Omega Ursae Majoris

From Wikipedia, the free encyclopedia
Jump to: navigation, search
Omega Ursae Majoris
Diagram showing star positions and boundaries of the Ursa Major constellation and its surroundings
Diagram showing star positions and boundaries of the Ursa Major constellation and its surroundings

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
ω Ursae Majoris, ω UMa, Omega UMa, 45 Ursae Majoris, BD+43 2058, FK5 2870, GC 14974, HD 94334, HIP 53295, HR 4248, PPM 52125, SAO 43512.
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[edit]

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[edit]