Iota Aurigae
Iota Aurigae (ι Aurigae, abbreviated Iota Aur, ι Aur), officially named Hassaleh /ˈhæsəleɪ/, is a star in the northern constellation of Auriga. 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 490 light-years (150 parsecs) from the Sun.
| Observation data Epoch J2000 Equinox J2000 | |
|---|---|
| Constellation | Auriga |
| Right ascension | 04h 56m 59.62109s |
| Declination | +33° 09′ 57.9585″ |
| Apparent magnitude (V) | 2.69 |
| Characteristics | |
| Spectral type | K3 II |
| U−B color index | +1.78 |
| B−V color index | +1.53 |
| Variable type | Suspected |
| Astrometry | |
| Radial velocity (Rv) | +17.78 km/s |
| Proper motion (μ) | RA: +6.79 mas/yr Dec.: −14.88 mas/yr |
| Parallax (π) | 6.61 ± 0.38 mas |
| Distance | 490 ± 30 ly (151 ± 9 pc) |
| Absolute magnitude (MV) | −3.20 |
| Details | |
| Mass | 7.1 ± 0.7 M☉ |
| Radius | 127 R☉ |
| Luminosity | 4,581 L☉ |
| Surface gravity (log g) | 1.74 cgs |
| Temperature | 4,160 K |
| Metallicity [Fe/H] | –0.11 dex |
| Rotational velocity (v sin i) | 8 km/s |
| Age | 39.8 ± 4.9 Myr |
| Other designations | |
| Database references | |
| SIMBAD | data |
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