Beta Tauri
Star in the constellation Taurus / From Wikipedia, the free encyclopedia
"Elnath", "Alnath", and "Nath (star)" redirect here. For other topics, see El Nath (disambiguation) and Nath (disambiguation).
Beta Tauri is the second-brightest star in the constellation of Taurus. It has the official name Elnath; Beta Tauri is the current Bayer designation, which is Latinised from β Tauri and abbreviated Beta Tau or β Tau. The original designation of Gamma Aurigae is now rarely used. It is a chemically peculiar B7 giant star, 134 light years away from the Sun with an apparent magnitude of 1.65.
Quick Facts Observation data Epoch J2000 Equinox J2000, Constellation ...
Observation data Epoch J2000 Equinox J2000 | |
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Constellation | Taurus |
Pronunciation | /ɛlˈnæθ/[1] or /ˈɛlnæθ/[2] |
Right ascension | 05h 26m 17.51312s[3] |
Declination | +28° 36′ 26.8262″[3] |
Apparent magnitude (V) | 1.65[4] |
Characteristics | |
Spectral type | B7III[5] |
U−B color index | −0.49[4] |
B−V color index | −0.13[4] |
Astrometry | |
Radial velocity (Rv) | 9.2[6] km/s |
Proper motion (μ) | RA: +22.76[3] mas/yr Dec.: −173.58[3] mas/yr |
Parallax (π) | 24.36 ± 0.34 mas[3] |
Distance | 134 ± 2 ly (41.1 ± 0.6 pc) |
Absolute magnitude (MV) | −1.42[7] |
Details | |
Mass | 5.0±0.1[8] M☉ |
Radius | 4.82±0.34[9] – 5.47±0.24[10] R☉ |
Luminosity | 564±20[10] L☉ |
Surface gravity (log g) | 3.63[10] cgs |
Temperature | 13,600±100[9] K |
Metallicity [Fe/H] | +0.2[10] dex |
Rotational velocity (v sin i) | 59[11] km/s |
Age | 100±10[8] Myr |
Other designations | |
Database references | |
SIMBAD | data |
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