Omega Tauri
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
| 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 | |
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
| 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 | |
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
- 1 2 3 4 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
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