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- Theta_Ophiuchi abstract "Theta Ophiuchi (θ Oph, θ Ophiuchi) is a multiple star system in the equatorial constellation of Ophiuchus. It lies on the "right foot" of the serpent-bearer, and is only a little to the southwest of the Kepler's Star, the nova of 1604. According to Richard H. Allen's, Star Names: Their Lore and Meaning (1899), θ Oph together with ξ Oph formed the Sogdian Wajrik "the Magician", the Khorasmian Markhashik "the Serpent-bitten" and with η Oph the Coptic Tshiō, "the Snake", and Aggia, "the Magician". This star has an apparent visual magnitude of +3.26, making it readily visible to the naked eye. Based upon parallax measurements from the Hipparcos mission, it is located at a distance of roughly 436 light-years (134 parsecs) from Earth.Theta Ophiuchi appears to be a triple star system. The brightest component is a spectroscopic binary with an orbital period of 56.71 days and an eccentricity of 0.17. The tertiary component is 5.5 magnitude star with a stellar classification of B5. It is located at an angular separation of 0.15 arcseconds from the binary pair. This system is a proper motion member of the Upper Scorpius sub-group in the Scorpius-Centaurus OB association, the nearest such co-moving association of massive stars to the Sun.The primary component of this system is a variable star of the Beta Cephei type with a short period of just 3h 22m. It has nearly nine times the mass of the Sun and more than six times the Sun's radius. Although only 21 million years old, it has begun to evolve away from the main sequence and has become a subgiant star with a stellar classification of B2 IV. This massive star is radiating around 5,000 times the luminosity of the Sun from its outer atmosphere at an effective temperature of about 22,260 K, giving it the blue-white hue of a B-type star.".
- Theta_Ophiuchi thumbnail Ophiuchus_IAU.svg?width=300.
- Theta_Ophiuchi wikiPageID "9038882".
- Theta_Ophiuchi wikiPageLength "9802".
- Theta_Ophiuchi wikiPageOutDegree "41".
- Theta_Ophiuchi wikiPageRevisionID "680668288".
- Theta_Ophiuchi wikiPageWikiLink Angular_distance.
- Theta_Ophiuchi wikiPageWikiLink Angular_separation.
- Theta_Ophiuchi wikiPageWikiLink Apparent_magnitude.
- Theta_Ophiuchi wikiPageWikiLink Apparent_visual_magnitude.
- Theta_Ophiuchi wikiPageWikiLink Arcsecond.
- Theta_Ophiuchi wikiPageWikiLink B-type_star.
- Theta_Ophiuchi wikiPageWikiLink Beta_Cephei_variable.
- Theta_Ophiuchi wikiPageWikiLink Binary_star.
- Theta_Ophiuchi wikiPageWikiLink Bortle_Dark-Sky_Scale.
- Theta_Ophiuchi wikiPageWikiLink Bortle_scale.
- Theta_Ophiuchi wikiPageWikiLink Bright_Star_Catalogue.
- Theta_Ophiuchi wikiPageWikiLink Category:Bayer_objects.
- Theta_Ophiuchi wikiPageWikiLink Category:Ophiuchus_(constellation).
- Theta_Ophiuchi wikiPageWikiLink Category:Upper_Scorpius.
- Theta_Ophiuchi wikiPageWikiLink Celestial_equator.
- Theta_Ophiuchi wikiPageWikiLink Constellation.
- Theta_Ophiuchi wikiPageWikiLink Cordoba_Durchmusterung.
- Theta_Ophiuchi wikiPageWikiLink Durchmusterung.
- Theta_Ophiuchi wikiPageWikiLink Effective_temperature.
- Theta_Ophiuchi wikiPageWikiLink Henry_Draper_Catalogue.
- Theta_Ophiuchi wikiPageWikiLink Hipparcos.
- Theta_Ophiuchi wikiPageWikiLink Hipparcos_catalogue.
- Theta_Ophiuchi wikiPageWikiLink Keplers_Star.
- Theta_Ophiuchi wikiPageWikiLink Keplers_Supernova.
- Theta_Ophiuchi wikiPageWikiLink Main_sequence.
- Theta_Ophiuchi wikiPageWikiLink Minute_and_second_of_arc.
- Theta_Ophiuchi wikiPageWikiLink Multiple_star_system.
- Theta_Ophiuchi wikiPageWikiLink Ophiuchus.
- Theta_Ophiuchi wikiPageWikiLink Ophiuchus_(constellation).
- Theta_Ophiuchi wikiPageWikiLink Orbital_eccentricity.
- Theta_Ophiuchi wikiPageWikiLink Orbital_period.
