| Observation data Epoch J2000.0 Equinox J2000.0 (ICRS) | |
|---|---|
| Constellation | Aries |
| Right ascension | 02h24m 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] |
| Distance | 870 ± 70 ly (270 ± 20 pc) |
| Absolute magnitude (MV) | −0.43[4] |
| Details | |
| Mass | 3.9[5] M☉ |
| Surface gravity (log g) | 3.897±0.017[5] cgs |
| Temperature | 13627±100[5] K |
| Rotational velocity (v sin i) | 164±8[5] km/s |
| Age | 195[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 | |
| SIMBAD | data |
Xi Arietis, Latinized from ξ Arietis, is the Bayer designation for a binary star[7] system in the northern constellationofAries. 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 ± 68light-years (267 ± 21parsecs) 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]
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