Matches in DBpedia 2016-04 for { <http://dbpedia.org/resource/Pi_Scorpii> ?p ?o }
- Pi_Scorpii abstract "Pi Scorpii is a triple star system in the southern constellation Scorpius. With a combined apparent magnitude of 2.9, it can be easily seen with the naked eye. Parallax measurements yield an estimated distance of around 590 light-years (180 parsecs) from the Earth.The name Pi Scorpii was assigned to this star by the German astronomer Johann Bayer in 1603. In 1712, it received the catalogue identifier 6 Scorpii with the publication of the star catalogue of English astronomer John Flamsteed. The binary nature of this star remained unknown until 1899, when it was announced by American astronomer Edward Charles Pickering. Two years later, an orbital period of 1.571 days was found by American astronomer Solon Irving Bailey, but it would not be until 1927 that the orbit of this spectroscopic binary was determined by Russian astronomer Otto Struve and American astrophysicist Christian T. Elvey.The main components of this system form an eclipsing binary of the Beta Lyrae type. Both its members are hot, B-type main sequence stars with a blue-white hue. They display an ellipsoidal variation of 0.03 in magnitude. The two stars are rotating rapidly, with projected rotational velocities of 108 and 87 km s−1, respectively. Their orbital period is 1.57 days and they are separated by an estimated distance of only 15 solar radii along a circular orbit. The binary system is orbited by a smaller, more distant companion, which has an apparent magnitude of +12.2. This component is separated from the pair by 50 arcseconds, putting it at least 7000 Astronomical Units away.The Pi 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 primary star Pi Scorpii A estimates its effective temperature to be 25,230 Kelvin with a luminosity of 21,900 Suns, consistent with an isochronal age of 12-14 million years and an estimated mass of 12-13 solar masses.".
- Pi_Scorpii thumbnail Scorpius_IAU.svg?width=300.
- Pi_Scorpii wikiPageID "2664126".
- Pi_Scorpii wikiPageLength "8396".
- Pi_Scorpii wikiPageOutDegree "42".
- Pi_Scorpii wikiPageRevisionID "651229618".
- Pi_Scorpii wikiPageWikiLink Apparent_magnitude.
- Pi_Scorpii wikiPageWikiLink Astronomical_unit.
- Pi_Scorpii wikiPageWikiLink Beta_Lyrae_variable.
- Pi_Scorpii wikiPageWikiLink Binary_star.
- Pi_Scorpii wikiPageWikiLink Category:B-type_main-sequence_stars.
- Pi_Scorpii wikiPageWikiLink Category:Bayer_objects.
- Pi_Scorpii wikiPageWikiLink Category:Beta_Lyrae_variables.
- Pi_Scorpii wikiPageWikiLink Category:Scorpius_(constellation).
- Pi_Scorpii wikiPageWikiLink Category:Triple_star_systems.
- Pi_Scorpii wikiPageWikiLink Category:Upper_Scorpius.
- Pi_Scorpii wikiPageWikiLink Christian_T._Elvey.
- Pi_Scorpii wikiPageWikiLink Constellation.
- Pi_Scorpii wikiPageWikiLink Earth.
- Pi_Scorpii wikiPageWikiLink Edward_Charles_Pickering.
- Pi_Scorpii wikiPageWikiLink Effective_temperature.
- Pi_Scorpii wikiPageWikiLink Henry_Draper_Catalogue.
- Pi_Scorpii wikiPageWikiLink Hertzsprung–Russell_diagram.
- Pi_Scorpii wikiPageWikiLink Hipparcos.
- Pi_Scorpii wikiPageWikiLink Johann_Bayer.
- Pi_Scorpii wikiPageWikiLink John_Flamsteed.
- Pi_Scorpii wikiPageWikiLink Kelvin.
- Pi_Scorpii wikiPageWikiLink Luminosity.
- Pi_Scorpii wikiPageWikiLink Minute_and_second_of_arc.
- Pi_Scorpii wikiPageWikiLink Orbital_period.
- Pi_Scorpii wikiPageWikiLink Otto_Struve.
- Pi_Scorpii wikiPageWikiLink Parallax.
- Pi_Scorpii wikiPageWikiLink Scorpius.
- Pi_Scorpii wikiPageWikiLink Scorpius–Centaurus_Association.
