Upsilon Tauri
Upsilon Tauri (υ Tauri) is a solitary, white-hued star in the zodiac constellation of Taurus, and is a member of the Hyades star cluster. It is faintly visible to the naked eye with an apparent visual magnitude of +4.3. Based upon an annual parallax shift of 21.21 mas seen from Earth, it is around 154 light years from the Sun.
| Observation data Epoch J2000.0 Equinox J2000.0 (ICRS) | |
|---|---|
| Constellation | Taurus |
| Right ascension | 04h 26m 18.46368s |
| Declination | +22° 48′ 48.8885″ |
| Apparent magnitude (V) | 4.28 – 4.31 |
| Characteristics | |
| Spectral type | A8 Vn |
| U−B color index | +0.14 |
| B−V color index | +0.25 |
| Variable type | δ Scuti |
| Astrometry | |
| Radial velocity (Rv) | 32.2±1.1 km/s |
| Proper motion (μ) | RA: +108.81 mas/yr Dec.: −46.80 mas/yr |
| Parallax (π) | 21.21 ± 0.25 mas |
| Distance | 154 ± 2 ly (47.1 ± 0.6 pc) |
| Absolute magnitude (MV) | +0.91 |
| Details | |
| Mass | 1.55 M☉ |
| Radius | 1.803 R☉ |
| Luminosity | 32.5 L☉ |
| Surface gravity (log g) | 3.50 cgs |
| Temperature | 7,398±252 K |
| Rotation | 0.415 d |
| Rotational velocity (v sin i) | 243 km/s |
| Age | 827 Myr |
| Other designations | |
| Database references | |
| SIMBAD | data |
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