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• Theta_Leonis abstract "Theta Leonis (θ Leo, θ Leonis) is a star in the constellation Leo. It has the traditional names Chertan, Chort and Coxa. With an apparent visual magnitude of +3.324 it is visible to the naked eye and forms one of the brighter stars in the constellation. The distance from Earth can be directly determined from parallax measurements, yielding a value of about 165 light-years (51 parsecs).This is a large star with 2.5 times the mass of the Sun. The spectrum matches a stellar classification of A2 V, making this a seemingly typical A-type main sequence star. However, the spectrum shows enhanced absorption lines of metals, marking this as a chemically peculiar Am star. The abundance of elements other than hydrogen and helium, what astronomers term the star's metallicity, appears around 12% higher than in the Sun. It is radiating 141 times the luminosity of the Sun from its outer atmosphere at an effective temperature of 9,350 K, literally giving it a white-hot glow.Theta Leonis is much younger than the Sun, with an estimated age of around 550 million years. It has a moderately high rate of rotation, with a projected rotational velocity of 23 km s−1. Measurements in the infrared band show an excess of emission from the star and its surroundings, suggesting the presence of a circumstellar disk of dust. The temperature of this emission indicates the disk has an orbital radius of 36 AU.".
• Theta_Leonis thumbnail Leo_IAU.svg?width=300.
• Theta_Leonis wikiPageID "3111753".
• Theta_Leonis wikiPageLength "9619".
• Theta_Leonis wikiPageOutDegree "38".
• Theta_Leonis wikiPageRevisionID "677090055".
• Theta_Leonis wikiPageWikiLink A-type_main-sequence_star.
• Theta_Leonis wikiPageWikiLink A-type_main_sequence_star.
• Theta_Leonis wikiPageWikiLink Am_star.
• Theta_Leonis wikiPageWikiLink Apparent_magnitude.
• Theta_Leonis wikiPageWikiLink Apparent_visual_magnitude.
• Theta_Leonis wikiPageWikiLink Arabic.
• Theta_Leonis wikiPageWikiLink Astronomical_Unit.
• Theta_Leonis wikiPageWikiLink Astronomical_unit.
• Theta_Leonis wikiPageWikiLink Beta_Virginis.
• Theta_Leonis wikiPageWikiLink Bonner_Durchmusterung.
• Theta_Leonis wikiPageWikiLink Bright_Star_Catalogue.
• Theta_Leonis wikiPageWikiLink Catalogues_of_Fundamental_Stars.
• Theta_Leonis wikiPageWikiLink Category:A-type_main-sequence_stars.
• Theta_Leonis wikiPageWikiLink Category:Bayer_objects.
• Theta_Leonis wikiPageWikiLink Category:Leo_(constellation).
• Theta_Leonis wikiPageWikiLink Category:Stars_with_proper_names.
• Theta_Leonis wikiPageWikiLink Chinese_language.
• Theta_Leonis wikiPageWikiLink Constellation.
• Theta_Leonis wikiPageWikiLink Delta_Leonis.
• Theta_Leonis wikiPageWikiLink Durchmusterung.
• Theta_Leonis wikiPageWikiLink Earth.
• Theta_Leonis wikiPageWikiLink Effective_temperature.
• Theta_Leonis wikiPageWikiLink Epoch_(astronomy).
• Theta_Leonis wikiPageWikiLink Fifth_Fundamental_Catalogue.
• Theta_Leonis wikiPageWikiLink Harvard_Revised_catalogue.
• Theta_Leonis wikiPageWikiLink Henry_Draper_Catalogue.
• Theta_Leonis wikiPageWikiLink Henry_Draper_catalogue.
• Theta_Leonis wikiPageWikiLink Hipparcos.
• Theta_Leonis wikiPageWikiLink Hipparcos_catalogue.
• Theta_Leonis wikiPageWikiLink Infrared_excess.
• Theta_Leonis wikiPageWikiLink Iota_Leonis.
• Theta_Leonis wikiPageWikiLink J2000.0.
• Theta_Leonis wikiPageWikiLink Latin.
