Mu Tauri
Star in the constellation Taurus
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μ Tauri, Latinized as Mu Tauri, is a single[11] star in the equatorial constellation of Taurus. It has a blue-white hue and is faintly visible to the naked eye with an apparent visual magnitude of 4.27.[2] The star is located approximately 490 light years distant from the Sun based on parallax,[1] and is drifting further away with a radial velocity of +16 km/s.[5]
 | |
| Observation data Epoch J2000 Equinox J2000 | |
|---|---|
| Constellation | Taurus |
| Right ascension | 04h 15m 32.05687s[1] |
| Declination | +08° 53′ 32.4916″[1] |
| Apparent magnitude (V) | 4.27[2] |
| Characteristics | |
| Spectral type | B3IV[3] |
| U−B color index | −0.51[4] |
| B−V color index | −0.05[4] |
| Astrometry | |
| Radial velocity (Rv) | +16.3±0.6[5] km/s |
| Proper motion (μ) | RA: +20.881[1] mas/yr Dec.: −22.789[1] mas/yr |
| Parallax (π) | 6.6651±0.3319 mas[1] |
| Distance | 490 ± 20 ly (150 ± 7 pc) |
| Absolute magnitude (MV) | −1.45[2] |
| Details | |
| Mass | 6.7[6] M☉ |
| Luminosity | 462[2] L☉ |
| Surface gravity (log g) | 3.75[7] cgs |
| Temperature | 16,980[7] K |
| Metallicity [Fe/H] | −0.16[2] dex |
| Rotational velocity (v sin i) | 89[8] km/s |
| Age | 252[9] Myr |
| Other designations | |
| μ Tau, 49 Tauri, BD+08°657, FK5 1118, GC 5134, HD 26912, HIP 116820, HR 1320, SAO 111696, GSC 00667-00839[10] | |
| Database references | |
| SIMBAD | data |
This object has a stellar classification of B3IV,[3] matching a B-type subgiant star. In the past this star was thought to have a variable radial velocity, but is now considered constant.[12] It is 252[9] million years old and is spinning with a projected rotational velocity of 89 km/s.[8] The star has 6.7[6] times the mass of the Sun and is radiating 462[2] times the Sun's luminosity from its photosphere at an effective temperature of 16,980 K.[7] It is emitting an infrared excess at a wavelength of 18 μm, making it a candidate host of a faint warm debris disk.[13]