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- Omicron_Ursae_Majoris abstract "Omicron Ursae Majoris (Omicron UMa, ο Ursae Majoris, ο UMa) is a star system in the northern circumpolar constellation of Ursa Major. It has an apparent visual magnitude of +3.35 and is located at a distance of around 179 light-years (55 parsecs) from Earth. This star has the traditional name Muscida, which it shares with the optical double star Pi Ursae Majoris.The stellar classification of this star, G4 II–III, places it midway between the giant and bright giant stages of its evolution. The interferometry-measured angular diameter of this star is about 2.42 mas, which, at its estimated distance, equates to a physical radius of about 14 times the radius of the Sun. It has about three times the mass of the Sun and radiates 138 times the Sun's luminosity from its outer atmosphere at an effective temperature of 5,282 K, giving it the yellowish hue of a G-type star.In 1963, East German astronomer Gerhard Jakisch reported this star as a variable with a period of 358 days and an amplitude of 0.08 magnitude. The 1982 edition of the New Catalogue of Suspected Variable Stars listed it with a variability from 3.30 to 3.36 in the visual band. However, in 1992 American astronomer Dorrit Hoffleit noted that the two comparison stars used to determine the variability may themselves be variable. Hence the actual variability of this star may be suspect.Muscida has a magnitude 15.2 common proper motion companion at an angular separation of 7.1 arcseconds. With a probability of 99.4%, this companion is the source for the X-ray emission from the system. Omicron Ursae Majoris is sometimes listed with two more companions, but, based on proper motion data, these appear to be optical companions.This system is a member of the thin disk population and is following an orbit through the Milky Way galaxy with an eccentricity of 0.12. It comes as close to the Galactic Center as 23.5 kly (7.2 kpc) and as distant as 30.2 kly (9.3 kpc). This orbit carries it no more than about 330 ly (100 pc) above the galactic plane. It is considered a runaway star because it has a high peculiar velocity of 35.5 km s−1 relative to the typical motion of stars in its vicinity.In 2012, extrasolar planet Omicron Ursae Majoris Ab orbiting the primary at 3.9 astronomical units, was found. This gas giant (4.1 times as massive as Jupiter) completes orbit in 1630 days.".
- Omicron_Ursae_Majoris thumbnail Ursa_Major_IAU.svg?width=300.
- Omicron_Ursae_Majoris wikiPageID "2710781".
- Omicron_Ursae_Majoris wikiPageRevisionID "606320872".
- Omicron_Ursae_Majoris absmagV "–0.40".
- Omicron_Ursae_Majoris appmagV "+3.35".
- Omicron_Ursae_Majoris bV "+0.85".
- Omicron_Ursae_Majoris class "G4 II–III".
- Omicron_Ursae_Majoris constell Ursa_Major.
- Omicron_Ursae_Majoris eccentricity "0.13".
- Omicron_Ursae_Majoris epoch Epoch_(astronomy).
- Omicron_Ursae_Majoris exoplanet Omicron_Ursae_Majoris.
- Omicron_Ursae_Majoris gravity "2.64".
- Omicron_Ursae_Majoris hasPhotoCollection Omicron_Ursae_Majoris.
- Omicron_Ursae_Majoris luminosity "138".
- Omicron_Ursae_Majoris mass "3.09".
- Omicron_Ursae_Majoris mass ">4.1".
- Omicron_Ursae_Majoris metalFe "–0.09".
- Omicron_Ursae_Majoris pError "0.16".
- Omicron_Ursae_Majoris parallax "18.21".
- Omicron_Ursae_Majoris period "1630".
- Omicron_Ursae_Majoris propMoDec "–107.45".
- Omicron_Ursae_Majoris propMoRa "–133.76".
- Omicron_Ursae_Majoris radialV "+19.8".
- Omicron_Ursae_Majoris radius "14".
- Omicron_Ursae_Majoris rotationalVelocity "15".
- Omicron_Ursae_Majoris semimajor "3.9".
- Omicron_Ursae_Majoris temperature "5242".
- Omicron_Ursae_Majoris uB "+0.52".
