| Observation data EpochJ2000.0 EquinoxJ2000.0 (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−Bcolor index | +0.12[2] |
| B−Vcolor 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] |
| Distance | 244 ± 3 ly (74.8 ± 0.9 pc) |
| Absolute magnitude (MV) | +0.64[5] |
| Details[6] | |
| Mass | 1.96 M☉ |
| Radius | 1.1[7] R☉ |
| Luminosity | 49.5[5] L☉ |
| Surface gravity (log g) | 3.88 cgs |
| Temperature | 9,152±311 K |
| Metallicity [Fe/H] | −0.36±0.04[5] dex |
| Rotational velocity (v sin i) | 62 km/s |
| Age | 174 Myr |
| Other designations | |
| ξ Ari,30 Aurigae,BD+55° 1027,FK5 1157,HD 39283,HIP 27949,HR 2029,SAO 25450[8] | |
| Database references | |
| SIMBAD | data |
Xi Aurigae,Latinized from ξ Aurigae, is theBayer designation for a single,[9] white-huedstar in the northernconstellation ofAuriga. This star was once considered part of the constellation ofCamelopardalis and held theFlamsteed designation32 Camelopardalis.[10] It is visible to the naked eye with anapparent visual magnitude of +5.0.[2] The measured annualparallax shift of this star is13.37 ± 0.17mas,[1] which corresponds to a physical distance of 244light-years (75parsecs) with a 3 light-yearmargin of error. At that distance, the visual magnitude of the star is diminished by anextinction of 0.108 due tointerstellar dust.[11]
This is anA-type main sequence star with astellar classification of A2 Va.[3] Although it was one of the first stars to be cataloged as aLambda Boötis star, Murphy et al. (2015) don't consider it to be a member of this population.[3] The star has nearly twice[6] themass of the Sun and about 1.1[7] times theSun's radius. It is an estimated 174[6] million years old and is spinning with aprojected rotational velocity of 62 km/s.[6] Xi Aurigae is radiating 49.5[5] times theSun's luminosity from itsphotosphere at aneffective temperature of around 9,152 K.[6]
