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- Eta_Cephei abstract "Eta Cephei (η Cep, η Cephei) is a star in the northern circumpolar constellation of Cepheus. It shares the name Al Kidr with θ Cep, although the meaning of this name is unknown. This star, along with α Cep (Alderamin) and β Cep (Alfirk), were identified as Al Kawākib al Firḳ (الكوكب الفرق), meaning "the Stars of The Flock" by Ulug Beg. With an apparent visual magnitude of 3.4, this is a third magnitude star that, according to the Bortle Dark-Sky Scale, is readily visible to the naked eye. Parallax measurements put it at a distance of 46.53 light-years (14.27 parsecs) from Earth.In Chinese, 天鈎 (Tiān Gōu), meaning Celestial Hook, refers to an asterism consisting of η Cephei, 4 Cephei, HD 194298, θ Cephei, α Cephei, ξ Cephei, 26 Cephei, ι Cephei and ο Cephei. Consequently, η Cephei itself is known as 天鈎四 (Tiān Gōu sì, English: the Fourth Star of Celestial Hook.).Eta Cephei is a subgiant star with a stellar classification of K0 IV, which indicates it is exhausting the supply of hydrogen at its core and is in the process of evolving into a giant star. With 1.6 times the Sun's mass, at an age of 2.5 billion years it has reached a radius four times larger than the Sun and a luminosity ten times greater. It is radiating this energy from its outer atmosphere at an effective temperature of 4,950 K, giving it the orange-hued glow of a K-type star. Eta Cephei has a high proper motion across the celestial sphere and a large peculiar velocity of 112 km s–1.".
- Eta_Cephei thumbnail Cepheus_IAU.svg?width=300.
- Eta_Cephei wikiPageID "9783739".
- Eta_Cephei wikiPageRevisionID "602160087".
- Eta_Cephei absmagV "2.631".
- Eta_Cephei ageGyr "2.5".
- Eta_Cephei appmagV "3.426".
- Eta_Cephei bV "+0.918".
- Eta_Cephei class "K0 IV".
- Eta_Cephei constell Cepheus_(constellation).
- Eta_Cephei eccentricity "?0.17".
- Eta_Cephei epoch Epoch_(astronomy).
- Eta_Cephei exoplanet "b".
- Eta_Cephei gravity "3.41".
- Eta_Cephei hasPhotoCollection Eta_Cephei.
- Eta_Cephei mass "1.6".
- Eta_Cephei mass "≥0.64".
- Eta_Cephei metalFe "–0.32".
- Eta_Cephei pError "0.11".
- Eta_Cephei parallax "70.1".
- Eta_Cephei period "163.57".
- Eta_Cephei periodUnit "day".
- Eta_Cephei propMoDec "+818.02".
- Eta_Cephei propMoRa "+86.50".
- Eta_Cephei radialV "–87.55 ± 0.11".
- Eta_Cephei rotationalVelocity "6.79".
- Eta_Cephei semimajor "0.638".
- Eta_Cephei temperature "4950".
- Eta_Cephei uB "+0.613".
- Eta_Cephei subject Category:Bayer_objects.
- Eta_Cephei subject Category:Cepheus_(constellation).
- Eta_Cephei subject Category:Hypothetical_planetary_systems.
- Eta_Cephei subject Category:K-type_subgiants.
- Eta_Cephei subject Category:Objects_within_100_ly_of_Earth.
- Eta_Cephei subject Category:Solar-type_stars.
- Eta_Cephei type Artifact100021939.
- Eta_Cephei type HypotheticalPlanetarySystems.
- Eta_Cephei type Instrumentality103575240.
- Eta_Cephei type Object100002684.
- Eta_Cephei type PhysicalEntity100001930.
- Eta_Cephei type System104377057.
- Eta_Cephei type Whole100003553.
- Eta_Cephei type CelestialBody.
- Eta_Cephei type Star.
- Eta_Cephei type PhysicalBody.
- Eta_Cephei comment "Eta Cephei (η Cep, η Cephei) is a star in the northern circumpolar constellation of Cepheus. It shares the name Al Kidr with θ Cep, although the meaning of this name is unknown. This star, along with α Cep (Alderamin) and β Cep (Alfirk), were identified as Al Kawākib al Firḳ (الكوكب الفرق), meaning "the Stars of The Flock" by Ulug Beg. With an apparent visual magnitude of 3.4, this is a third magnitude star that, according to the Bortle Dark-Sky Scale, is readily visible to the naked eye.".
- Eta_Cephei label "Eta Cephei".
- Eta_Cephei label "Eta Cephei".
- Eta_Cephei label "Eta Cephei".
- Eta_Cephei label "Eta Cephei".
- Eta_Cephei label "Eta Cephei".
- Eta_Cephei label "天鉤四".
- Eta_Cephei sameAs Eta_Cephei.
- Eta_Cephei sameAs Eta_Cephei.
- Eta_Cephei sameAs Eta_Cephei.
- Eta_Cephei sameAs Eta_Cephei.
- Eta_Cephei sameAs Eta_Cephei.
- Eta_Cephei sameAs Eta_Cephei.
- Eta_Cephei sameAs m.02ps2gq.
- Eta_Cephei sameAs Q2411106.
- Eta_Cephei sameAs Q2411106.
- Eta_Cephei sameAs Eta_Cephei.
- Eta_Cephei wasDerivedFrom Eta_Cephei?oldid=602160087.
- Eta_Cephei depiction Cepheus_IAU.svg.
- Eta_Cephei isPrimaryTopicOf Eta_Cephei.
- Eta_Cephei name "Eta Cephei".