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- Gamma_Cephei abstract "Gamma Cephei (abbreviated γ Cephei, γ Cep) is a binary star system approximately 45 light-years away in the constellation of Cepheus. It has a traditional Arabic name variously spelled as Errai, Er Rai or Alrai. The primary (designated Gamma Cephei A) is a stellar class K1III-IV orange subgiant star; it has a red dwarf companion (Gamma Cephei B). An extrasolar planet (designated Gamma Cephei Ab, later named Tadmor) is believed to be orbiting the primary.Gamma Cephei is the naked-eye star that will succeed Polaris as the Earth's northern pole star, due to the precession of the equinoxes. It will be closer to the northern celestial pole than Polaris around 3000 CE and will make its closest approach around 4000 CE. The 'title' will pass to ι Cephei some time around 5200 CE.Gamma Cephei has an apparent magnitude of 3.22, nearly all of which is accounted for by Gamma Cephei A. The primary is about 6.6 billion years old (based on Fe/H metallicity). and is on its first ascent off the main sequence. Since 1943, the spectrum of this star has served as one of the stable anchor points by which other stars are classified.Gamma Cephei B has a mass approximately 0.409 times that of the Sun. It is probably a red dwarf of class M4, 6.2 degrees of magnitude fainter than the primary. It is assumed to be of similar age to its primary.".
- Gamma_Cephei thumbnail Cepheus_constellation_map.png?width=300.
- Gamma_Cephei wikiPageExternalLink gamcep.html.
- Gamma_Cephei wikiPageExternalLink errai2.htm.
- Gamma_Cephei wikiPageExternalLink errai.shtml.
- Gamma_Cephei wikiPageExternalLink 1009.html.
- Gamma_Cephei wikiPageID "345687".
- Gamma_Cephei wikiPageLength "12586".
- Gamma_Cephei wikiPageOutDegree "71".
- Gamma_Cephei wikiPageRevisionID "697419445".
- Gamma_Cephei wikiPageWikiLink 23_Cassiopeiae.
- Gamma_Cephei wikiPageWikiLink 5th_millennium.
- Gamma_Cephei wikiPageWikiLink 6th_millennium.
- Gamma_Cephei wikiPageWikiLink 73_Draconis.
- Gamma_Cephei wikiPageWikiLink Anthony_Lawton.
- Gamma_Cephei wikiPageWikiLink Apparent_magnitude.
- Gamma_Cephei wikiPageWikiLink Arabic.
- Gamma_Cephei wikiPageWikiLink Astronomical_unit.
- Gamma_Cephei wikiPageWikiLink Axial_precession.
- Gamma_Cephei wikiPageWikiLink Bayer_designation.
- Gamma_Cephei wikiPageWikiLink Beta_Ophiuchi.
- Gamma_Cephei wikiPageWikiLink Binary_star.
- Gamma_Cephei wikiPageWikiLink Bright_Star_Catalogue.
- Gamma_Cephei wikiPageWikiLink Catalogues_of_Fundamental_Stars.
- Gamma_Cephei wikiPageWikiLink Category:Gamma_Cephei.
- Gamma_Cephei wikiPageWikiLink Category:K-type_subgiants.
- Gamma_Cephei wikiPageWikiLink Category:M-type_main-sequence_stars.
- Gamma_Cephei wikiPageWikiLink Category:Northern_pole_stars.
- Gamma_Cephei wikiPageWikiLink Category:Stars_with_proper_names.
- Gamma_Cephei wikiPageWikiLink Celestial_pole.
- Gamma_Cephei wikiPageWikiLink Cepheus_(constellation).
- Gamma_Cephei wikiPageWikiLink Chinese_language.
- Gamma_Cephei wikiPageWikiLink Constellation.
- Gamma_Cephei wikiPageWikiLink Coplanarity.
- Gamma_Cephei wikiPageWikiLink Durchmusterung.
- Gamma_Cephei wikiPageWikiLink Eta_Draconis.
- Gamma_Cephei wikiPageWikiLink Exoplanet.
- Gamma_Cephei wikiPageWikiLink Gamma_Cephei_Ab.
