Omicron Ursae Majoris
Star in the constellation Ursa Major / From Wikipedia, the free encyclopedia
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"Muscida" redirects here. For other stars with this name, see π Ursae Majoris.
Omicron Ursae Majoris (ο Ursae Majoris, abbreviated Omicron UMa, ο UMa), formally named Muscida /ˈmjuːsɪdə/,[12][13] is a star system in the northern circumpolar constellation of Ursa Major. It has an apparent visual magnitude of +3.35[2] and is located at a distance of around 179 light-years (55 parsecs) from the Sun.[1] In 2012, an exoplanet designated Omicron Ursae Majoris Ab was found to be orbiting the primary.[9]
Quick Facts Constellation, Right ascension ...
Observation data Epoch J2000.0 Equinox J2000.0 | |
---|---|
Constellation | Ursa Major |
Right ascension | 08h 30m 15.87064s[1] |
Declination | +60° 43′ 05.4115″[1] |
Apparent magnitude (V) | +3.35[2] |
Characteristics | |
Spectral type | G5III:[3] |
U−B color index | +0.52[4] |
B−V color index | +0.85[4] |
Astrometry | |
Radial velocity (Rv) | +19.8[5] km/s |
Proper motion (μ) | RA: -133.644[6] mas/yr Dec.: -107.664[6] mas/yr |
Parallax (π) | 17.9335 ± 0.1456 mas[6] |
Distance | 182 ± 1 ly (55.8 ± 0.5 pc) |
Absolute magnitude (MV) | –0.40[7] |
Details | |
Mass | 3.09[7] M☉ |
Radius | 14[8] R☉ |
Luminosity | 138[7] L☉ |
Surface gravity (log g) | 2.64[7] cgs |
Temperature | 5,242[7] K |
Metallicity [Fe/H] | –0.09[7] dex |
Rotational velocity (v sin i) | 3.83[9] km/s |
Age | 360 ± 30[10] Myr |
Other designations | |
Database references | |
SIMBAD | data |
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