Omega Tauri

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The Bayer designation Omega Tauri (ω Tau, ω Tauri) is shared by two star systems, ω¹ Tauri and ω² Tauri, in the constellation Taurus. They are separated by 2.13° on the sky.

ω¹ Tauri[edit]

ω¹ Tauri
Observation data
Epoch J2000.0      Equinox J2000.0
Constellation Taurus
Right ascension 04h 09m 10.0s
Declination +19° 36′ 33″
Apparent magnitude (V) +5.51[1]
Distance 291 ± 23 ly
(89 ± 7 pc)
Spectral type K2 III[1]
Other designations
43 Tauri, BD+19 672, FK5 1115, HD 26162, HIP 19388, HR 1283, SAO 93785.

Omega-1 Tauri is an orange K-type giant with an apparent magnitude of +5.51 and 1.39 times the mass of the Sun.[1] It is approximately 291 light years from Earth and has an absolute magnitude of 0.76.[1]

ω² Tauri[edit]

ω² Tauri
Observation data
Epoch J2000.0      Equinox J2000.0
Constellation Taurus
Right ascension 04h 17m 15.6s
Declination +20° 34' 43"
Apparent magnitude (V) +4.93
Distance 93.5 ± 2.1 ly
(28.7 ± 0.7 pc)
Spectral type A3m
Other designations
50 Tauri, HR 1329, HD 27045, BD+20 724, HIP 19990, SAO 76532, GC 5172, CCDM 04173+2035

Omega-2 Tauri is a white A-type star with an apparent magnitude of +4.93. It is approximately 93.5 light years from Earth.

References[edit]

  1. ^ a b c d Hekker, S.; et al. (August 2006), "Precise radial velocities of giant stars. I. Stable stars", Astronomy and Astrophysics, 454 (3): 943–949, Bibcode:2006A&A...454..943H, arXiv:astro-ph/0604502Freely accessible, doi:10.1051/0004-6361:20064946