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- Gamma_Persei abstract "Gamma Persei (Gamma Per, γ Persei, γ Per) is a binary star system in the constellation Perseus. The combined apparent visual magnitude of the pair is +2.9, making it the fourth brightest member of the constellation. The distance to this system has been measured using the parallax technique, giving an estimate of roughly 243 light-years (75 parsecs) with a 4% margin of error. About 4° to the north of Gamma Persei is the radiance point for the annual Perseid meteor shower.This is a wide eclipsing binary system with an orbital period of 5,329.8 days (14.6 years). This eclipse was first observed in 1990 and lasted for two weeks. During an eclipse, the primary passes in front of the secondary, causing the magnitude of the system to decrease by 0.55. The primary component of this system is a giant star with a stellar classification of G9 III. It has a projected rotational velocity of 50.0 km s−1 and a lengthy estimated rotation period of 14.6 years. The classification of the secondary remains tentative, with assignments of A3 V and A2(III).Mass estimates for the two stars remain disparate. Using speckle interferometery, McAlister (1982) obtained mass estimates of 4.73 M☉ for the primary and 2.75 M☉ for the secondary, where M☉ is the mass of the Sun. He noted that the mass estimate was too high for the given classification of the primary. Martin and Mignard (1998) determined masses for both components based on data from the Hipparcos mission: 5.036 ± 0.951 M☉ for the primary and 2.295 ± 0.453 M☉ for the secondary. They admit that the high inclination of the orbit resulted in a large margin of error. Prieto and Lambert (1999) came up with a mass estimate of 3.81 M☉ for the primary, while Pizzolato and Maggio (2000) obtained 4.34 M☉. Ling et al. (2001) obtained estimates of 2.7 M☉ for the primary and 1.65 M☉ for the secondary, while Kaler (2001) obtained 2.5 and 1.9, respectively.".
- Gamma_Persei thumbnail Perseus_IAU.svg?width=300.
- Gamma_Persei wikiPageExternalLink al_thurayya.html.
- Gamma_Persei wikiPageID "8316497".
- Gamma_Persei wikiPageLength "11718".
- Gamma_Persei wikiPageOutDegree "44".
- Gamma_Persei wikiPageRevisionID "653617159".
- Gamma_Persei wikiPageWikiLink 48_Persei.
- Gamma_Persei wikiPageWikiLink Alpha_Persei.
- Gamma_Persei wikiPageWikiLink Apparent_magnitude.
- Gamma_Persei wikiPageWikiLink Apparent_visual_magnitude.
- Gamma_Persei wikiPageWikiLink Binary_star.
- Gamma_Persei wikiPageWikiLink Boss_General_Catalogue.
- Gamma_Persei wikiPageWikiLink Bright_Star_Catalogue.
- Gamma_Persei wikiPageWikiLink Catalog_of_Components_of_Double_and_Multiple_Stars.
- Gamma_Persei wikiPageWikiLink Catalogues_of_Fundamental_Stars.
- Gamma_Persei wikiPageWikiLink Category:Bayer_objects.
- Gamma_Persei wikiPageWikiLink Category:Perseus_(constellation).
- Gamma_Persei wikiPageWikiLink Chinese_language.
- Gamma_Persei wikiPageWikiLink Constellation.
- Gamma_Persei wikiPageWikiLink Delta_Persei.
- Gamma_Persei wikiPageWikiLink Eclipsing_binary.
- Gamma_Persei wikiPageWikiLink Epoch_(astronomy).
- Gamma_Persei wikiPageWikiLink Eta_Persei.
- Gamma_Persei wikiPageWikiLink Fifth_Fundamental_Catalogue.
- Gamma_Persei wikiPageWikiLink Giant_star.
- Gamma_Persei wikiPageWikiLink HD_27084.
- Gamma_Persei wikiPageWikiLink Henry_Draper_Catalogue.
- Gamma_Persei wikiPageWikiLink Henry_Draper_catalogue.
- Gamma_Persei wikiPageWikiLink Hipparcos.
- Gamma_Persei wikiPageWikiLink Hipparcos_catalogue.
- Gamma_Persei wikiPageWikiLink Index_Catalogue_of_Visual_Double_Stars.
- Gamma_Persei wikiPageWikiLink J2000.0.
