DT Virginis (original) (raw)
DT de la Verge (DT Virginis), també conegut com a Ross 458 AB, és una estrella binària de la constel·lació de la Verge. Les dues estrelles són nanes vermelles de baixa massa, almenys una d'elles és una Estrella fulgurant. Aquest sistema binari té un planeta circumbinari detectat per imatges directes, actualment l'objecte de massa planetària amb l'.
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| dbo:abstract | DT de la Verge (DT Virginis), també conegut com a Ross 458 AB, és una estrella binària de la constel·lació de la Verge. Les dues estrelles són nanes vermelles de baixa massa, almenys una d'elles és una Estrella fulgurant. Aquest sistema binari té un planeta circumbinari detectat per imatges directes, actualment l'objecte de massa planetària amb l'. (ca) DT Virginis, also known as Ross 458, is a binary star system in the constellation of Virgo. It has an apparent visual magnitude of 9.79 and is located at a distance of 37.6 light-years from the Sun. Both of the stars are low-mass red dwarfs with at least one of them being a flare star. This binary system has a circumbinary sub-stellar companion. This star was mentioned as a suspected variable by in 1957. In 1960, O. J. Eggen classified it as a member of the Hyades moving group based on the system's space motion; it is now considered a likely member of the Carina Near Moving Group. Two flares were reported from this star in 1969 by , confirming it as a flare star. It was identified as an astrometric binary in 1994 by W. D. Heintz, who found a period of 14.5 years. The pair were resolved using adaptive optics in 1999. Early mass estimates placed the companion near the substellar limit, and it was initially proposed as a brown dwarf but is now considered late-type red dwarf. The primary member, component A, is an M-type main-sequence star with a stellar classification of M0.5. It is young, magnetically very active star with a high rate of rotation and strong Hα emission. The star experiences star spots that cover 10–15% of the surface It is smaller and less massive than the Sun. The star is radiating just 4.4% of the luminosity of the Sun from its photosphere at an effective temperature of 3,484 K. A distant sub-stellar companion to the binary star system was discovered in 2010 as part of a deep infrared sky survey. This is most likely a T8 spectral type brown dwarf with an estimated rotation period of 6.75±1.58 h. The object varies slightly in brightness, which may be due to patchy clouds. (en) Ross 458 (Gliese 494) es un sistema estelar en la constelación de Virgo de magnitud aparente +9,76.No observable a simple vista, visualmente está situado 1,5º al norte de Vindemiatrix (ε Virginis).Se encuentra a 37 años luz de distancia del Sistema Solar. (es) DT Virginis, denominata anche Ross 458, è un sistema stellare visibile nella costellazione della Vergine. Dista circa 38 anni luce dal sistema solare. Il sistema si compone di una coppia di nane rosse, almeno una delle quali è una variabile BY Draconis, con brillamenti che la classificano anche come variabile UV Ceti. Il sistema inoltre è anche una sorgente di raggi X. Una nana bruna sarebbe la terza componente del sistema, in orbita attorno alla coppia AB. (it) Ross 458 (DT Virginis) – gwiazda podwójna w gwiazdozbiorze Panny, którą tworzy para czerwonych karłów. Znajduje się około 38 lat świetlnych od Ziemi. (pl) DT Virginis, também conhecida como Ross 458 AB, é uma estrela binária na constelação da Virgem. Este sistema binário tem um planeta circumbinário, ele é um objeto com massa-planetária, pelo menos até 2015, com a órbita mais ampla conhecida ao redor de uma estrela binária. (pt) 室女座DT（DT Virginis），或稱為羅斯458AB（Ross 458 AB），是一個位於室女座的聯星系統。該系統擁有一顆以直接攝影方式發現的系外行星。 (zh) |
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| rdfs:comment | DT de la Verge (DT Virginis), també conegut com a Ross 458 AB, és una estrella binària de la constel·lació de la Verge. Les dues estrelles són nanes vermelles de baixa massa, almenys una d'elles és una Estrella fulgurant. Aquest sistema binari té un planeta circumbinari detectat per imatges directes, actualment l'objecte de massa planetària amb l'. (ca) Ross 458 (Gliese 494) es un sistema estelar en la constelación de Virgo de magnitud aparente +9,76.No observable a simple vista, visualmente está situado 1,5º al norte de Vindemiatrix (ε Virginis).Se encuentra a 37 años luz de distancia del Sistema Solar. (es) DT Virginis, denominata anche Ross 458, è un sistema stellare visibile nella costellazione della Vergine. Dista circa 38 anni luce dal sistema solare. Il sistema si compone di una coppia di nane rosse, almeno una delle quali è una variabile BY Draconis, con brillamenti che la classificano anche come variabile UV Ceti. Il sistema inoltre è anche una sorgente di raggi X. Una nana bruna sarebbe la terza componente del sistema, in orbita attorno alla coppia AB. (it) Ross 458 (DT Virginis) – gwiazda podwójna w gwiazdozbiorze Panny, którą tworzy para czerwonych karłów. Znajduje się około 38 lat świetlnych od Ziemi. (pl) DT Virginis, também conhecida como Ross 458 AB, é uma estrela binária na constelação da Virgem. Este sistema binário tem um planeta circumbinário, ele é um objeto com massa-planetária, pelo menos até 2015, com a órbita mais ampla conhecida ao redor de uma estrela binária. (pt) 室女座DT（DT Virginis），或稱為羅斯458AB（Ross 458 AB），是一個位於室女座的聯星系統。該系統擁有一顆以直接攝影方式發現的系外行星。 (zh) DT Virginis, also known as Ross 458, is a binary star system in the constellation of Virgo. It has an apparent visual magnitude of 9.79 and is located at a distance of 37.6 light-years from the Sun. Both of the stars are low-mass red dwarfs with at least one of them being a flare star. This binary system has a circumbinary sub-stellar companion. (en) |
| rdfs:label | DT de la Verge (ca) Ross 458 (es) DT Virginis (en) DT Virginis (it) Ross 458 (pl) DT Virginis (pt) DT Virginis (sv) 室女座DT (zh) |
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