HD 20781 (original) (raw)
HD 20781 is a star which is part of a wide binary system with HD 20782. The companion star has a very large angular separation of 252 arcsec, corresponding to 9080 AU at the distance of HD 20782. Both stars possess their own planetary systems in S type orbits, with a total of five known planets around both stars. This is the first known example of planets being found orbiting both components of a wide binary system. HD 20781 has no noticeable starspot activity.
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| dbo:abstract | HD 20781 is a star which is part of a wide binary system with HD 20782. The companion star has a very large angular separation of 252 arcsec, corresponding to 9080 AU at the distance of HD 20782. Both stars possess their own planetary systems in S type orbits, with a total of five known planets around both stars. This is the first known example of planets being found orbiting both components of a wide binary system. HD 20781 has no noticeable starspot activity. (en) HD 20781 est une étoile qui fait partie d'un grand système binaire avec HD 20782. Les deux étoiles possèdent leurs propres systèmes planétaires en orbite de type S. C'était la première fois que des planètes étaient trouvées dans deux composantes d'un grand système binaire. Les exoplanètes HD 20781 b et HD 20781 c découvertes en 2011 sont en orbite autour de cette étoile. (fr) HD 20781 è una stella di 8ª magnitudine distante circa 116 anni luce dalla Terra, situata nella costellazione della Fornace. Fa parte di un sistema binario largo assieme a HD 20782; entrambe le stelle, nane gialle di tipo solare, ospitano un sistema planetario. Ha una grande separazione angolare dalla compagna, di 252 secondi d'arco, che corrispondono a 9080 UA alla distanza in cui si trova il sistema. Due pianeti extrasolari sono stati annunciati attorno a HD 20781 nel 2011; si tratta di giganti gassosi simili a Nettuno che orbitano piuttosto in prossimità della stella, tanto da essere definiti pianeti nettuniani caldi. Nel 2019 sono stati scoperti altri due pianeti del tipo super Terra che orbitano più internamente rispetto ai primi due. (it) HD 20781 (HIP 15526) — звезда в созвездии Печь. Находится на расстоянии около 115 св. лет от Солнца. Вокруг звезды обращаются, как минимум, четыре планеты. (ru) HD 20781 – gwiazda w gwiazdozbiorze Pieca, oddalona od Słońca o około 115 lat świetlnych. (pl) HD 20781 é uma estrela que é parte de um amplo sistema binário com HD 20782. Ambas as estrelas possuem seus próprios sistemas planetários em órbitas tipo S. Esta é a primeira vez que planetas foram encontrados em ambas os componentes de um amplo sistema binário. (pt) HD 20781 är en vid dubbelstjärna belägen i den norradelen av stjärnbilden Ugnen. Den har en skenbar magnitud av ca 8,48 och kräver ett mindre teleskop för att kunna observeras. Baserat på parallaxmätning inom Hipparcosuppdraget på ca 28,3 mas, beräknas den befinna sig på ett avstånd på ca 115 ljusår (ca 35 parsek) från solen. Den rör sig bort från solen med en heliocentrisk radialhastighet på ca 40 km/s. (sv) HD 20781是一個視星等8等的黃矮星，位於天爐座，距離地球117光年。 (zh) |
| dbo:wikiPageExternalLink | http://exoplanet.eu/catalog/hd_20781_b/%7C http://exoplanet.eu/catalog/hd_20781_c/%7C |
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| dbp:absmagV | 5.700000 (xsd:double) |
| dbp:appmagV | 8.480000 (xsd:double) |
| dbp:bV | 0.820000 (xsd:double) |
| dbp:class | K0V (en) |
| dbp:constell | dbr:Fornax |
| dbp:epoch | J2000.0 (en) |
| dbp:exoplanet | dbr:HD_20781_c dbr:HD_20781_b dbr:HD_20781_d dbr:HD_20781_e |
| dbp:gravity | 4.370000 (xsd:double) |
| dbp:luminosity | 0.490000 (xsd:double) |
| dbp:mass | 0.700000 (xsd:double) |
| dbp:metalFe | −0.11 (en) |
| dbp:pError | 0.023900 (xsd:double) |
| dbp:parallax | 27.812300 (xsd:double) |
| dbp:rotation | 4043520.0 |
| dbp:rotationalVelocity | 1.100000 (xsd:double) |
| dbp:temperature | 5256 (xsd:integer) |
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| gold:hypernym | dbr:Star |
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| rdfs:comment | HD 20781 is a star which is part of a wide binary system with HD 20782. The companion star has a very large angular separation of 252 arcsec, corresponding to 9080 AU at the distance of HD 20782. Both stars possess their own planetary systems in S type orbits, with a total of five known planets around both stars. This is the first known example of planets being found orbiting both components of a wide binary system. HD 20781 has no noticeable starspot activity. (en) HD 20781 est une étoile qui fait partie d'un grand système binaire avec HD 20782. Les deux étoiles possèdent leurs propres systèmes planétaires en orbite de type S. C'était la première fois que des planètes étaient trouvées dans deux composantes d'un grand système binaire. Les exoplanètes HD 20781 b et HD 20781 c découvertes en 2011 sont en orbite autour de cette étoile. (fr) HD 20781 (HIP 15526) — звезда в созвездии Печь. Находится на расстоянии около 115 св. лет от Солнца. Вокруг звезды обращаются, как минимум, четыре планеты. (ru) HD 20781 – gwiazda w gwiazdozbiorze Pieca, oddalona od Słońca o około 115 lat świetlnych. (pl) HD 20781 é uma estrela que é parte de um amplo sistema binário com HD 20782. Ambas as estrelas possuem seus próprios sistemas planetários em órbitas tipo S. Esta é a primeira vez que planetas foram encontrados em ambas os componentes de um amplo sistema binário. (pt) HD 20781 är en vid dubbelstjärna belägen i den norradelen av stjärnbilden Ugnen. Den har en skenbar magnitud av ca 8,48 och kräver ett mindre teleskop för att kunna observeras. Baserat på parallaxmätning inom Hipparcosuppdraget på ca 28,3 mas, beräknas den befinna sig på ett avstånd på ca 115 ljusår (ca 35 parsek) från solen. Den rör sig bort från solen med en heliocentrisk radialhastighet på ca 40 km/s. (sv) HD 20781是一個視星等8等的黃矮星，位於天爐座，距離地球117光年。 (zh) HD 20781 è una stella di 8ª magnitudine distante circa 116 anni luce dalla Terra, situata nella costellazione della Fornace. Fa parte di un sistema binario largo assieme a HD 20782; entrambe le stelle, nane gialle di tipo solare, ospitano un sistema planetario. Ha una grande separazione angolare dalla compagna, di 252 secondi d'arco, che corrispondono a 9080 UA alla distanza in cui si trova il sistema. Nel 2019 sono stati scoperti altri due pianeti del tipo super Terra che orbitano più internamente rispetto ai primi due. (it) |
| rdfs:label | HD 20781 (en) HD 20781 (it) HD 20781 (fr) HD 20781 (pl) HD 20781 (ru) HD 20781 (pt) HD 20781 (sv) HD 20781 (zh) |
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| foaf:name | HD20781 (en) |
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