Hyades, with ρ Tau appearing blue, left of center, marked with a red arrow
| |
| Observation data Epoch J2000.0 Equinox J2000.0 | |
|---|---|
| Constellation | Taurus |
| Right ascension | 04h33m 50.91753s[1] |
| Declination | +14° 50′ 39.9232″[1] |
| Apparent magnitude (V) | 4.66[2] |
| Characteristics | |
| Spectral type | A8V[3] |
| U−B color index | +0.09[2] |
| B−V color index | +0.24[2] |
| Variable type | δ Scuti[4] |
| Astrometry | |
| Radial velocity (Rv) | +39.6[5] km/s |
| Proper motion (μ) | RA: 103.20[1] mas/yr Dec.: −26.48[1] mas/yr |
| Parallax (π) | 20.61 ± 0.57 mas[1] |
| Distance | 158 ± 4 ly (49 ± 1 pc) |
| Absolute magnitude (MV) | +1.26[6] |
| Details | |
| Mass | 1.88[6]or2.09 ± 0.21[7] M☉ |
| Luminosity | 1.39[7] L☉ |
| Surface gravity (log g) | 4.02[7] cgs |
| Temperature | 7,640[7] K |
| Rotational velocity (v sin i) | 117[6] km/s |
| Other designations | |
ρ Tau, 86 Tau, BD+14 720, FK5 1125, HD 28910, HIP 21273, HR 1444, SAO 94007[8] | |
| Database references | |
| SIMBAD | data |
Rho Tauri (ρ Tau, ρ Tauri) is a star in the constellation Taurus and a member of the Hyades star cluster.[7]
Rho Tauri is a white A-type main sequence dwarf with a mean apparent magnitude of +4.66. It is approximately 158 light years from Earth. Classified as a Delta Scuti type[7] variable star, its brightness varies by 0.010 magnitudes over a period of 1.61 hours.[4]
It has 1.88 times the mass of the Sun, with a projected rotational velocity of 117 km/s and an estimated rotation period of 488.5 days.[6]
![A blue band light curve for Rho Tauri, adapted from Horan (1979)[9]](http://en.wikipedia.org/wiki/File:RhoTauLightCurve.png)
