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 spectroscopic binary star with an apparent magnitude of +4.93. It is approximately 93.5 light years from Earth. Its two components are separated by 0.05 arcseconds, or at least 1.4 astronomical units, and have an orbital period in excess of 14 years.

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, arXiv:astro-ph/0604502, Bibcode:2006A&A...454..943H, doi:10.1051/0004-6361:20064946