HD 102117 (original) (raw)
HD 102117 ist ein 137 Lichtjahre entfernter, sonnenähnlicher Stern im Sternbild Zentaur. Obwohl seine Oberflächentemperatur niedriger ist als jene der Sonne, ist der Stern heller als diese. HD 102117 wird von mindestens einem Planeten (Exoplaneten) umkreist. * *
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| dbo:abstract | HD 102117 ist ein 137 Lichtjahre entfernter, sonnenähnlicher Stern im Sternbild Zentaur. Obwohl seine Oberflächentemperatur niedriger ist als jene der Sonne, ist der Stern heller als diese. HD 102117 wird von mindestens einem Planeten (Exoplaneten) umkreist. * * (de) HD 102117 or Uklun /ˈʌklən/ is a star in the southern constellation of Centaurus. With an apparent visual magnitude of 7.47, it is too dim to be seen without binoculars or a small telescope. It is located at a distance of approximately 129 light years from the Sun based on parallax. HD 102117 is drifting further away with a radial velocity of +50 km/s, having come to within 43.9 light-years some 692,000 years ago. It has one known planet. The stellar classification of HD 102117 is G6V, which matches the spectrum of an ordinary G-type main-sequence star. It is roughly five billion years old and is spinning with a projected rotational velocity of 0.9 km/s. The star shows only a low level of chromospheric activity and is photometrically stable, meaning it doesn't vary significantly in brightness. It appears metal-enriched, showing a higher abundance of heavy elements compared to the Sun. (en) HD 102117 ou Uklun est une étoile naine (classe de luminosité V) jaune (classe spectrale G6) située à une distance d'environ 39,6 pc (∼129 a.l.) du Soleil, dans de la constellation australe du Centaure. De magnitude apparente 7,45 dans le spectre visible, elle n'est pas observable à l'œil nu. D'une masse comparable à celle du Soleil (1.03 ± 0.05 M☉), elle est l'objet primaire d'un système planétaire dont l'unique objet secondaire connu à ce jour (mai 2015) est HD 102117 b, une planète confirmée, également nommée Leklsullun. Celle-ci a été détectée par HARPS, le spectrographe-échelle équipant le télescope de 3,6 mètres de l'Observatoire européen austral à La Silla au Chili. Sa découverte a été annoncée le 8 février 2005 à Aspen. Elle a été découverte indépendamment, en 2004, par l'Anglo-Australian Planet Search. (fr) HD 102117は、ケンタウルス座の方角に約130光年の位置にある、7等級の恒星である。 (ja) HD 102117 (Uklun) – gwiazda w gwiazdozbiorze Centaura, odległa o 129 lat świetlnych od Słońca. W 2005 roku odkryto krążącą wokół niej planetę HD 102117 b (Leklsullun). Jest to żółty karzeł, gwiazda typu widmowego G6 o masie podobnej do Słońca, ale starsza od niego. (pl) HD 102117 é uma estrela na Constelação de Centaurus. Tem uma magnitude aparente visual de 7,45, sendo fraca demais para ser vista a olho nu. De acordo com dados de paralaxe, do segundo lançamento do catálogo Gaia, está localizada a uma distância de 129 anos-luz (39,6 parsecs) da Terra. Sua magnitude absoluta é igual a 4,35. HD 102117 é classificada com um tipo espectral de G6V, o que significa que é uma estrela de classe G da sequência principal. Apesar de ser um pouco mais fria que o Sol com uma temperatura efetiva de 5 730 K, é maior e mais brilhante, com 107% da massa solar, 121% do raio solar e 140% da luminosidade solar, o que pode indicar que é mais evoluída. Sua idade é estimada em 6,1 bilhões de anos. A estrela tem uma metalicidade alta, com cerca de duas vezes a abundância de ferro do Sol, e um baixo nível de atividade cromosférica. Em 2005 foi descoberto um planeta extrassolar orbitando HD 102117, anunciado independentemente por dois grupos, do Anglo-Australian Planet Search e do HARPS. Ambos utilizaram espectroscopia Doppler para detectar as variações na velocidade radial da estrela conforme ela orbita o centro de massa do sistema. Foram encontrados parâmetros orbitais muito parecidos, mas as medições do HARPS possuem uma precisão maior, com um desvio médio de apenas 0,9 m/s em relação à melhor solução. O planeta tem uma massa mínima de 17% da massa de Júpiter e orbita próximo da estrela em uma órbita pouco excêntrica com um período curto de 20,81 dias e um semieixo maior de 0,15 UA. (pt) Uklun eller HD 102117 är en ensam stjärna belägen i den södra delen av stjärnbilden Kentauren. Den har en skenbar magnitud av ca 7,47 och kräver åtminstone en stark handkikare eller ett mindre teleskop för att kunna observeras. Baserat på parallaxmätning inom Hipparcosuppdraget på ca 25,2 mas, beräknas den befinna sig på ett avstånd på ca 129 ljusår (ca 40 parsek) från solen. Den rör sig bort från solen med en heliocentrisk radialhastighet på ca 50 km/s. (sv) HD 102117 или Аклэн\/ˈʌklən/ — звезда седьмой звёздной величины, жёлтый карлик спектрального класса G6V в созвездии Центавра на расстоянии около 130 световых лет от Земли. Вокруг звезды обращается, как минимум, одна экзопланета называемая Лэклсалэн/lɛkəlsʌlən/. (ru) HD 102117是一颗137光年外半人马座内类似太阳的恒星。