Iota Aurigae
| Observation data Epoch J2000 Equinox J2000 | |
|---|---|
| Constellation | Auriga |
| Right ascension | 04h 56m 59.620s |
| Declination | +33° 09′ 57.94″ |
| Apparent magnitude (V) | 2.69 |
| Characteristics | |
| Spectral type | K3 II–III |
| U−B color index | +1.78 |
| B−V color index | +1.53 |
| R−I color index | +0.82 |
| Variable type | Suspected |
| Astrometry | |
| Radial velocity (Rv) | +17.78 km/s |
| Proper motion (μ) | RA: +3.817 mas/yr Dec.: −17.786 mas/yr |
| Parallax (π) | 7.2491±0.3819 mas |
| Distance | 450 ± 20 ly (138 ± 7 pc) |
| Absolute magnitude (MV) | −3.20 |
| Details | |
| Mass | 7.1±0.7 M☉ |
| Radius | 126 R☉ |
| Luminosity | 3,897±327 L☉ |
| Temperature | 4,059±125 K |
| Metallicity [Fe/H] | −0.11 dex |
| Rotational velocity (v sin i) | 8 km/s |
| Age | 39.8±4.9 Myr |
| Other designations | |
| Hassaleh, Kabdhilinan, ι Aur, 3 Aurigae, BD+32°855, FK5 181, GC 6029, HD 31398, HIP 23015, HR 1577, SAO 57522 | |
| Database references | |
| SIMBAD | data |
Iota Aurigae is a star in the northern constellation of Auriga. Its name is a Bayer designation that is Latinized from ι Aurigae, abbreviated Iota Aur or ι Aur. The star has the official name Hassaleh, pronounced /ˈhæsəleɪ/. It has an apparent visual magnitude of 2.7, which is bright enough to be readily visible to the naked eye. Parallax measurements give a distance estimate of roughly 450 light-years (140 parsecs) from the Sun. It is drifting further away with a radial velocity of +18 km/s.