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Upsilon Tauri
Star in the constellation of Taurus / From Wikipedia, the free encyclopedia
Not to be confused with Y Tauri.
Upsilon Tauri (υ Tauri) is a solitary,[11] white-hued star in the zodiac constellation of Taurus, and is a member of the Hyades star cluster.[8] 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.
Quick Facts Constellation, Right ascension ...
Observation data Epoch J2000.0 Equinox J2000.0 (ICRS) | |
---|---|
Constellation | Taurus |
Right ascension | 04h 26m 18.46368s[1] |
Declination | +22° 48′ 48.8885″[1] |
Apparent magnitude (V) | 4.28 – 4.31[2] |
Characteristics | |
Spectral type | A8 Vn[3] |
U−B color index | +0.14[4] |
B−V color index | +0.25[4] |
Variable type | δ Scuti[2] |
Astrometry | |
Radial velocity (Rv) | 32.2±1.1[5] km/s |
Proper motion (μ) | RA: +108.81[1] mas/yr Dec.: −46.80[1] mas/yr |
Parallax (π) | 21.21 ± 0.25 mas[1] |
Distance | 154 ± 2 ly (47.1 ± 0.6 pc) |
Absolute magnitude (MV) | +0.91[6] |
Details | |
Mass | 1.55[7] M☉ |
Radius | 1.803[8] R☉ |
Luminosity | 32.5[9] L☉ |
Surface gravity (log g) | 3.50[7] cgs |
Temperature | 7,398±252[7] K |
Rotation | 0.415 d[8] |
Rotational velocity (v sin i) | 243[3] km/s |
Age | 827[7] Myr |
Other designations | |
Database references | |
SIMBAD | data |
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