• Theta_Leonis wikiPageWikiLink Leo_(constellation).
• Theta_Leonis wikiPageWikiLink List_of_stars_in_Leo.
• Theta_Leonis wikiPageWikiLink Metallicity.
• Theta_Leonis wikiPageWikiLink Parallax.
• Theta_Leonis wikiPageWikiLink Projected_rotational_velocity.
• Theta_Leonis wikiPageWikiLink Sigma_Leonis.
• Theta_Leonis wikiPageWikiLink Smithsonian_Astrophysical_Observatory.
• Theta_Leonis wikiPageWikiLink Spectrum.
• Theta_Leonis wikiPageWikiLink Star.
• Theta_Leonis wikiPageWikiLink Stellar_classification.
• Theta_Leonis wikiPageWikiLink Stellar_rotation.
• Theta_Leonis wikiPageWikiLink Supreme_Palace_enclosure.
• Theta_Leonis wikiPageWikiLink File:Cercle_rouge_100%25.svg.
• Theta_Leonis wikiPageWikiLink File:Leo_IAU.svg.
• Theta_Leonis wikiPageWikiLinkText "θ Leo".
• Theta_Leonis wikiPageWikiLinkText "Chertan".
• Theta_Leonis wikiPageWikiLinkText "Chort".
• Theta_Leonis wikiPageWikiLinkText "Theta Leonis".
• Theta_Leonis wikiPageWikiLinkText "theta Leonis".
• Theta_Leonis wikiPageWikiLinkText "θ Leo".
• Theta_Leonis wikiPageWikiLinkText "θ Leonis".
• Theta_Leonis wikiPageWikiLinkText "θ".
• Theta_Leonis ageMyr "550".
• Theta_Leonis appmagV "+3.324".
• Theta_Leonis bV "–0.02".
• Theta_Leonis class "A2 V".
• Theta_Leonis constell Leo_(constellation).
• Theta_Leonis epoch Epoch_(astronomy).
• Theta_Leonis epoch J2000.0.
• Theta_Leonis gravity "3.65".
• Theta_Leonis hasPhotoCollection Theta_Leonis.
• Theta_Leonis luminosity "141".
• Theta_Leonis mass "2.5".
• Theta_Leonis metalFe "+0.05".
• Theta_Leonis pError "0.17".
• Theta_Leonis parallax "19.76".
• Theta_Leonis propMoDec "-79.1".
• Theta_Leonis propMoRa "-60.31".
• Theta_Leonis radialV "+7.6".
• Theta_Leonis rotationalVelocity "23".
• Theta_Leonis temperature "9350".
• Theta_Leonis uB "+0.07".
• Theta_Leonis wikiPageUsesTemplate Template:Convert.
• Theta_Leonis wikiPageUsesTemplate Template:Lang-en.
• Theta_Leonis wikiPageUsesTemplate Template:Reflist.
• Theta_Leonis wikiPageUsesTemplate Template:Starbox_astrometry.
• Theta_Leonis wikiPageUsesTemplate Template:Starbox_begin.
• Theta_Leonis wikiPageUsesTemplate Template:Starbox_catalog.
• Theta_Leonis wikiPageUsesTemplate Template:Starbox_character.
• Theta_Leonis wikiPageUsesTemplate Template:Starbox_detail.
• Theta_Leonis wikiPageUsesTemplate Template:Starbox_end.
• Theta_Leonis wikiPageUsesTemplate Template:Starbox_image.
• Theta_Leonis wikiPageUsesTemplate Template:Starbox_observe.
• Theta_Leonis wikiPageUsesTemplate Template:Stars_of_Leo.
• Theta_Leonis wikiPageUsesTemplate Template:Transl.
• Theta_Leonis subject Category:A-type_main-sequence_stars.
• Theta_Leonis subject Category:Bayer_objects.
• Theta_Leonis subject Category:Leo_(constellation).
• Theta_Leonis subject Category:Stars_with_proper_names.
• Theta_Leonis hypernym Star.
• Theta_Leonis type Article.

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