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• Alpha_Circini abstract "Alpha Circini (α Cir, α Circini) is a variable star in the faint, southern, circumpolar constellation of Circinus. At an apparent visual magnitude of 3.19, it is the brightest star in the constellation and can be readily seen with the naked eye from the southern hemisphere. Parallax measurements of this star yield an estimated distance of 54.0 light-years (16.6 parsecs) from the Earth.This star belongs to a class of variables known as rapidly oscillating Ap stars. It oscillates with multiple, non-radial pulsation cycles and a dominant cycle of 6.8 minutes. The spectrum shows peculiar features caused by chemical stratification of the outer atmosphere. It displays a moderate deficiency of carbon, nitrogen and oxygen, while there is an overabundance of chromium (Cr). The stellar classification of A7 Vp SrCrEu indicates that this is a main sequence star with enhanced levels of strontium (Sr), chromium, and europium (Eu) in its atmosphere (compared to a typical star like the Sun).The mass of Alpha Circini is about 150% to 170% the mass of the Sun and it has double the Sun's radius, while the luminosity is more than 10 times that of the Sun. The effective temperature of the outer envelope is about 7,500 K, giving it the white hue typical of A-type stars. It is rotating with a period of 4.5 days and the pole is inclined by about 37 ± 4° to the line of sight from the Earth.Based upon its location and motion through space, Alpha Circini is a candidate member of a stellar kinematic group known as the Beta Pictoris moving group. This group shares a common origin and has an estimated age of about 12 million years. At the birth of this group, Alpha Circini was estimated to be located at a distance of about 91 ly (28 pc) from the center of the assemblage.".
• Alpha_Circini thumbnail Circinus_IAU.svg?width=300.
• Alpha_Circini wikiPageID "4360690".
• Alpha_Circini wikiPageLength "10008".
• Alpha_Circini wikiPageOutDegree "36".
• Alpha_Circini wikiPageRevisionID "707903964".
• Alpha_Circini wikiPageWikiLink Apparent_magnitude.
• Alpha_Circini wikiPageWikiLink Beta_Pictoris_moving_group.
• Alpha_Circini wikiPageWikiLink Bright_Star_Catalogue.
• Alpha_Circini wikiPageWikiLink Category:A-type_main-sequence_stars.
• Alpha_Circini wikiPageWikiLink Category:Bayer_objects.
• Alpha_Circini wikiPageWikiLink Category:Circinus_(constellation).
• Alpha_Circini wikiPageWikiLink Category:Flamsteed_objects.
• Alpha_Circini wikiPageWikiLink Category:HR_objects.
• Alpha_Circini wikiPageWikiLink Category:Henry_Draper_Catalogue_objects.
• Alpha_Circini wikiPageWikiLink Category:Hipparcos_objects.
• Alpha_Circini wikiPageWikiLink Category:Peculiar_stars.
• Alpha_Circini wikiPageWikiLink Category:Suspected_variables.
• Alpha_Circini wikiPageWikiLink Chromium.
• Alpha_Circini wikiPageWikiLink Circinus.
• Alpha_Circini wikiPageWikiLink Circumpolar_constellation.
• Alpha_Circini wikiPageWikiLink Earth.
• Alpha_Circini wikiPageWikiLink Effective_temperature.
• Alpha_Circini wikiPageWikiLink Epoch_(astronomy).
• Alpha_Circini wikiPageWikiLink Henry_Draper_Catalogue.
• Alpha_Circini wikiPageWikiLink Hipparcos.
• Alpha_Circini wikiPageWikiLink International_Celestial_Reference_System.
• Alpha_Circini wikiPageWikiLink Main_sequence.
• Alpha_Circini wikiPageWikiLink Parallax.
• Alpha_Circini wikiPageWikiLink Rapidly_oscillating_Ap_star.
• Alpha_Circini wikiPageWikiLink Smithsonian_Astrophysical_Observatory_Star_Catalog.
• Alpha_Circini wikiPageWikiLink Solar_mass.
• Alpha_Circini wikiPageWikiLink Spectrum.
• Alpha_Circini wikiPageWikiLink Stellar_classification.
• Alpha_Circini wikiPageWikiLink Stellar_kinematics.
• Alpha_Circini wikiPageWikiLink Strontium.
