| Observation data Epoch J2000 Equinox J2000 | |
|---|---|
| Constellation | Auriga |
| Right ascension | 05h 23m 22.87264s[1] |
| Declination | +28° 56′ 12.3397″[1] |
| Apparent magnitude (V) | 6.45[2] |
| Characteristics | |
| Evolutionary stage | main sequence[3] |
| Spectral type | B9 Vs[4] |
| B−Vcolor index | −0.040±0.008[2] |
| Astrometry | |
| Radial velocity (Rv) | +9.6±2.7[2] km/s |
| Proper motion (μ) | RA: +16.123[1]mas/yr Dec.: −32.096[1]mas/yr |
| Parallax (π) | 6.0711±0.0689 mas[1] |
| Distance | 537 ± 6 ly (165 ± 2 pc) |
| Absolute magnitude (MV) | 0.41[2] |
| Details | |
| Mass | 2.85±0.08[3] M☉ |
| Radius | 3.1[5] R☉ |
| Luminosity | 89.7+15.5 −10.1[3] L☉ |
| Temperature | 10,764+140 −49[3] K |
| Rotational velocity (v sin i) | 66[3] km/s |
| Other designations | |
| 22 Aur,BD+28°788,HD 35076,HIP 25192,HR 1768,SAO 77139[6] | |
| Database references | |
| SIMBAD | data |
22 Aurigae is astar located 537 light years away from the Sun in the northernconstellationAuriga. It is just bright enough to be barely visible to the naked eye under good viewing conditions, appearing as a blue-white hued star with anapparent visual magnitude of 6.45.[2] At the distance of this object, the brightness is diminished by anextinction of 0.57 due tointerstellar dust.[7] The star is moving further from the Earth with a heliocentricradial velocity of +10 km/s,[2] and it is a member of the Taurion OB association, located between Orion and Taurus.[8]
This object is aB-type main-sequence star with astellar classification of B9 Vs.[4] The 's' notation indicates thespectrum appears "sharp"-lined, due to its relatively moderateprojected rotational velocity of 66 km/s.[3] It has 2.9[3] times themass of the Sun and about 3.1[5] times theSun's radius. The star is radiating 90[3] times theluminosity of the Sun from itsphotosphere at aneffective temperature of 10,764 K.[3]
