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Theta Cancri, Latinised from θ Cancri, is a multiple star system in the zodiac constellation of Cancer. It is visible to the naked eye as a dim point of light with an apparent visual magnitude of +5.32. The system is located at a distance of approximately 450 light-years away from the Sun, based on parallax, and is drifting further away with a radial velocity of +44 km/s. Since it is near the ecliptic, it can be occulted by the Moon and, very rarely, by planets.

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  • Theta Cancri (in)
  • Theta Cancri (fr)
  • Theta Cancri (it)
  • かに座シータ星 (ja)
  • Theta Cancri (pt)
  • Theta Cancri (en)
  • Тета Рака (ru)
  • Theta Cancri (sv)
  • 鬼宿一 (zh)
rdfs:comment
  • Theta Cancri (θ Cnc / θ Cancri) adalah bintang ganda yang berada di rasi Cancer, 494 tahun cahaya dari Bumi. θ Cancri merupakan bintang raksasa jingga tipe K (orange K-type giant) dengan magnitudo 5.33. (in)
  • Theta Cancri (θ Cnc / θ Cancri) è una stella gigante arancione di magnitudine 5,37 situata nella costellazione del Cancro. Dista 415 anni luce dal sistema solare. (it)
  • かに座θ星 (θ Cnc / θ Cancri) は、かに座に位置する連星系である。 この星は、橙色のK型巨星に分類される。黄道面の近くにあるため、月や稀に惑星による掩蔽が観測されることがある。掩蔽の際の光度曲線の観測より、かに座θ星はそれぞれ+6.4等級の2つの恒星からなる近接連星であることが明らかとなった。 (ja)
  • Theta Cancri (31 Cancri) é uma estrela na direção da constelação de Cancer. Possui uma ascensão reta de 08h 31m 35.77s e uma declinação de +18° 05′ 40.4″. Sua magnitude aparente é igual a 5.33. Considerando sua distância de 494 anos-luz em relação à Terra, sua magnitude absoluta é igual a −0.57. Pertence à classe espectral K5III. (pt)
  • Тета Рака (θ Рака, лат. theta Cancri, 31 Рака) — двойная звезда, которая находится в созвездии Рака на расстоянии приблизительно 494 световых лет от нас. Главный компонент, θ Рака А, — оранжевый гигант класса К. Массивнее Солнца в 4.2 раза, радиус — в 23 раза больше солнечного. Светимость мощнее солнечной в 144.6 раза, температура поверхности нагрета до 4100-4250 К. (ru)
  • Theta Cancri (θ Cancri förkortat Theta Cnc, θ Cnc), som är stjärnans Bayer-beteckning, är en multippelstjärna, i mellersta delen av stjärnbilden Kräftan. Den har en skenbar magnitud av 5,32 och är synlig för blotta ögat där ljusföroreningar ej förekommer. Konstellationen beräknas befinna sig på ett avstånd av ca 410 ljusår (ca 127 parsek) från solen. Eftersom den ligger nära ekliptikan kan den ockulteras av månen och, mycket sällan, av planeter. (sv)
  • 鬼宿一(Theta Cancri,拉丁化的名稱是θ Cancri)是位於黃道星座巨蟹座個多星系統。它是肉眼可見的一個暗淡光點,視星等為+5.32。基於視差的觀測,這個系統距離太陽大約450光年之遙,並且正在以+44km/s的徑向速度遠離太陽。由於它靠近黃道,因此可以被月亮掩蔽 ,但被行星掩蔽則很罕見。 主星鬼宿一A,是顆K型巨星,其恆星分類為K5 III,已經耗盡其的氫氣供應,然後冷卻並膨脹。目前,它的周長已經是太陽的40倍。它正以3,955 K的有效溫度輻射出353倍的太陽光度。 在中國天文學,鬼是一個星群,它包括鬼宿一(巨蟹座θ)、鬼宿二(巨蟹座η)、鬼宿三(巨蟹座γ)、和鬼宿四(巨蟹座δ)。 巨蟹座θ是鬼的第一顆星,因此它也是該星官的主要恆星。 (zh)
  • Theta Cancri, Latinised from θ Cancri, is a multiple star system in the zodiac constellation of Cancer. It is visible to the naked eye as a dim point of light with an apparent visual magnitude of +5.32. The system is located at a distance of approximately 450 light-years away from the Sun, based on parallax, and is drifting further away with a radial velocity of +44 km/s. Since it is near the ecliptic, it can be occulted by the Moon and, very rarely, by planets. (en)
  • Theta Cancri (θ Cancri / θ Cnc) est une étoile binaire de la constellation du Cancer. Sa magnitude apparente combinée est de 5,33. D'après la mesure de sa parallaxe annuelle par le satellite Gaia, elle est distante d'environ 132 pc (∼431 a.l.) de la Terre. En astronomie chinoise, elle fait partie de la loge lunaire Yugui, qui forme un petit quadrilatère entourant l'amas ouvert M44, θ Cancri en formant le coin sud-ouest. Theta Cancri est une binaire à occultations. Ses deux composantes sont de magnitude +6,4. Le système se présente comme une géante rouge de type spectral K5III. (fr)
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