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- Theta_Carinae abstract "Theta Carinae (θ Car, θ Carinae) is a star in the southern constellation of Carina. With an apparent visual magnitude of 2.76, it is the brightest star in the open star cluster IC 2602. It marks the northeastern end of the Diamond Cross asterism. Parallax measurements from the Hipparcos mission place this star at a distance of about 460 light-years (140 parsecs) from Earth.In Chinese, 南船 (Nán Chuán), meaning Southern Boat, refers to an asterism consisting of θ Carinae, V337 Carinae, PP Carinae, β Carinae and ω Carinae. Consequently, θ Carinae itself is known as 南船三 (Nán Chuán sān, English: the Third Star of Southern Boat.)The stellar classification of this star is B0.5 Vp, which indicates this is a B-type main sequence star that is generating energy at its core through the nuclear fusion of hydrogen. The 'p' suffix means it displays peculiar features in its spectrum, which have been observed in both the optical and ultraviolet band. This might be explained by a magnetic field, yet no such measurable field has been observed. Theta Carinae is actually a single-lined spectroscopic binary with a period of 2.2 days; the shortest known orbital period among massive stars. The close orbit means that a mass transfer between the two components may have occurred, which could explain the peculiarities of the spectrum.The primary component in this system is a blue straggler, which is a type of star that is created by the interaction between two or more stars. Most likely the source of this mass transfer was the secondary member of the system, and what is now the primary star was probably once the secondary component. At an estimated age of 4 million years, this star is much younger than the age of the surrounding IC 2602 cluster, which is consistent with it being a straggler. At present the primary star has about 15 times the mass of the Sun and five times the Sun's radius. It has an intensely hot outer envelope that is radiating more than 25,000 the Sun's luminosity at an effective temperature of 31,000 K, giving it a blue-white glow. When the primary reaches the age of around 11 million years, it will expand to the point where it will begin to transfer part of its mass back to its companion. Little is known about this secondary component, but it may be an F-type star with a luminosity less than 1% of the primary.".
- Theta_Carinae thumbnail Carina_IAU.svg?width=300.
- Theta_Carinae wikiPageExternalLink crosses.htm.
- Theta_Carinae wikiPageID "5063615".
- Theta_Carinae wikiPageRevisionID "602295268".
- Theta_Carinae appmagV "2.76".
- Theta_Carinae bV "–0.22".
- Theta_Carinae class "B0.5 Vp".
- Theta_Carinae component "θ Car A".
- Theta_Carinae constell Carina_(constellation).
- Theta_Carinae eccentricity "0.129".
- Theta_Carinae epoch Epoch_(astronomy).
- Theta_Carinae gravity "4.2".
- Theta_Carinae hasPhotoCollection Theta_Carinae.
- Theta_Carinae k "18.93".
- Theta_Carinae luminosity "25673".
- Theta_Carinae pError "0.21".
- Theta_Carinae parallax "7.16".
- Theta_Carinae periarg "81.8".
- Theta_Carinae propMoDec "+12.03".
- Theta_Carinae propMoRa "–18.36".
- Theta_Carinae radialV "+24".
- Theta_Carinae radius "5.1".
- Theta_Carinae rotationalVelocity "108".
- Theta_Carinae temperature "31000".
- Theta_Carinae uB "–1.00".
- Theta_Carinae subject Category:B-type_main-sequence_stars.
- Theta_Carinae subject Category:Bayer_objects.
- Theta_Carinae subject Category:Carina_(constellation).
- Theta_Carinae type B-typeMainSequenceStars.
- Theta_Carinae type BayerObjects.
- Theta_Carinae type CelestialBody109239740.
- Theta_Carinae type NaturalObject100019128.
- Theta_Carinae type Object100002684.
- Theta_Carinae type PhysicalEntity100001930.
- Theta_Carinae type Star109444100.
- Theta_Carinae type Whole100003553.
- Theta_Carinae type CelestialBody.
- Theta_Carinae type Star.
- Theta_Carinae type PhysicalBody.
- Theta_Carinae comment "Theta Carinae (θ Car, θ Carinae) is a star in the southern constellation of Carina. With an apparent visual magnitude of 2.76, it is the brightest star in the open star cluster IC 2602. It marks the northeastern end of the Diamond Cross asterism.".
- Theta_Carinae label "Theta Carinae".
- Theta_Carinae label "Theta Carinae".
- Theta_Carinae label "Theta Carinae".
- Theta_Carinae label "Theta Carinae".
- Theta_Carinae label "Theta Carinae".
- Theta_Carinae label "Theta Carinae".
- Theta_Carinae label "Тета Киля".
- Theta_Carinae label "南船三".
- Theta_Carinae sameAs Theta_Carinae.
- Theta_Carinae sameAs Theta_Carinae.
- Theta_Carinae sameAs Theta_Carinae.
- Theta_Carinae sameAs Theta_Carinae.
- Theta_Carinae sameAs 용골자리_세타.
- Theta_Carinae sameAs Theta_Carinae.
- Theta_Carinae sameAs Theta_Carinae.
- Theta_Carinae sameAs m.0d11nv.
- Theta_Carinae sameAs Q1202466.
- Theta_Carinae sameAs Q1202466.
- Theta_Carinae sameAs Theta_Carinae.
- Theta_Carinae wasDerivedFrom Theta_Carinae?oldid=602295268.
- Theta_Carinae depiction Carina_IAU.svg.
- Theta_Carinae isPrimaryTopicOf Theta_Carinae.
- Theta_Carinae name "Theta Carinae".
