity of 28.4 km/s.[5] Eggen (1989) lists it as a member of the old disk population.[11]

This is an evolved red giant star with a stellar classification of K3 III. It is currently on the red giant branch, generating energy by fusing hydrogen in a shell around its core. It has 4.8 times the mass of the Sun[1] and an enlarged radius of 54.06 R☉[7] due to its evolved state. It radiates 915 times the luminosity of the Sun[8] from its photosphere at an effective temperature of 4,159 K.[10] HD 31529 is slightly metal deficient (76% solar iron abundance)[11] and spins modestly with a projected rotational velocity of 2.1 km/s.[12]

  1. ^ a b c d e f g h Cite error: The named reference GaiaDR3 was invoked but never defined (see the help page).
  2. ^ a b Cite error: The named reference Tycho2000 was invoked but never defined (see the help page).
  3. ^ Cite error: The named reference Houk1982 was invoked but never defined (see the help page).
  4. ^ Cite error: The named reference Johnson1966 was invoked but never defined (see the help page).
  5. ^ a b Cite error: The named reference Gontcharov2006 was invoked but never defined (see the help page).
  6. ^ Cite error: The named reference Anderson2012 was invoked but never defined (see the help page).
  7. ^ a b Cite error: The named reference Kervella2021 was invoked but never defined (see the help page).
  8. ^ a b Cite error: The named reference McDonald2017 was invoked but never defined (see the help page).
  9. ^ Cite error: The named reference Anders2019 was invoked but never defined (see the help page).
  10. ^ a b Cite error: The named reference Stassun2019 was invoked but never defined (see the help page).
  11. ^ a b c Cite error: The named reference Eggen1989 was invoked but never defined (see the help page).
  12. ^ a b Cite error: The named reference DeMed2014 was invoked but never defined (see the help page).