Iota Tauri
Iota Tauri, Latinized from ι Tauri, is a white-hued star in the zodiac constellation Taurus and an outlying member of the Hyades star cluster. It is visible to the naked eye with an apparent visual magnitude of 4.62, and is located at an estimated distance of about 173 light years based upon parallax measurements. The star is moving away from the Sun with a radial velocity of +38 km/s.
| Observation data Epoch J2000 Equinox J2000 | |
|---|---|
| Constellation | Taurus |
| Right ascension | 05h 03m 05.74725s |
| Declination | 21° 35′ 23.8627″ |
| Apparent magnitude (V) | 4.62 |
| Characteristics | |
| Spectral type | A7 V |
| U−B color index | +0.15 |
| B−V color index | +0.16 |
| Astrometry | |
| Radial velocity (Rv) | +38.30 km/s |
| Proper motion (μ) | RA: +68.88 mas/yr Dec.: -41.06 mas/yr |
| Parallax (π) | 18.88 ± 0.30 mas |
| Distance | 173 ± 3 ly (53.0 ± 0.8 pc) |
| Absolute magnitude (MV) | 1.00 |
| Details | |
| Mass | 2.22 M☉ |
| Radius | 2.6 R☉ |
| Luminosity | 36 L☉ |
| Surface gravity (log g) | 3.97 cgs |
| Temperature | 8,054 K |
| Metallicity [Fe/H] | +0.15 dex |
| Rotational velocity (v sin i) | 131 km/s |
| Age | 717 Myr |
| Other designations | |
| Database references | |
| SIMBAD | data |
This has been reported as a double star with two components at separation 0.1", both of type A7V and magnitude 5.4. The combined spectrum matches a stellar classification of A7 V, which would normally indicate an A-type main-sequence star that is generating energy through hydrogen fusion at its core. It has an estimated age of 717 million years.
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