Tau Tauri

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τ Tauri
Observation data
Epoch J2000.0      Equinox J2000.0
Constellation Taurus
Right ascension 04h 42m 14.7s
Declination +22° 57' 25"
Apparent magnitude (V) +4.26
Distance 401 ± 38 ly
(123 ± 12 pc)
Spectral type B3V
Other designations
94 Tauri, HR 1497, HD 29763, BD+22 739, FK5 174, HIP 21881, SAO 76721, GC 5716, BDS 2313, CCDM 04422+2257

Tau Tauri (τ Tau, τ Tauri) is a triple star system[citation needed] in the constellation Taurus. It is approximately 401 light years from Earth.

The primary component, Tau Tauri A, is a blue-white B-type main sequence dwarf with an apparent V magnitude of +4.26.[1] It has a close companion 0.1 arcseconds away which has a magnitude of +8.9. At a separation of 63 arcseconds is the third component of the system, Tau Tauri C, which is classified as a white A-type star and has a V magnitude of +7.10.[1]


  1. ^ a b BLANCO V.M. , DEMERS S., DOUGLASS G.G., FITZGERALD M.P. Publ. U.S. Naval Obs. Second Serie, 21, 0 (1968) Photoelectric catalogue, magnitudes and colors of stars in the UBV and UCBV systems.