Omega Ursae Majoris
 Location of ω Ursae Majoris (circled) |
|
| Observation data Epoch J2000.0 Equinox J2000.0 |
|
|---|---|
| Constellation | Ursa Major |
| Right ascension | 10h 53m 58.7s |
| Declination | +43° 11' 24" |
| Apparent magnitude (V) | +4.66 |
| Characteristics | |
| Spectral type | A1V s |
| Astrometry | |
| Distance | 267 ± 15 ly (82 ± 5 pc) |
| Other designations | |
| Database references | |
| SIMBAD | data |
Omega Ursae Majoris (Omega UMa, ω Ursae Majoris, ω UMa) is a binary star in the constellation Ursa Major. It is approximately 267 light years from Earth.
Omega Ursae Majoris is a spectroscopic binary which is classified as a white A-type main sequence dwarf with an apparent magnitude of +4.66. The binary system has an orbital period of 15.8 days.
Naming
In Chinese, 天牢 (Tiān Láo), meaning Celestial Prison, refers to an asterism consisting of ω Ursae Majoris, 57 Ursae Majoris, 47 Ursae Majoris, 58 Ursae Majoris, 49 Ursae Majoris and 56 Ursae Majoris. Consequently, ω Ursae Majoris itself is known as 天牢一 (Tiān Láo yī, English: the First Star of Celestial Prison.).[1]
References
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