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- Beta_Scorpii abstract "Beta Scorpii (β Sco, β Scorpii) is a multiple star system in the southern zodiac constellation of Scorpius. It has the traditional names Acrab, Akrab or Elacrab, all come from (Arabic: العقرب) al-'Aqrab, the Scorpion, for the whole constellation, as well as Graffias, a name it shares with Xi Scorpii. It was known as 房宿四 (the Fourth star of the Room) in Chinese.Observed through a small telescope, Beta Scorpii appears as a binary star with a separation between the two components of 13.5 arcseconds and a combined apparent magnitude of 2.50. This pair, β1 and β2, form the top branches of the hierarchy of orbiting components in this system. β1 Scorpii, the brighter of the pair, consists of two sub-components, β Sco A and β Sco B, orbiting at an angular separation of 3.9 arcseconds with an orbital period of 610 years. β Sco A is itself a spectroscopic binary with the components β Sco Aa and β Sco Ab separated by 1.42 milliarcseconds and an orbital period of 6.82 days.The second visual component, β2 Scorpii, has two sub-components, β Sco C and β Sco E, orbiting at an angular separation of 0.1328 arcseconds with an orbital period of 39 years. β Sco E is a spectroscopic binary with the components β Sco Ea and β Sco Eb having an orbital period of 10.7 days. This brings the total number of stars in the system to six. There is no D component; this is now an artifact of earlier system models.The two most massive members of the system have the spectrum of B-type main sequence stars. Component C has a stellar classification of B2V. They are both hot stars at least 10 times as massive as our own Sun, and will have short lives. Both are expected to end their stellar evolution with massive Type II supernova explosions.The Beta Scorpii system is a kinematic member of the Upper Scorpius subgroup of the Scorpius-Centaurus Association,a group of thousands of young stars with mean age 11 million years at distance 470 light years (145 parsecs). A recent analysis of the HR diagram position for the most massive star Beta-1 Scorpii A estimates its effective temperature to be 26,240 Kelvin with a luminosity of 19,500 Suns, consistent with an isochronal age of 11 million years and an estimated mass of 12 solar masses.Beta Scorpii is 1.01 degree from the ecliptic and can be occulted by the Moon and, very rarely, by planets. The last occultation by a planet took place on 13 May 1971, by Jupiter.".
- Beta_Scorpii thumbnail Scorpius_constellation_map.svg?width=300.
- Beta_Scorpii wikiPageExternalLink graffias.html.
- Beta_Scorpii wikiPageExternalLink ap090521.html.
- Beta_Scorpii wikiPageID "1522637".
- Beta_Scorpii wikiPageLength "9680".
- Beta_Scorpii wikiPageOutDegree "52".
- Beta_Scorpii wikiPageRevisionID "699117380".
- Beta_Scorpii wikiPageWikiLink Apparent_magnitude.
- Beta_Scorpii wikiPageWikiLink Astronomy_Picture_of_the_Day.
- Beta_Scorpii wikiPageWikiLink B-type_main-sequence_star.
- Beta_Scorpii wikiPageWikiLink Binary_star.
- Beta_Scorpii wikiPageWikiLink Category:B-type_main-sequence_stars.
- Beta_Scorpii wikiPageWikiLink Category:Bayer_objects.
- Beta_Scorpii wikiPageWikiLink Category:Durchmusterung_objects.
- Beta_Scorpii wikiPageWikiLink Category:Flamsteed_objects.
- Beta_Scorpii wikiPageWikiLink Category:HR_objects.
- Beta_Scorpii wikiPageWikiLink Category:Henry_Draper_Catalogue_objects.
- Beta_Scorpii wikiPageWikiLink Category:Hipparcos_objects.
- Beta_Scorpii wikiPageWikiLink Category:Multiple_star_systems.
- Beta_Scorpii wikiPageWikiLink Category:Scorpius_(constellation).
- Beta_Scorpii wikiPageWikiLink Category:Spectroscopic_binaries.
- Beta_Scorpii wikiPageWikiLink Category:Stars_with_proper_names.
- Beta_Scorpii wikiPageWikiLink Category:Upper_Scorpius.
- Beta_Scorpii wikiPageWikiLink Constellation.
- Beta_Scorpii wikiPageWikiLink Ecliptic.
- Beta_Scorpii wikiPageWikiLink Effective_temperature.
- Beta_Scorpii wikiPageWikiLink Epoch_(astronomy).
- Beta_Scorpii wikiPageWikiLink Flag_of_Brazil.
- Beta_Scorpii wikiPageWikiLink Henry_Draper_Catalogue.
