AR Aurigae
| Observation data Epoch J2000 Equinox J2000 | |
|---|---|
| Constellation | Auriga |
| Right ascension | 05h 18m 18.896s |
| Declination | +33° 46′ 02.52″ |
| Apparent magnitude (V) | 6.144 |
| Characteristics | |
| Evolutionary stage | Main sequence |
| Spectral type | B9V + B9.5V + M |
| U−B color index | −0.18 |
| B−V color index | −0.06 |
| Variable type | Eclipsing |
| Astrometry | |
| Radial velocity (Rv) | 28.65±0.09 km/s |
| Proper motion (μ) | RA: +15.254 mas/yr Dec.: −29.225 mas/yr |
| Parallax (π) | 7.0735±0.0461 mas |
| Distance | 461 ± 3 ly (141.4 ± 0.9 pc) |
| Absolute magnitude (MV) | 1.11/1.17 |
| Orbit | |
| Primary | AR Aur A |
| Name | AR Aur B |
| Period (P) | 4.134581 days |
| Semi-major axis (a) | 0.08564±0.00018 AU |
| Inclination (i) | 88.6000±0.0072° |
| Semi-amplitude (K1) (primary) | 108.36±0.18 km/s |
| Semi-amplitude (K2) (secondary) | 116.92±0.17 km/s |
| Orbit | |
| Primary | AR Aur AB |
| Name | AR Aur C |
| Period (P) | 23.365±0.090 years |
| Semi-major axis (a) | 14.351 ± 0.042 AU |
| Eccentricity (e) | 0.268±0.022 |
| Inclination (i) | 88.510° |
| Argument of periastron (ω) (secondary) | 13.4±4.6° |
| Details | |
| AR Aur A | |
| Mass | 2.5444±0.0086 M☉ |
| Radius | 1.8433±0.0022 R☉ |
| Luminosity | 44.1+2.5 −2.4 L☉ |
| Surface gravity (log g) | 4.3125±0.0008 cgs |
| Temperature | 10,950±150 K |
| Rotational velocity (v sin i) | 22.555±0.027 km/s |
| Age | 33±3 Myr |
| AR Aur B | |
| Mass | 2.3581±0.0085 M☉ |
| Radius | 1.7658±0.0026 R☉ |
| Luminosity | 32.2+1.9 −1.8 L☉ |
| Surface gravity (log g) | 4.3169±0.0011 cgs |
| Temperature | 10,350±150 K |
| Rotational velocity (v sin i) | 21.604±0.032 km/s |
| Age | 33±3 Myr |
| AR Aur C | |
| Mass | 0.5122±0.0087 M☉ |
| Other designations | |
| 17 Aur, BD+33°1002, HD 34364, HIP 24740, HR 1728, SAO 57858, PPM 70158 | |
| Database references | |
| SIMBAD | data |
AR Aurigae (AR Aur), also known by its Flamsteed designation 17 Aurigae, is a triple star in the constellation Auriga. Based on parallax measurements made by the Gaia spacecraft, it is approximately 461 light-years from Earth.