- Gamma_Cephei wikiPageWikiLink Gliese_777.
- Gamma_Cephei wikiPageWikiLink Henry_Draper_Catalogue.
- Gamma_Cephei wikiPageWikiLink Hipparcos.
- Gamma_Cephei wikiPageWikiLink International_Astronomical_Union.
- Gamma_Cephei wikiPageWikiLink Iota_Cephei.
- Gamma_Cephei wikiPageWikiLink Iota_Draconis.
- Gamma_Cephei wikiPageWikiLink Iota_Horologii.
- Gamma_Cephei wikiPageWikiLink Light-year.
- Gamma_Cephei wikiPageWikiLink Main_sequence.
- Gamma_Cephei wikiPageWikiLink McDonald_Observatory.
- Gamma_Cephei wikiPageWikiLink P_Wright.
- Gamma_Cephei wikiPageWikiLink Palmyra.
- Gamma_Cephei wikiPageWikiLink Polaris.
- Gamma_Cephei wikiPageWikiLink Pole_star.
- Gamma_Cephei wikiPageWikiLink Purple_Forbidden_enclosure.
- Gamma_Cephei wikiPageWikiLink Radial_velocity.
- Gamma_Cephei wikiPageWikiLink Red_dwarf.
- Gamma_Cephei wikiPageWikiLink Semi-major_axis.
- Gamma_Cephei wikiPageWikiLink Semitic_people.
- Gamma_Cephei wikiPageWikiLink Smithsonian_Astrophysical_Observatory_Star_Catalog.
- Gamma_Cephei wikiPageWikiLink Spectrum.
- Gamma_Cephei wikiPageWikiLink Star_catalogue.
- Gamma_Cephei wikiPageWikiLink Stellar_classification.
- Gamma_Cephei wikiPageWikiLink Subgiant.
- Gamma_Cephei wikiPageWikiLink Sun.
- Gamma_Cephei wikiPageWikiLink Syria.
- Gamma_Cephei wikiPageWikiLink Theta_Draconis.
- Gamma_Cephei wikiPageWikiLink UNESCO.
- Gamma_Cephei wikiPageWikiLink Upsilon_Draconis.
- Gamma_Cephei wikiPageWikiLink World_Heritage_Site.
- Gamma_Cephei wikiPageWikiLink Zeta_Draconis.
- Gamma_Cephei wikiPageWikiLink File:Cepheus_constellation_map.png.
- Gamma_Cephei wikiPageWikiLinkText "Alrai".
- Gamma_Cephei wikiPageWikiLinkText "Errai".
- Gamma_Cephei wikiPageWikiLinkText "Gamma Cephei A".
- Gamma_Cephei wikiPageWikiLinkText "Gamma Cephei".
- Gamma_Cephei wikiPageWikiLinkText "γ Cep".
- Gamma_Cephei wikiPageWikiLinkText "γ Cephei".
- Gamma_Cephei absmagV "2.51".
- Gamma_Cephei ageGyr "6.6".
- Gamma_Cephei appmagV "3.22".
- Gamma_Cephei axis "1.467".
- Gamma_Cephei axisUnitless "20.18".
- Gamma_Cephei bV "1.03".
- Gamma_Cephei class "K1IVe".
- Gamma_Cephei class "M4V".
- Gamma_Cephei component "Gamma Cephei A".
- Gamma_Cephei component "Gamma Cephei B".
- Gamma_Cephei constell Cepheus_(constellation).
- Gamma_Cephei eccentricity "0.115".
- Gamma_Cephei eccentricity "0.4112".
- Gamma_Cephei epe "Gamma+Cephei".
- Gamma_Cephei epoch "J2000.0".
- Gamma_Cephei exoplanet Gamma_Cephei_Ab.
- Gamma_Cephei inclination "119.3".
- Gamma_Cephei mass "0.409".
- Gamma_Cephei mass "1.4".
- Gamma_Cephei mass "≥1.60 ± 0.13".
- Gamma_Cephei name "B".
- Gamma_Cephei noHeading "y".
- Gamma_Cephei node "18.04".
- Gamma_Cephei nsted "Gamma+Cephei".
