| |
| Observation data Epoch J2000.0 Equinox J2000.0 | |
|---|---|
| Constellation | Taurus |
| Right ascension | 04h26m 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 | |
71 Tau, V777 Tau, BD+15°625, GC 5375, HD 28052, HIP 20713, HR 1394, SAO 93932[9] | |
| Database references | |
| SIMBAD | data |
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]
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]
