134 Tauri
Star in the constellation Taurus
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134 Tauri is a single[9] star in the zodiac constellation of Taurus. Its apparent magnitude is 4.89,[2] which is bright enough to be faintly visible to the naked eye. The distance to this star, based upon an annual parallax shift of 13.11±0.33 mas,[1] is around 249 light years. The star is moving further from the Sun with a heliocentric radial velocity of +20.5 km/s, having made its closest approach some three million years ago at a distance of 107 ly (32.7 pc).[2]
| Observation data Epoch J2000 Equinox J2000 | |
|---|---|
| Constellation | Taurus |
| Right ascension | 05h 49m 32.92974s[1] |
| Declination | +12° 39′ 04.7582″[1] |
| Apparent magnitude (V) | 4.89[2] |
| Characteristics | |
| Evolutionary stage | main sequence[3] |
| Spectral type | B9 IV[4] |
| B−V color index | −0.068±0.004[2] |
| Astrometry | |
| Radial velocity (Rv) | +20.5±0.1[5] km/s |
| Proper motion (μ) | RA: −22.98[1] mas/yr Dec.: −18.22[1] mas/yr |
| Parallax (π) | 13.11±0.33 mas[1] |
| Distance | 249 ± 6 ly (76 ± 2 pc) |
| Absolute magnitude (MV) | +0.48[2] |
| Details | |
| Mass | 2.99[6] M☉ |
| Radius | 2.82[7] R☉ |
| Luminosity | 88[7] L☉ |
| Surface gravity (log g) | 3.97[7] cgs |
| Temperature | 10,520[7] K |
| Rotational velocity (v sin i) | 26[6] km/s |
| Age | 248[6] Myr |
| Other designations | |
| 134 Tau, BD+12°912, HD 38899, HIP 27511, HR 2010, SAO 94888, WDS J05495+1239A[8] | |
| Database references | |
| SIMBAD | data |
This is an MK-standard star with a stellar classification of B9 IV,[4] matching a subgiant star that is evolving away from the main sequence having exhausted the hydrogen at its core. It has a low projected rotational velocity[4] of 26 km/s.[6] The star is about 248 million years old with three times the mass of the Sun[6] and approximately 2.8 times the Sun's radius.[7] It is radiating around 88 times the Sun's luminosity from its photosphere at an effective temperature of about 10,520 K.[7]