  | |
| Observation data EpochJ2000 EquinoxJ2000 | |
|---|---|
| Constellation | Taurus |
| Right ascension | 04h 28m 50.1636s[1] |
| Declination | +13° 02′ 51.367″[1] |
| Apparent magnitude (V) | 5.014[2] |
| Characteristics | |
| Spectral type | kA5hF0VmF0[3] |
| U−Bcolor index | +0.12[4] |
| B−Vcolor index | +0.23[4] |
| Astrometry | |
| Radial velocity (Rv) | +33.7276±0.0324[5] km/s |
| Proper motion (μ) | RA: +104.066[1]mas/yr Dec.: −14.900[1]mas/yr |
| Parallax (π) | 20.7158±0.0899 mas[1] |
| Distance | 157.4 ± 0.7 ly (48.3 ± 0.2 pc) |
| Absolute magnitude (MV) | 1.58[6] |
| Details | |
| Mass | 1.9[1] M☉ |
| Radius | 2.4[1] R☉ |
| Luminosity | 18[1] L☉ |
| Surface gravity (log g) | 3.88[1] cgs |
| Temperature | 7,681[1] K |
| Metallicity [Fe/H] | +0.35[6] dex |
| Rotation | 0.925 d[7] |
| Rotational velocity (v sin i) | 106.3[7] km/s |
| Age | 971[1] Myr |
| Other designations | |
| b Tau,BD+12°598,HD 28355,HIP 20901,HR 1414 | |
| Database references | |
| SIMBAD | data |
79 Tauri, also known asb Tauri, is anAm star in theconstellation ofTaurus with anapparent magnitude of 5.0. It is a member of theHyadesopen cluster andparallax measurements byGaia give a distance of about157 light years.
The spectrum of 79 Tauri shows abnormal abundances of metals, with many showing unusually strongabsorption lines, but some such as calcium showing weaker lines than expected. This is represented in the spectral type kA5hF0VmF0, which is F0 based on its hydrogen lines, but A5 based on itscalcium K-lines, and F0 based on the lines of other metals.[3] Other publications often give the spectral class based on hydrogen lines as A7.[8] It is classified as an Am star, a type of star with strong magnetic fields and slow rotation causing stratification of elements within its atmosphere.[9]
79 Tauri lies about two degrees south of the mainVasterism of the Hyades open cluster. It lies 11 light years from the centre of the cluster and is generally considered to be a member.[10] With a mass of 1.9 M☉, it is amain sequence star with an age of 971 million years. It has aneffective temperature of7,681 K and a radius of 2.4 R☉, it radiates 18 times theluminosity of the Sun.
