71 Tauri is a suspected triple star[10] system in the zodiac constellation Taurus, located 146 light years from the Sun.[2] It is visible to the naked eye as a faint, yellow-white hued star with an apparent visual magnitude of +4.48.[3] The star is moving further away from the Earth with a heliocentric radial velocity of +38 km/s.[6] It is a member of the Hyades open cluster.[11]
Observation data Epoch J2000.0 Equinox J2000.0 | |
---|---|
Constellation | Taurus |
Right ascension | 04h 26m 20.77302s[2] |
Declination | +15° 37′ 05.7885″[2] |
Apparent magnitude (V) | +4.48[3] |
Characteristics | |
Spectral type | F0 V[4] |
U−B color index | +0.13[3] |
B−V color index | +0.25[3] |
Variable type | δ Sct[5] |
Astrometry | |
Radial velocity (Rv) | +38.3[6] km/s |
Proper motion (μ) | RA: +85.393[2] mas/yr Dec.: −14.869[2] mas/yr |
Parallax (π) | 22.4141 ± 0.4969 mas[2] |
Distance | 146 ± 3 ly (44.6 ± 1.0 pc) |
Absolute magnitude (MV) | 1.10[7] |
Details | |
Mass | 1.94[7] M☉ |
Radius | 3.34[4] R☉ |
Surface gravity (log g) | 3.73[8] cgs |
Temperature | 7,543[4] K |
Rotation | 14.2[7] d |
Rotational velocity (v sin i) | 192[7] km/s |
Age | 966[8] Myr |
Other designations | |
Database references | |
SIMBAD | data |
The primary component is an F-type main-sequence star with a stellar classification of F0 V.[4] It is a Delta Scuti variable with an amplitude of 0.02 in magnitude and a frequency of 0.16 d−1.[5] This star has about 1.94[7] times the mass of the Sun and 3.34[4] times the Sun's radius. It has a projected rotational velocity of 192 km s−1, for an estimated rotation period of 14.2 days.[7] Extreme ultraviolet flares have been observed coming from this star's hot corona,[4] and it is the second brightest X-ray source in the Hyades.[11]