• Alpha_Circini wikiPageWikiLink Variable_star.
• Alpha_Circini wikiPageWikiLink File:Cercle_rouge_100%25.svg.
• Alpha_Circini wikiPageWikiLink File:Circinus_IAU.svg.
• Alpha_Circini wikiPageWikiLinkText "Alpha Circini".
• Alpha_Circini wikiPageWikiLinkText "α Cir".
• Alpha_Circini wikiPageWikiLinkText "α Circini".
• Alpha_Circini age "~12 million".
• Alpha_Circini appmagV "3.19".
• Alpha_Circini bV "+0.24".
• Alpha_Circini class "A7 Vp SrCrEu".
• Alpha_Circini constell Circinus.
• Alpha_Circini epoch Epoch_(astronomy).
• Alpha_Circini equinox "J2000.0".
• Alpha_Circini gravity "4.1".
• Alpha_Circini luminosity "10.51".
• Alpha_Circini mass "1.5".
• Alpha_Circini metalFe "0.13".
• Alpha_Circini pError "0.14".
• Alpha_Circini parallax "60.35".
• Alpha_Circini propMoDec "−233.51".
• Alpha_Circini propMoRa "−192.53".
• Alpha_Circini radialV "+7.2".
• Alpha_Circini radius "1.967".
• Alpha_Circini rotation "4.479".
• Alpha_Circini rotation "days".
• Alpha_Circini rotationalVelocity "13".
• Alpha_Circini temperature "7500".
• Alpha_Circini uB "+0.12".
• Alpha_Circini wikiPageUsesTemplate Template:Citation_needed.
• Alpha_Circini wikiPageUsesTemplate Template:Convert.
• Alpha_Circini wikiPageUsesTemplate Template:DEC.
• Alpha_Circini wikiPageUsesTemplate Template:Nearest_star_systems.
• Alpha_Circini wikiPageUsesTemplate Template:RA.
• Alpha_Circini wikiPageUsesTemplate Template:Reflist.
• Alpha_Circini wikiPageUsesTemplate Template:Starbox_astrometry.
• Alpha_Circini wikiPageUsesTemplate Template:Starbox_begin.
• Alpha_Circini wikiPageUsesTemplate Template:Starbox_catalog.
• Alpha_Circini wikiPageUsesTemplate Template:Starbox_character.
• Alpha_Circini wikiPageUsesTemplate Template:Starbox_detail.
• Alpha_Circini wikiPageUsesTemplate Template:Starbox_end.
• Alpha_Circini wikiPageUsesTemplate Template:Starbox_image.
• Alpha_Circini wikiPageUsesTemplate Template:Starbox_observe.
• Alpha_Circini wikiPageUsesTemplate Template:Starbox_reference.
• Alpha_Circini wikiPageUsesTemplate Template:Stars_of_Circinus.
• Alpha_Circini subject Category:A-type_main-sequence_stars.
• Alpha_Circini subject Category:Bayer_objects.
• Alpha_Circini subject Category:Circinus_(constellation).
• Alpha_Circini subject Category:Flamsteed_objects.
• Alpha_Circini subject Category:HR_objects.
• Alpha_Circini subject Category:Henry_Draper_Catalogue_objects.
• Alpha_Circini subject Category:Hipparcos_objects.
• Alpha_Circini subject Category:Peculiar_stars.
• Alpha_Circini subject Category:Suspected_variables.
• Alpha_Circini hypernym Star.
• Alpha_Circini type CelestialBody.
• Alpha_Circini type Place.
• Alpha_Circini type Star.
• Alpha_Circini type Catalogue.
• Alpha_Circini type Location.
• Alpha_Circini type Place.
• Alpha_Circini type Thing.
• Alpha_Circini comment "Alpha Circini (α Cir, α Circini) is a variable star in the faint, southern, circumpolar constellation of Circinus. At an apparent visual magnitude of 3.19, it is the brightest star in the constellation and can be readily seen with the naked eye from the southern hemisphere. Parallax measurements of this star yield an estimated distance of 54.0 light-years (16.6 parsecs) from the Earth.This star belongs to a class of variables known as rapidly oscillating Ap stars.".
• Alpha_Circini label "Alpha Circini".
• Alpha_Circini sameAs Q1366241.

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