- Theta_Ophiuchi wikiPageWikiLink Parallax.
- Theta_Ophiuchi wikiPageWikiLink Proper_motion.
- Theta_Ophiuchi wikiPageWikiLink Richard_Hinckley_Allen.
- Theta_Ophiuchi wikiPageWikiLink Scorpius-Centaurus_Association.
- Theta_Ophiuchi wikiPageWikiLink Scorpius–Centaurus_Association.
- Theta_Ophiuchi wikiPageWikiLink Smithsonian_Astrophysical_Observatory_Star_Catalog.
- Theta_Ophiuchi wikiPageWikiLink Smithsonian_Astrophysical_Observatory_Star_Catalogue.
- Theta_Ophiuchi wikiPageWikiLink Spectroscopic_binary.
- Theta_Ophiuchi wikiPageWikiLink Star_Names.
- Theta_Ophiuchi wikiPageWikiLink Star_Names:_Their_Lore_and_Meaning.
- Theta_Ophiuchi wikiPageWikiLink Star_system.
- Theta_Ophiuchi wikiPageWikiLink Stellar_association.
- Theta_Ophiuchi wikiPageWikiLink Stellar_classification.
- Theta_Ophiuchi wikiPageWikiLink Stellar_evolution.
- Theta_Ophiuchi wikiPageWikiLink Stellar_kinematics.
- Theta_Ophiuchi wikiPageWikiLink Subgiant.
- Theta_Ophiuchi wikiPageWikiLink Subgiant_star.
- Theta_Ophiuchi wikiPageWikiLink Variable_star.
- Theta_Ophiuchi wikiPageWikiLink File:Cercle_rouge_100%25.svg.
- Theta_Ophiuchi wikiPageWikiLink File:Ophiuchus_IAU.svg.
- Theta_Ophiuchi wikiPageWikiLinkText "Theta Ophiuchi".
- Theta_Ophiuchi wikiPageWikiLinkText "θ Oph".
- Theta_Ophiuchi absmagV "–2.4".
- Theta_Ophiuchi ageMyr "21.3".
- Theta_Ophiuchi appmagV "+3.26".
- Theta_Ophiuchi bV "–0.23".
- Theta_Ophiuchi class "B2 IV".
- Theta_Ophiuchi constell Ophiuchus.
- Theta_Ophiuchi constell Ophiuchus_(constellation).
- Theta_Ophiuchi epoch "J2000".
- Theta_Ophiuchi gravity "3.95".
- Theta_Ophiuchi hasPhotoCollection Theta_Ophiuchi.
- Theta_Ophiuchi luminosity "5000".
- Theta_Ophiuchi mass "8.8".
- Theta_Ophiuchi metalFe "0.15".
- Theta_Ophiuchi metalFe "–".
- Theta_Ophiuchi pError "0.17".
- Theta_Ophiuchi parallax "7.48".
- Theta_Ophiuchi propMoDec "–23.94".
- Theta_Ophiuchi propMoRa "–7.37".
- Theta_Ophiuchi radialV "–2".
- Theta_Ophiuchi radius "6.3".
- Theta_Ophiuchi rotationalVelocity "30".
- Theta_Ophiuchi temperature "22260".
- Theta_Ophiuchi uB "–0.86".
- Theta_Ophiuchi variable Beta_Cephei_variable.
- Theta_Ophiuchi wikiPageUsesTemplate Template:Convert.
- Theta_Ophiuchi wikiPageUsesTemplate Template:Reflist.
- Theta_Ophiuchi wikiPageUsesTemplate Template:Starbox_astrometry.
- Theta_Ophiuchi wikiPageUsesTemplate Template:Starbox_begin.
- Theta_Ophiuchi wikiPageUsesTemplate Template:Starbox_catalog.
- Theta_Ophiuchi wikiPageUsesTemplate Template:Starbox_character.
- Theta_Ophiuchi wikiPageUsesTemplate Template:Starbox_detail.
- Theta_Ophiuchi wikiPageUsesTemplate Template:Starbox_end.
- Theta_Ophiuchi wikiPageUsesTemplate Template:Starbox_image.
- Theta_Ophiuchi wikiPageUsesTemplate Template:Starbox_observe.
- Theta_Ophiuchi wikiPageUsesTemplate Template:Stars_of_Ophiuchus.
- Theta_Ophiuchi subject Category:Bayer_objects.
- Theta_Ophiuchi subject Category:Ophiuchus_(constellation).
- Theta_Ophiuchi subject Category:Upper_Scorpius.
- Theta_Ophiuchi hypernym System.
- Theta_Ophiuchi type CelestialBody.
- Theta_Ophiuchi type Place.