Xi Arietis

Xi Arietis
Observation data
Epoch J2000.0      Equinox J2000.0 (ICRS)
Constellation Aries
Right ascension 02h 24m 49.05655s[1]
Declination +10° 36′ 38.0236″[1]
Apparent magnitude (V) +5.46[2]
Characteristics
Spectral type B7 IV[3]
U−B color index −0.48[2]
B−V color index −0.10[2]
Astrometry
Proper motion (μ) RA: +20.09[1] mas/yr
Dec.: −14.79[1] mas/yr
Parallax (π)3.74 ± 0.29 mas[1]
Distance870 ± 70 ly
(270 ± 20 pc)
Absolute magnitude (MV)−0.43[4]
Details
Mass3.9[5] M☉
Surface gravity (log g)3.897±0.017[5] cgs
Temperature13627±100[5] K
Rotational velocity (v sin i)164±8[5] km/s
Age195[4] Myr
Other designations
ξ Ari, ψ Ceti, 24 Arietis, BD+09°316, FK5 2164, HD 14951, HIP 11249, HR 702, SAO 92932[6]
Database references
SIMBADdata

Xi Arietis, Latinized from ξ Arietis, is the Bayer designation for a binary star[7] system in the northern constellation of Aries. It has an apparent visual magnitude of 5.46,[2] and so is dimly visible to the naked eye. Based upon an annual parallax shift of 3.74±0.29 mas as seen from Earth, it is 872 ± 68 light-years (267 ± 21 parsecs) distant from the Sun. At that distance, the visual magnitude of the star is diminished by an extinction factor of 0.24 due to interstellar dust.[4]

This is a double-lined spectroscopic binary.[7] The spectrum matches a stellar classification of B7 IV,[3] which would indicate a subgiant star that has exhausted the supply of hydrogen at its core and is in the process of evolving into a giant star. Xi Arietis was once a designation for Psi Ceti (ψ Cet, ψ Ceti).[8]

  1. ^ a b c d e Cite error: The named reference vanLeeuwen2007 was invoked but never defined (see the help page).
  2. ^ a b c d Cite error: The named reference Crawford1971 was invoked but never defined (see the help page).
  3. ^ a b Cite error: The named reference Lesh1968 was invoked but never defined (see the help page).
  4. ^ a b c Cite error: The named reference Gontcharov2012 was invoked but never defined (see the help page).
  5. ^ a b c d Cite error: The named reference Huang2010 was invoked but never defined (see the help page).
  6. ^ Cite error: The named reference SIMBAD was invoked but never defined (see the help page).
  7. ^ a b Cite error: The named reference chini2012 was invoked but never defined (see the help page).
  8. ^ Cite error: The named reference ridpath was invoked but never defined (see the help page).