尽管它的温度比太阳低，但亮度与太阳类似。HD 102117至少有一颗行星（太阳系外行星）围绕它公转。 (zh) |
| dbo:wikiPageExternalLink | http://media4.obspm.fr/exoplanets/base/etoile.php%3Fnom=HD+102117 https://web.archive.org/web/20120304130302/http:/media4.obspm.fr/exoplanets/base/etoile.php%3Fnom=HD+102117 |
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| dbp:appmagV | 7.470000 (xsd:double) |
| dbp:class | G6V (en) |
| dbp:constell | dbr:Centaurus_(constellation) |
| dbp:eccentricity | 0.121000 (xsd:double) |
| dbp:epe | HD+102117 (en) |
| dbp:epoch | J2000 (en) |
| dbp:exoplanet | dbr:HD_102117_b |
| dbp:luminosity | 1.540000 (xsd:double) |
| dbp:mass | 0.172000 (xsd:double) |
| dbp:pError | 0.040900 (xsd:double) |
| dbp:parallax | 25.236900 (xsd:double) |
| dbp:period | 20.813300 (xsd:double) |
| dbp:propMoDec | –70.439 (en) |
| dbp:propMoRa | –63.555 (en) |
| dbp:radius | 1.270000 (xsd:double) |
| dbp:semimajor | 0.153200 (xsd:double) |
| dbp:simbad | HD+102117 (en) |
| dbp:variable | Constant (en) |
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| rdfs:comment | HD 102117 ist ein 137 Lichtjahre entfernter, sonnenähnlicher Stern im Sternbild Zentaur. Obwohl seine Oberflächentemperatur niedriger ist als jene der Sonne, ist der Stern heller als diese. HD 102117 wird von mindestens einem Planeten (Exoplaneten) umkreist. * * (de) HD 102117は、ケンタウルス座の方角に約130光年の位置にある、7等級の恒星である。 (ja) HD 102117 (Uklun) – gwiazda w gwiazdozbiorze Centaura, odległa o 129 lat świetlnych od Słońca. W 2005 roku odkryto krążącą wokół niej planetę HD 102117 b (Leklsullun). Jest to żółty karzeł, gwiazda typu widmowego G6 o masie podobnej do Słońca, ale starsza od niego. (pl) Uklun eller HD 102117 är en ensam stjärna belägen i den södra delen av stjärnbilden Kentauren. Den har en skenbar magnitud av ca 7,47 och kräver åtminstone en stark handkikare eller ett mindre teleskop för att kunna observeras. Baserat på parallaxmätning inom Hipparcosuppdraget på ca 25,2 mas, beräknas den befinna sig på ett avstånd på ca 129 ljusår (ca 40 parsek) från solen. Den rör sig bort från solen med en heliocentrisk radialhastighet på ca 50 km/s. (sv) HD 102117 или Аклэн\/ˈʌklən/ — звезда седьмой звёздной величины, жёлтый карлик спектрального класса G6V в созвездии Центавра на расстоянии около 130 световых лет от Земли. Вокруг звезды обращается, как минимум, одна экзопланета называемая Лэклсалэн/lɛkəlsʌlən/. (ru) HD 102117是一颗137光年外半人马座内类似太阳的恒星。尽管它的温度比太阳低，但亮度与太阳类似。HD 102117至少有一颗行星（太阳系外行星）围绕它公转。 (zh) HD 102117 or Uklun /ˈʌklən/ is a star in the southern constellation of Centaurus. With an apparent visual magnitude of 7.47, it is too dim to be seen without binoculars or a small telescope. It is located at a distance of approximately 129 light years from the Sun based on parallax. HD 102117 is drifting further away with a radial velocity of +50 km/s, having come to within 43.9 light-years some 692,000 years ago. It has one known planet. (en) HD 102117 ou Uklun est une étoile naine (classe de luminosité V) jaune (classe spectrale G6) située à une distance d'environ 39,6 pc (∼129 a.l.) du Soleil, dans de la constellation australe du Centaure. De magnitude apparente 7,45 dans le spectre visible, elle n'est pas observable à l'œil nu. (fr) HD 102117 é uma estrela na Constelação de Centaurus. Tem uma magnitude aparente visual de 7,45, sendo fraca demais para ser vista a olho nu. De acordo com dados de paralaxe, do segundo lançamento do catálogo Gaia, está localizada a uma distância de 129 anos-luz (39,6 parsecs) da Terra. Sua magnitude absoluta é igual a 4,35. (pt) |
| rdfs:label | HD 102117 (de) HD 102117 (fr) HD 102117 (en) HD 102117 (ja) HD 102117 (pl) HD 102117 (pt) HD 102117 (sv) HD 102117 (ru) HD 102117 (zh) |
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