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- 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.[citation needed]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 wikiPageRevisionID "602282568".
- Pi_Scorpii ageMyr ",".
- 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 hasPhotoCollection Pi_Scorpii.
- Pi_Scorpii inclination "About 42".
- Pi_Scorpii k "124.1".
- Pi_Scorpii k "196.1".
- Pi_Scorpii luminosity "21900".
- Pi_Scorpii pError "0.64".
- Pi_Scorpii parallax "5.57".
- 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 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 type B-typeMainSequenceStars.
- Pi_Scorpii type BayerObjects.
- Pi_Scorpii type BetaLyraeVariables.
- Pi_Scorpii type CelestialBody109239740.
- Pi_Scorpii type NaturalObject100019128.
- Pi_Scorpii type Object100002684.
- Pi_Scorpii type PhysicalEntity100001930.
- Pi_Scorpii type Star109444100.
- Pi_Scorpii type Thing100002452.
- Pi_Scorpii type Variable109468959.
- Pi_Scorpii type Whole100003553.
- Pi_Scorpii type CelestialBody.
- Pi_Scorpii type Star.
- Pi_Scorpii type PhysicalBody.
- Pi_Scorpii comment "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.".
- Pi_Scorpii label "Pi Scorpii".
- Pi_Scorpii label "Pi Scorpii".
- Pi_Scorpii label "Pi Scorpii".
- Pi_Scorpii label "Pi Scorpii".
- Pi_Scorpii label "Pi Scorpii".
- Pi_Scorpii label "Пи Скорпиона".
- Pi_Scorpii label "さそり座パイ星".
- Pi_Scorpii sameAs Pi_Scorpii.
- Pi_Scorpii sameAs Pi_Scorpii.
- Pi_Scorpii sameAs Pi_Scorpii.
- Pi_Scorpii sameAs さそり座パイ星.
- Pi_Scorpii sameAs Pi_Scorpii.
- Pi_Scorpii sameAs m.07wb5s.
- Pi_Scorpii sameAs Q2538697.
- Pi_Scorpii sameAs Q2538697.
- Pi_Scorpii sameAs Pi_Scorpii.
- Pi_Scorpii wasDerivedFrom Pi_Scorpii?oldid=602282568.
- Pi_Scorpii depiction Scorpius_IAU.svg.
- Pi_Scorpii isPrimaryTopicOf Pi_Scorpii.
- Pi_Scorpii name "Pi Scorpii".