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• Plasketts_star abstract "Plaskett's Star, also known as HR 2422 and V640 Monocerotis, is a spectroscopic binary at a distance of around 6600 light-years. It is one of the most massive binary stars known, with a total mass of around one hundred times that of the Sun. Indeed, it was long thought to be the most massive known binary system, but evidence collected between 1996–2005 demonstrated that Eta Carinae, which was previously thought to be a massive individual star, is a binary system.This system is named after John Stanley Plaskett, the Canadian astronomer who discovered its binary nature in 1922. Plaskett was assisted in his observations by his son, Harry Hemley Plaskett. The pair have a combined visual magnitude of 6.05, and is located in the constellation of Monoceros.The orbital period for the pair is 7006124383600000000♠14.39625±0.00095 d. The secondary is a rapid rotator with a projected rotational velocity of 300 km·s−1, giving it a pronounced equatorial bulge. The brightness varies irregularly from 6.0 to 6.1 on a timescale of a few hours, thought to be due to many factors including the binary orbit, hot spots in the colliding winds, and granulation.The luminosities of each component are much lower than expected for their spectral types. It has been suggested that the star may be twice as far away as assumed, not a member of the Monoceros OB2 association, and each component would be about four times as luminous as currently calculated. The masses derived from the binary orbit are also somewhat higher than expected from the spectral types, but with considerable uncertainty due to assumptions about the inclination.".
• Plasketts_star wikiPageID "4660271".
• Plasketts_star wikiPageLength "7636".
• Plasketts_star wikiPageOutDegree "27".
• Plasketts_star wikiPageRevisionID "700499758".
• Plasketts_star wikiPageWikiLink Apparent_magnitude.
• Plasketts_star wikiPageWikiLink Binary_star.
• Plasketts_star wikiPageWikiLink Bright_Star_Catalogue.
• Plasketts_star wikiPageWikiLink Category:Durchmusterung_objects.
• Plasketts_star wikiPageWikiLink Category:HR_objects.
• Plasketts_star wikiPageWikiLink Category:Henry_Draper_Catalogue_objects.
• Plasketts_star wikiPageWikiLink Category:Hipparcos_objects.
• Plasketts_star wikiPageWikiLink Category:Monoceros_(constellation).
• Plasketts_star wikiPageWikiLink Category:O-type_giants.
• Plasketts_star wikiPageWikiLink Category:O-type_supergiants.
• Plasketts_star wikiPageWikiLink Category:Objects_named_with_variable_star_designations.
• Plasketts_star wikiPageWikiLink Category:Spectroscopic_binaries.
• Plasketts_star wikiPageWikiLink Constellation.
• Plasketts_star wikiPageWikiLink Durchmusterung.
• Plasketts_star wikiPageWikiLink Epoch_(astronomy).
• Plasketts_star wikiPageWikiLink Eta_Carinae.
• Plasketts_star wikiPageWikiLink Harry_Hemley_Plaskett.
• Plasketts_star wikiPageWikiLink Henry_Draper_Catalogue.
• Plasketts_star wikiPageWikiLink Hipparcos.
• Plasketts_star wikiPageWikiLink John_Stanley_Plaskett.
• Plasketts_star wikiPageWikiLink Light-year.
• Plasketts_star wikiPageWikiLink Monoceros.
• Plasketts_star wikiPageWikiLink Stellar_rotation.
• Plasketts_star wikiPageWikiLink Sun.
• Plasketts_star wikiPageWikiLink Variable_star_designation.
• Plasketts_star wikiPageWikiLinkText "Plaskett's star".
• Plasketts_star appmagV "6.06".
• Plasketts_star bV "+0.05".
• Plasketts_star class "O8I + O7.5III".
• Plasketts_star component "A".
• Plasketts_star component "B".
• Plasketts_star constell Monoceros.
• Plasketts_star distLy "5245".
• Plasketts_star distPc "1608".
• Plasketts_star epoch Epoch_(astronomy).
• Plasketts_star gravity "3.5".
• Plasketts_star luminosity "123000".
• Plasketts_star luminosity "224000".
• Plasketts_star mass "54".
• Plasketts_star mass "56".
• Plasketts_star propMoDec "+0.31".
• Plasketts_star propMoRa "–2.73".
• Plasketts_star radialV "+24.5".
• Plasketts_star radius "10.8".
• Plasketts_star radius "14.2".
• Plasketts_star rotationalVelocity "300".
• Plasketts_star rotationalVelocity "75".
• Plasketts_star temperature "33000".
• Plasketts_star temperature "33500".
• Plasketts_star uB "–0.88".
• Plasketts_star wikiPageUsesTemplate Template:DEC.
• Plasketts_star wikiPageUsesTemplate Template:RA.
• Plasketts_star wikiPageUsesTemplate Template:Reflist.
• Plasketts_star wikiPageUsesTemplate Template:Starbox_astrometry.
• Plasketts_star wikiPageUsesTemplate Template:Starbox_begin.
• Plasketts_star wikiPageUsesTemplate Template:Starbox_catalog.
• Plasketts_star wikiPageUsesTemplate Template:Starbox_character.
• Plasketts_star wikiPageUsesTemplate Template:Starbox_detail.
• Plasketts_star wikiPageUsesTemplate Template:Starbox_end.
• Plasketts_star wikiPageUsesTemplate Template:Starbox_observe.
• Plasketts_star wikiPageUsesTemplate Template:Starbox_reference.
• Plasketts_star wikiPageUsesTemplate Template:Stars_of_Monoceros.
• Plasketts_star wikiPageUsesTemplate Template:Val.
• Plasketts_star subject Category:Durchmusterung_objects.
• Plasketts_star subject Category:HR_objects.
• Plasketts_star subject Category:Henry_Draper_Catalogue_objects.
• Plasketts_star subject Category:Hipparcos_objects.
• Plasketts_star subject Category:Monoceros_(constellation).
• Plasketts_star subject Category:O-type_giants.
• Plasketts_star subject Category:O-type_supergiants.
• Plasketts_star subject Category:Objects_named_with_variable_star_designations.
• Plasketts_star subject Category:Spectroscopic_binaries.
• Plasketts_star type CelestialBody.
• Plasketts_star type Place.
• Plasketts_star type Star.
• Plasketts_star type Catalogue.
• Plasketts_star type Redirect.
• Plasketts_star type Location.
• Plasketts_star type Place.
• Plasketts_star type Thing.
• Plasketts_star comment "Plaskett's Star, also known as HR 2422 and V640 Monocerotis, is a spectroscopic binary at a distance of around 6600 light-years. It is one of the most massive binary stars known, with a total mass of around one hundred times that of the Sun.".
• Plasketts_star label "Plaskett's star".
• Plasketts_star sameAs Q14074.
• Plasketts_star sameAs نجمة_بلاسكيت.
• Plasketts_star sameAs Estrella_de_Plaskett.
• Plasketts_star sameAs HR_2422.
• Plasketts_star sameAs Estrella_de_Plaskett.
• Plasketts_star sameAs ستاره_پلاسکت.
• Plasketts_star sameAs Étoile_de_Plaskett.
• Plasketts_star sameAs Stella_di_Plaskett.
• Plasketts_star sameAs プラスケット星.
• Plasketts_star sameAs 플라스켓의_별.
• Plasketts_star sameAs Gwiazda_Plasketta.
• Plasketts_star sameAs m.0cfylt.
• Plasketts_star sameAs Звезда_Пласкетта.

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