HD 31134

HD 31134
Location of HD 31134 on the map (circled)
Observation data
Epoch J2000.0      Equinox J2000.0 (ICRS)
Constellation Camelopardalis
Right ascension 04h 56m 07.07238s[1]
Declination +52° 52′ 11.0544″[1]
Apparent magnitude (V) 5.74±0.01[2]
Characteristics
Evolutionary stage main sequence star[3]
Spectral type A2 Vs[4] or A1 Vp[5]
U−B color index +0.11[2]
B−V color index +0.09[2]
Astrometry
Radial velocity (Rv)−15.1±2.5[6] km/s
Proper motion (μ) RA: −3.418 mas/yr[1]
Dec.: +14.954 mas/yr[1]
Parallax (π)6.8897 ± 0.1144 mas[1]
Distance473 ± 8 ly
(145 ± 2 pc)
Absolute magnitude (MV)+0.19[7]
Details
Mass2.74±0.05[3] M☉
Radius4.38±0.22[8] R☉
Luminosity103+13
−11[3] L☉
Surface gravity (log g)3.85[9] cgs
Temperature8,690[9] K
Metallicity [Fe/H]−0.11[10] dex
Rotational velocity (v sin i)60±1[11] km/s
Age432[12] Myr
Other designations
AG+52°472, BD+52°898, GC 5988, HD 31134, HIP 22936, HR 1561, SAO 24919[13]
Database references
SIMBADdata

HD 31134, also designated as HR 1561, is a solitary star[14] located in the northern circumpolar constellation Camelopardalis, the giraffe. It is faintly visible to the naked eye as a white-hued star with an apparent magnitude of 5.74.[2] Gaia DR3 parallax measurements place it 473 light years away.[1] It appears to be approaching the Solar System with a heliocentric radial velocity of −15.1 km/s.[6] At its current distance, HD 31134's brightness is diminished by 0.35 magnitudes due to interstellar dust.[15] It has an absolute magnitude of +0.19.[7]

The object has a stellar classification of A2 Vs,[4] indicating that it is an A-type main-sequence star with sharp or narrow absorption lines due to slow rotation. Two sources remove the s prefix and instead list it as an ordinary dwarf star[16][17] while one lists it as a more evolved giant star.[18] Abt and Morell (1995) list it as a slightly hotter peculiar Ap star,[5] but it is now considered unlikely to be chemically peculiar.[19] It has 2.74 times the mass of the Sun and an enlarged radius of 4.38 R☉.[8] It radiates 103 times the luminosity of the Sun[3] from its photosphere at an effective temperature of 8,690 K.[9] HD 31134 is a rather evolved star, having completed 97.6% of its main sequence lifetime[3] at the age of 432 million years.[12] Consistent with its spectrum, it spins modestly with a projected rotational velocity of 60 km/s.[11]

  1. ^ a b c d e Cite error: The named reference GaiaDR3 was invoked but never defined (see the help page).
  2. ^ a b c d Cite error: The named reference Oja1991 was invoked but never defined (see the help page).
  3. ^ a b c d e Cite error: The named reference Zorec2012 was invoked but never defined (see the help page).
  4. ^ a b Cite error: The named reference Cowley1969 was invoked but never defined (see the help page).
  5. ^ a b Cite error: The named reference Abt1995 was invoked but never defined (see the help page).
  6. ^ a b Cite error: The named reference Gontcharov2006 was invoked but never defined (see the help page).
  7. ^ a b Cite error: The named reference Anderson2012 was invoked but never defined (see the help page).
  8. ^ a b Cite error: The named reference Kervella2004 was invoked but never defined (see the help page).
  9. ^ a b c Cite error: The named reference Phillip1980 was invoked but never defined (see the help page).
  10. ^ Cite error: The named reference Anders2019 was invoked but never defined (see the help page).
  11. ^ a b Cite error: The named reference Royer2002 was invoked but never defined (see the help page).
  12. ^ a b Cite error: The named reference Gontcharov2012 was invoked but never defined (see the help page).
  13. ^ Cite error: The named reference SIMBAD was invoked but never defined (see the help page).
  14. ^ Cite error: The named reference Eggleton2008 was invoked but never defined (see the help page).
  15. ^ Cite error: The named reference Gontcharov2017 was invoked but never defined (see the help page).
  16. ^ Cite error: The named reference Appenzeller1967 was invoked but never defined (see the help page).
  17. ^ Cite error: The named reference Cucchiaro1978 was invoked but never defined (see the help page).
  18. ^ Cite error: The named reference Palmer1968 was invoked but never defined (see the help page).
  19. ^ Cite error: The named reference Renson2009 was invoked but never defined (see the help page).