90 Tauri
90 Tauri (90 Tau) is a star in the zodiac constellation of Taurus, located 144 light-years away from the Sun. It is visible to the naked eye as a faint, white-hued star with an apparent visual magnitude of 4.27. 90 Tauri is a member of the Hyades cluster and is listed as a double star.
| Observation data Epoch J2000 Equinox J2000 | |
|---|---|
| Constellation | Taurus |
| Right ascension | 04h 38m 09.46166s |
| Declination | +12° 30′ 38.9918″ |
| Apparent magnitude (V) | 4.27 |
| Characteristics | |
| Spectral type | A6 V |
| U−B color index | +0.11 |
| B−V color index | +0.12 |
| Astrometry | |
| Radial velocity (Rv) | 40.30±1 km/s |
| Proper motion (μ) | RA: 102.40 mas/yr Dec.: −15.78 mas/yr |
| Parallax (π) | 22.6374 ± 0.3453 mas |
| Distance | 144 ± 2 ly (44.2 ± 0.7 pc) |
| Absolute magnitude (MV) | +1.18 |
| Details | |
| Mass | 2.09±0.11 M☉ |
| Radius | 2.8 R☉ |
| Surface gravity (log g) | 3.88±0.10 cgs |
| Temperature | 8,130 K |
| Rotational velocity (v sin i) | 89 km/s |
| Other designations | |
| Database references | |
| SIMBAD | data |
This is an A-type main-sequence star with a stellar classification of A6 V. It has 2.1 times the mass of the Sun and 2.8 times the Sun's radius. An orbiting companion was announced in 2014. This is probably a spectral class K4V star with an estimated orbital period of at least 84 days. The primary is being orbited by a debris disk.
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