- Omicron_Ursae_Majoris subject Category:Bayer_objects.
- Omicron_Ursae_Majoris subject Category:Binary_stars.
- Omicron_Ursae_Majoris subject Category:Flamsteed_objects.
- Omicron_Ursae_Majoris subject Category:G-type_giants.
- Omicron_Ursae_Majoris subject Category:Planetary_systems.
- Omicron_Ursae_Majoris subject Category:Stars_with_proper_names.
- Omicron_Ursae_Majoris subject Category:Ursa_Major_(constellation).
- Omicron_Ursae_Majoris type Animal100015388.
- Omicron_Ursae_Majoris type BayerObjects.
- Omicron_Ursae_Majoris type BinaryStar109221070.
- Omicron_Ursae_Majoris type BinaryStars.
- Omicron_Ursae_Majoris type CelestialBody109239740.
- Omicron_Ursae_Majoris type FlamsteedObjects.
- Omicron_Ursae_Majoris type G-typeGiants.
- Omicron_Ursae_Majoris type Giant101323781.
- Omicron_Ursae_Majoris type LivingThing100004258.
- Omicron_Ursae_Majoris type NaturalObject100019128.
- Omicron_Ursae_Majoris type Object100002684.
- Omicron_Ursae_Majoris type Organism100004475.
- Omicron_Ursae_Majoris type PhysicalEntity100001930.
- Omicron_Ursae_Majoris type Star109444100.
- Omicron_Ursae_Majoris type StarsWithProperNames.
- Omicron_Ursae_Majoris type Whole100003553.
- Omicron_Ursae_Majoris type CelestialBody.
- Omicron_Ursae_Majoris type Star.
- Omicron_Ursae_Majoris type PhysicalBody.
- Omicron_Ursae_Majoris comment "Omicron Ursae Majoris (Omicron UMa, ο Ursae Majoris, ο UMa) is a star system in the northern circumpolar constellation of Ursa Major. It has an apparent visual magnitude of +3.35 and is located at a distance of around 179 light-years (55 parsecs) from Earth. This star has the traditional name Muscida, which it shares with the optical double star Pi Ursae Majoris.The stellar classification of this star, G4 II–III, places it midway between the giant and bright giant stages of its evolution.".
- Omicron_Ursae_Majoris label "Muscida".
- Omicron_Ursae_Majoris label "Muscida".
- Omicron_Ursae_Majoris label "Muscida".
- Omicron_Ursae_Majoris label "Omicron Ursae Majoris".
- Omicron_Ursae_Majoris label "Omicron Ursae Majoris".
- Omicron_Ursae_Majoris label "Omicron Ursae Majoris".
- Omicron_Ursae_Majoris label "Omikron Ursae Majoris".
- Omicron_Ursae_Majoris label "Omikron Ursae Majoris".
- Omicron_Ursae_Majoris label "Омикрон Большой Медведицы".
- Omicron_Ursae_Majoris label "內階一".
- Omicron_Ursae_Majoris sameAs Omikron_Ursae_Majoris.
- Omicron_Ursae_Majoris sameAs Muscida.
- Omicron_Ursae_Majoris sameAs Omicron_Ursae_Majoris.
- Omicron_Ursae_Majoris sameAs Muscida.
- Omicron_Ursae_Majoris sameAs Muscida.
- Omicron_Ursae_Majoris sameAs Omikron_Ursae_Majoris.
- Omicron_Ursae_Majoris sameAs Omicron_Ursae_Majoris.
- Omicron_Ursae_Majoris sameAs m.07zgj9.
- Omicron_Ursae_Majoris sameAs Q956651.
- Omicron_Ursae_Majoris sameAs Q956651.
- Omicron_Ursae_Majoris sameAs Omicron_Ursae_Majoris.
- Omicron_Ursae_Majoris wasDerivedFrom Omicron_Ursae_Majoris?oldid=606320872.
- Omicron_Ursae_Majoris depiction Ursa_Major_IAU.svg.
- Omicron_Ursae_Majoris isPrimaryTopicOf Omicron_Ursae_Majoris.
- Omicron_Ursae_Majoris name "Omicron Ursae Majoris".