- Gamma_Persei wikiPageWikiLink Margin_of_error.
- Gamma_Persei wikiPageWikiLink Mu_Persei.
- Gamma_Persei wikiPageWikiLink PPM_Star_Catalogue.
- Gamma_Persei wikiPageWikiLink Parallax.
- Gamma_Persei wikiPageWikiLink Perseid_meteor_shower.
- Gamma_Persei wikiPageWikiLink Perseids.
- Gamma_Persei wikiPageWikiLink Perseus_(constellation).
- Gamma_Persei wikiPageWikiLink Projected_rotational_velocity.
- Gamma_Persei wikiPageWikiLink Psi_Persei.
- Gamma_Persei wikiPageWikiLink Sigma_Persei.
- Gamma_Persei wikiPageWikiLink Smithsonian_Astrophysical_Observatory_Star_Catalog.
- Gamma_Persei wikiPageWikiLink Solar_mass.
- Gamma_Persei wikiPageWikiLink Star_catalogue.
- Gamma_Persei wikiPageWikiLink Stellar_classification.
- Gamma_Persei wikiPageWikiLink Stellar_rotation.
- Gamma_Persei wikiPageWikiLink Stomach_(Chinese_constellation).
- Gamma_Persei wikiPageWikiLink Washington_Double_Star_Catalog.
- Gamma_Persei wikiPageWikiLink File:Cercle_rouge_100%25.svg.
- Gamma_Persei wikiPageWikiLink File:Perseus_IAU.svg.
- Gamma_Persei wikiPageWikiLinkText "Gamma Persei".
- Gamma_Persei wikiPageWikiLinkText "γ Per A".
- Gamma_Persei wikiPageWikiLinkText "γ Per B".
- Gamma_Persei wikiPageWikiLinkText "γ Per".
- Gamma_Persei wikiPageWikiLinkText "γ Persei".
- Gamma_Persei absmagV "–1.50".
- Gamma_Persei appmagV "2.93".
- Gamma_Persei axis "0.144".
- Gamma_Persei bV "+0.70".
- Gamma_Persei class "G9 III + A2–A3".
- Gamma_Persei component "γ Per A".
- Gamma_Persei component "γ Per B".
- Gamma_Persei constell Perseus_(constellation).
- Gamma_Persei eccentricity "0.785".
- Gamma_Persei epoch Epoch_(astronomy).
- Gamma_Persei epoch J2000.0.
- Gamma_Persei gravity "2.83".
- Gamma_Persei hasPhotoCollection Gamma_Persei.
- Gamma_Persei inclination "90.9".
- Gamma_Persei mass "1.65".
- Gamma_Persei mass "2.7".
- Gamma_Persei metalFe "–0.19".
- Gamma_Persei node "244.1".
- Gamma_Persei pError "0.51".
- Gamma_Persei parallax "13.41".
- Gamma_Persei periarg "170".
- Gamma_Persei periastron "1991.08".
- Gamma_Persei period "14.6".
- Gamma_Persei propMoDec "–5.92".
- Gamma_Persei propMoRa "+0.51".
- Gamma_Persei radialV "+2.5".
- Gamma_Persei rotation "4.6224E8".
- Gamma_Persei rotationalVelocity "50".
- Gamma_Persei temperature "5170".
- Gamma_Persei temperature "7895".
- Gamma_Persei uB "+0.45".
- Gamma_Persei wikiPageUsesTemplate Template:Convert.
- Gamma_Persei wikiPageUsesTemplate Template:Lang-en.
- Gamma_Persei wikiPageUsesTemplate Template:Reflist.
- Gamma_Persei wikiPageUsesTemplate Template:Solar_mass.
- Gamma_Persei wikiPageUsesTemplate Template:Starbox_astrometry.
- Gamma_Persei wikiPageUsesTemplate Template:Starbox_begin.
- Gamma_Persei wikiPageUsesTemplate Template:Starbox_catalog.
- Gamma_Persei wikiPageUsesTemplate Template:Starbox_character.
- Gamma_Persei wikiPageUsesTemplate Template:Starbox_detail.
- Gamma_Persei wikiPageUsesTemplate Template:Starbox_end.
- Gamma_Persei wikiPageUsesTemplate Template:Starbox_image.
- Gamma_Persei wikiPageUsesTemplate Template:Starbox_observe.