- Pi_Scorpii wikiPageWikiLink Solar_mass.
- Pi_Scorpii wikiPageWikiLink Solar_radius.
- Pi_Scorpii wikiPageWikiLink Solon_Irving_Bailey.
- Pi_Scorpii wikiPageWikiLink Star_catalogue.
- Pi_Scorpii wikiPageWikiLink Star_system.
- Pi_Scorpii wikiPageWikiLink Stellar_classification.
- Pi_Scorpii wikiPageWikiLink Stellar_rotation.
- Pi_Scorpii wikiPageWikiLink File:Cercle_rouge_100%25.svg.
- Pi_Scorpii wikiPageWikiLink File:Scorpius_IAU.svg.
- Pi_Scorpii wikiPageWikiLinkText "Pi Scorpii".
- Pi_Scorpii wikiPageWikiLinkText "π Sco".
- Pi_Scorpii wikiPageWikiLinkText "π".
- Pi_Scorpii ageMyr ",".
- Pi_Scorpii ageMyr "12".
- Pi_Scorpii ageMyr "15.4".
- Pi_Scorpii appmagV "2.89".
- Pi_Scorpii axisUnitless "About 0.07 AU".
- Pi_Scorpii bV "–0.187".
- Pi_Scorpii class "B1 V + B2 V".
- Pi_Scorpii component "π Sco A".
- Pi_Scorpii component "π Sco B".
- Pi_Scorpii constell Scorpius.
- Pi_Scorpii eccentricity "0".
- Pi_Scorpii epoch "J2000".
- Pi_Scorpii inclination "About 42".
- Pi_Scorpii k "124.1".
- Pi_Scorpii k "196.1".
- Pi_Scorpii luminosity "21900".
- Pi_Scorpii mass "12.5".
- Pi_Scorpii pError "0.64".
- Pi_Scorpii parallax "5.57".
- Pi_Scorpii periodUnitless "0.43200000000000005".
- Pi_Scorpii propMoDec "–26.83".
- Pi_Scorpii propMoRa "–11.42".
- Pi_Scorpii radialV "–3".
- Pi_Scorpii radius "4".
- Pi_Scorpii radius "5".
- Pi_Scorpii rotation "100".
- Pi_Scorpii rotationalVelocity "108".
- Pi_Scorpii rotationalVelocity "87".
- Pi_Scorpii temperature "25230".
- Pi_Scorpii uB "–0.918".
- Pi_Scorpii variable "Eclipsing binary".
- Pi_Scorpii wikiPageUsesTemplate Template:Citation_needed.
- Pi_Scorpii wikiPageUsesTemplate Template:Convert.
- Pi_Scorpii wikiPageUsesTemplate Template:DEC.
- Pi_Scorpii wikiPageUsesTemplate Template:RA.
- Pi_Scorpii wikiPageUsesTemplate Template:Reflist.
- Pi_Scorpii wikiPageUsesTemplate Template:Starbox_astrometry.
- Pi_Scorpii wikiPageUsesTemplate Template:Starbox_begin.
- Pi_Scorpii wikiPageUsesTemplate Template:Starbox_catalog.
- Pi_Scorpii wikiPageUsesTemplate Template:Starbox_character.
- Pi_Scorpii wikiPageUsesTemplate Template:Starbox_detail.
- Pi_Scorpii wikiPageUsesTemplate Template:Starbox_end.
- Pi_Scorpii wikiPageUsesTemplate Template:Starbox_image.
- Pi_Scorpii wikiPageUsesTemplate Template:Starbox_observe.
- Pi_Scorpii wikiPageUsesTemplate Template:Starbox_orbit.
- Pi_Scorpii wikiPageUsesTemplate Template:Stars_of_Scorpius.
- Pi_Scorpii subject Category:B-type_main-sequence_stars.
- Pi_Scorpii subject Category:Bayer_objects.
- Pi_Scorpii subject Category:Beta_Lyrae_variables.
- Pi_Scorpii subject Category:Scorpius_(constellation).
- Pi_Scorpii subject Category:Triple_star_systems.
- Pi_Scorpii subject Category:Upper_Scorpius.
- Pi_Scorpii hypernym System.
- Pi_Scorpii type CelestialBody.