- Beta_Scorpii wikiPageWikiLink Hertzsprung–Russell_diagram.
- Beta_Scorpii wikiPageWikiLink Hipparcos.
- Beta_Scorpii wikiPageWikiLink Jupiter.
- Beta_Scorpii wikiPageWikiLink Kelvin.
- Beta_Scorpii wikiPageWikiLink Luminosity.
- Beta_Scorpii wikiPageWikiLink Maranhão.
- Beta_Scorpii wikiPageWikiLink Minute_and_second_of_arc.
- Beta_Scorpii wikiPageWikiLink Moon.
- Beta_Scorpii wikiPageWikiLink Occultation.
- Beta_Scorpii wikiPageWikiLink Planet.
- Beta_Scorpii wikiPageWikiLink Scorpius.
- Beta_Scorpii wikiPageWikiLink Scorpius–Centaurus_Association.
- Beta_Scorpii wikiPageWikiLink Solar_mass.
- Beta_Scorpii wikiPageWikiLink Spectrum.
- Beta_Scorpii wikiPageWikiLink Star_catalogue.
- Beta_Scorpii wikiPageWikiLink Star_system.
- Beta_Scorpii wikiPageWikiLink Stellar_evolution.
- Beta_Scorpii wikiPageWikiLink Sun.
- Beta_Scorpii wikiPageWikiLink Type_II_supernova.
- Beta_Scorpii wikiPageWikiLink USS_Graffias_(AF-29).
- Beta_Scorpii wikiPageWikiLink United_States.
- Beta_Scorpii wikiPageWikiLink Xi_Scorpii.
- Beta_Scorpii wikiPageWikiLink Zodiac.
- Beta_Scorpii wikiPageWikiLink File:Beta_sco_orbits.svg.
- Beta_Scorpii wikiPageWikiLinkText "Acrab".
- Beta_Scorpii wikiPageWikiLinkText "Beta Scorpii C".
- Beta_Scorpii wikiPageWikiLinkText "Beta Scorpii".
- Beta_Scorpii wikiPageWikiLinkText "Beta Scorpionis".
- Beta_Scorpii wikiPageWikiLinkText "Beta_Scorpii".
- Beta_Scorpii wikiPageWikiLinkText "Graffias".
- Beta_Scorpii wikiPageWikiLinkText "Grafias".
- Beta_Scorpii wikiPageWikiLinkText "Grassias".
- Beta_Scorpii wikiPageWikiLinkText "β Sco".
- Beta_Scorpii wikiPageWikiLinkText "β Scorpii".
- Beta_Scorpii wikiPageWikiLinkText "β".
- Beta_Scorpii appmagV "2.62".
- Beta_Scorpii appmagV "4.92".
- Beta_Scorpii bV "–0.08 / –0.02".
- Beta_Scorpii class "B1V + B2V".
- Beta_Scorpii component "HR 5984".
- Beta_Scorpii component "HR 5985".
- Beta_Scorpii constell Scorpius.
- Beta_Scorpii epoch Epoch_(astronomy).
- Beta_Scorpii luminosity "20000".
- Beta_Scorpii mass "10".
- Beta_Scorpii pError "0.78".
- Beta_Scorpii pError "1.17".
- Beta_Scorpii parallax "8.07".
- Beta_Scorpii parallax "8.19".
- Beta_Scorpii propMoDec "–24.04".
- Beta_Scorpii propMoDec "–25.87".
- Beta_Scorpii propMoRa "–5.07".
- Beta_Scorpii propMoRa "–5.20".
- Beta_Scorpii radialV "–1.0".
- Beta_Scorpii radialV "–3.6".
- Beta_Scorpii radius "19".
- Beta_Scorpii rotationalVelocity "100".
- Beta_Scorpii rotationalVelocity "65".
- Beta_Scorpii temperature "22000".
- Beta_Scorpii temperature "27000".
- Beta_Scorpii uB "–0.08 / –0.70".
- Beta_Scorpii wikiPageUsesTemplate Template:DEC.
- Beta_Scorpii wikiPageUsesTemplate Template:Lang-ar.
- Beta_Scorpii wikiPageUsesTemplate Template:Location_mark.
- Beta_Scorpii wikiPageUsesTemplate Template:RA.
- Beta_Scorpii wikiPageUsesTemplate Template:Reflist.
- Beta_Scorpii wikiPageUsesTemplate Template:Starbox_astrometry.
- Beta_Scorpii wikiPageUsesTemplate Template:Starbox_begin.
- Beta_Scorpii wikiPageUsesTemplate Template:Starbox_catalog.
- Beta_Scorpii wikiPageUsesTemplate Template:Starbox_character.