Rho Tauri

Rho Tauri (ρ Tau, ρ Tauri) is a star in the constellation Taurus and a member of the Hyades star cluster.^[7]

ρ Tauri

Location of ρ Tauri (circled)
Observation data Epoch J2000.0      Equinox J2000.0
Constellation	Taurus
Right ascension	04h 33m 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] or 2.09±0.21[7] M☉
Radius	2.9[8] R☉
Luminosity	1.39[7] L☉
Surface gravity (log g)	4.02[7] cgs
Temperature	7,640[7] K
Metallicity [Fe/H]	−0.46[8] dex
Rotation	0.833[9] days
Rotational velocity (v sin i)	117[6] km/s
Age	1.0[8] Gyr
Other designations
ρ Tau, 86 Tau, BD+14 720, FK5 1125, HD 28910, HIP 21273, HR 1444, SAO 94007[10]
Database references
SIMBAD	data

Rho Tauri is a white A-type main sequence star 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]

• 
  Hyades, with ρ Tau appearing blue, left of center, marked with a red arrow
• 
  A blue band light curve for Rho Tauri, adapted from Horan (1979)^[11]