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V343 Carinae
Star in the constellation Carina From Wikipedia, the free encyclopedia
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V343 Carinae is a blue-white star or star system in the southern constellation of Carina. It has the Bayer designation d Carinae, while V343 Carinae is a variable star designation. The star is visible to the naked eye with an apparent visual magnitude of 4.31.[3] The distance to this object is approximately 1,440 light years based on parallax. It is drifting further away with a radial velocity of +13 km/s.[3]
This star was originally thought to be a Beta Cephei variable and a suspected eclipsing binary[9] with an orbital period of 133.92 days. It is now considered as probably constant.[10][5] Measurements indicate that at most it is a microvariable star with an amplitude of 0.0041 in visual magnitude and a period of 0.42029 cycles per day.[11] Eggleton and Tokovinin (2008) catalogued this as a single star, albeit with some uncertainty.[12] However, Chini et al. (2012) listed it as a single-lined spectroscopic binary system.[13]
The visible component of V343 Carinae has a stellar classification of B1.5III,[4] matching a massive blue giant. It has 12.5[6] times the mass of the Sun and is an estimated 16[6] million years old. The star is radiating 6,323[3] times the Sun's luminosity from its photosphere at an effective temperature of 27,600 K.[7] It has a visual magnitude 13.3 companion at an angular separation of 16.4″ along a position angle of 339°, as of 2010.[14]
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