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- Theta_Muscae abstract "Theta Muscae (θ Mus) is a star in the southern constellation Musca ("the Fly") with an apparent magnitude of 5.66. In reality, it is a remote triple star system, the primary component of which is a carbon-sequence Wolf–Rayet star. This is a variety of highly-luminous hot blue star that has blown off its hydrogen envelope and is emitting heavier elements, in this case carbon, amid a strong stellar wind. Theta Muscae is the second-brightest such star in the sky after Regor in Vela. θ Mus is beyond the reach of parallax, but has been estimated as around 7,500 light-years (470 million astronomical units) from Earth. While cataloging the stars in the far-southern sky, French explorer and astronomer Nicolas Louis de Lacaille gave the star its Bayer designation in 1756.Optical binaryTo small telescopes, Theta Muscae appears as a double star, with a blue-cream brighter star and a blue-white companion of magnitude 7.3 some 5.3 arcseconds away. The companion, Theta Muscae B, is not part of the triple system but an optical double which happens to be along the same line of sight.Triple systemThe triple star is composed of two parts: a spectroscopic binary system composed of the Wolf–Rayet star (spectral type: WC5 or 6) and an O-type main sequence star (spectral type: O6 or O7) that orbit each other every 19 days and a blue supergiant (spectral type: O9.5/B0Iab) set about 46 milliarcseconds apart from them. If the system's estimated distance from Earth is accurate, the binary stars are about 0.5 AU apart and the supergiant about 100 AU apart from them. All three are highly luminous: combined, they are likely to be over a million times as luminous as the Sun. The stellar winds of the Wolf–Rayet star and blue supergiant are so powerful that they form a shock front where they meet. The front produces X-rays.NebulaA surrounding emission nebula is now thought to be a supernova remnant.".
- Theta_Muscae thumbnail Musca_IAU.svg?width=300.
- Theta_Muscae wikiPageID "41138201".
- Theta_Muscae wikiPageRevisionID "602290903".
- Theta_Muscae constell Musca.
- Theta_Muscae name "Theta Muscae".
- Theta_Muscae type "WC5/6, O6/7V, O9.5/B0Iab".
- Theta_Muscae subject Category:Bayer_objects.
- Theta_Muscae subject Category:Musca_(constellation).
- Theta_Muscae subject Category:Wolf–Rayet_stars.
- Theta_Muscae comment "Theta Muscae (θ Mus) is a star in the southern constellation Musca ("the Fly") with an apparent magnitude of 5.66. In reality, it is a remote triple star system, the primary component of which is a carbon-sequence Wolf–Rayet star. This is a variety of highly-luminous hot blue star that has blown off its hydrogen envelope and is emitting heavier elements, in this case carbon, amid a strong stellar wind. Theta Muscae is the second-brightest such star in the sky after Regor in Vela.".
- Theta_Muscae label "Theta Muscae".
- Theta_Muscae label "Theta Muscae".
- Theta_Muscae label "蒼蠅座θ".
- Theta_Muscae sameAs Theta_Muscae.
- Theta_Muscae sameAs m.0zbws0y.
- Theta_Muscae sameAs Q10332964.
- Theta_Muscae sameAs Q10332964.
- Theta_Muscae wasDerivedFrom Theta_Muscae?oldid=602290903.
- Theta_Muscae depiction Musca_IAU.svg.
- Theta_Muscae isPrimaryTopicOf Theta_Muscae.
