Xi Aurigae

Xi Aurigae
Observation data
Epoch J2000.0      Equinox J2000.0 (ICRS)
Constellation Auriga
Right ascension 05h 54m 50.76694s[1]
Declination +55° 42′ 25.0802″[1]
Apparent magnitude (V) +5.00[2]
Characteristics
Spectral type A2 Va[3]
U−B color index +0.12[2]
B−V color index +0.05[2]
Astrometry
Radial velocity (Rv)−13.3±2.4[4] km/s
Proper motion (μ) RA: −7.049[1] mas/yr
Dec.: +12.959[1] mas/yr
Parallax (π)13.3702 ± 0.1670 mas[1]
Distance244 ± 3 ly
(74.8 ± 0.9 pc)
Absolute magnitude (MV)+0.64[5]
Details[6]
Mass1.96 M☉
Radius1.1[7] R☉
Luminosity49.5[5] L☉
Surface gravity (log g)3.88 cgs
Temperature9,152±311 K
Metallicity [Fe/H]−0.36±0.04[5] dex
Rotational velocity (v sin i)62 km/s
Age174 Myr
Other designations
ξ Ari, 30 Aurigae, BD+55° 1027, FK5 1157, HD 39283, HIP 27949, HR 2029, SAO 25450[8]
Database references
SIMBADdata

Xi Aurigae, Latinized from ξ Aurigae, is the Bayer designation for a single,[9] white-hued star in the northern constellation of Auriga. This star was once considered part of the constellation of Camelopardalis and held the Flamsteed designation 32 Camelopardalis.[10] It is visible to the naked eye with an apparent visual magnitude of +5.0.[2] The measured annual parallax shift of this star is 13.37 ± 0.17 mas,[1] which corresponds to a physical distance of 244 light-years (75 parsecs) with a 3 light-year margin of error. At that distance, the visual magnitude of the star is diminished by an extinction of 0.108 due to interstellar dust.[11]

This is an A-type main sequence star with a stellar classification of A2 Va.[3] Although it was one of the first stars to be cataloged as a Lambda Boötis star, Murphy et al. (2015) don't consider it to be a member of this population.[3] The star has nearly twice[6] the mass of the Sun and about 1.1[7] times the Sun's radius. It is an estimated 174[6] million years old and is spinning with a projected rotational velocity of 62 km/s.[6] Xi Aurigae is radiating 49.5[5] times the Sun's luminosity from its photosphere at an effective temperature of around 9,152 K.[6]

  1. ^ a b c d e f 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 Johnson1966 was invoked but never defined (see the help page).
  3. ^ a b c Cite error: The named reference Murphy2015 was invoked but never defined (see the help page).
  4. ^ Cite error: The named reference deBruijne2012 was invoked but never defined (see the help page).
  5. ^ a b c d Cite error: The named reference Anderson2012 was invoked but never defined (see the help page).
  6. ^ a b c d e Cite error: The named reference David2015 was invoked but never defined (see the help page).
  7. ^ a b Cite error: The named reference Fracassini2001 was invoked but never defined (see the help page).
  8. ^ Cite error: The named reference SIMBAD was invoked but never defined (see the help page).
  9. ^ Cite error: The named reference Eggleton2008 was invoked but never defined (see the help page).
  10. ^ Cite error: The named reference wagman18 was invoked but never defined (see the help page).
  11. ^ Cite error: The named reference Murphy2017 was invoked but never defined (see the help page).