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- R_Sagittae abstract "R Sagittae is an RV Tauri variable star in the constellation Sagitta that varies from magnitude 8.0 to 10.5 in 70.77 days. It is a post-AGB low mass yellow supergiant that varies between spectral types G0Ib and G8Ib as it pulsates. Its variable star designation of \"R\" indicates that it was the first star discovered to be variable in the constellation. It was discovered in 1859 by Joseph Baxendell, though classified as a semi regular variable until RV Tauri variables were identified as a distinct class in 1905.R Sagittae is classified as an RV Tauri variable because of the distinctive regular variations with alternating deep and shallow minima. The period is conventionally quoted as the time between two deep minima and is the fundamental pulsation mode. The shallow minimum is the result of a first overtone pulsation. It is further classified as RVb since the average and maximum magnitude varies slowly over several years. The main period also varies over a period of decades. R Sagittae is around 980 light-years (300 parsecs) distant from Earth. It has around 90% the mass of the Sun and an average effective (surface) temperature of around 5000 K. It is around 10,000 times as luminous as the Sun.Variable star observer David Levy recommends that amateur observers monitor it once a week to observe changes in brightness.RV Tauri variables are post-AGB stars, originally similar to the Sun but now in the last stages of their lives. They are crossing the Cepheid instability strip as they lose their outer layers on the way to becoming a planetary nebula. Although their spectra and luminosities resemble supergiants, they are old low mass population II stars. A period-colour-luminosity relationship has been derived from observations of RV Tauri variables in the Large Magellanic Cloud that is closely related to the relationship for type II Cepheid variables.".
- R_Sagittae wikiPageID "46771535".
- R_Sagittae wikiPageLength "6789".
- R_Sagittae wikiPageOutDegree "28".
- R_Sagittae wikiPageRevisionID "699476658".
- R_Sagittae wikiPageWikiLink American_Association_of_Variable_Star_Observers.
- R_Sagittae wikiPageWikiLink Asymptotic_giant_branch.
- R_Sagittae wikiPageWikiLink Category:Astronomical_objects_discovered_in_1859.
- R_Sagittae wikiPageWikiLink Category:Durchmusterung_objects.
- R_Sagittae wikiPageWikiLink Category:G-type_supergiants.
- R_Sagittae wikiPageWikiLink Category:Henry_Draper_Catalogue_objects.
- R_Sagittae wikiPageWikiLink Category:Objects_named_with_variable_star_designations.
- R_Sagittae wikiPageWikiLink Category:RV_Tauri_variables.
- R_Sagittae wikiPageWikiLink Category:Sagitta_(constellation).
- R_Sagittae wikiPageWikiLink Durchmusterung.
- R_Sagittae wikiPageWikiLink Effective_temperature.
- R_Sagittae wikiPageWikiLink Epoch_(astronomy).
- R_Sagittae wikiPageWikiLink Henry_Draper_Catalogue.
- R_Sagittae wikiPageWikiLink Instability_strip.
- R_Sagittae wikiPageWikiLink International_Celestial_Reference_System.
- R_Sagittae wikiPageWikiLink Joseph_Baxendell.
- R_Sagittae wikiPageWikiLink Large_Magellanic_Cloud.
- R_Sagittae wikiPageWikiLink Planetary_nebula.
- R_Sagittae wikiPageWikiLink RV_Tauri_variable.
- R_Sagittae wikiPageWikiLink Sagitta.
- R_Sagittae wikiPageWikiLink Smithsonian_Astrophysical_Observatory_Star_Catalog.
- R_Sagittae wikiPageWikiLink Stellar_population.
- R_Sagittae wikiPageWikiLink Supergiant.
- R_Sagittae wikiPageWikiLink Type_II_Cepheid.
- R_Sagittae wikiPageWikiLinkText "R Sagittae".
- R_Sagittae wikiPageWikiLinkText "R Sge".
- R_Sagittae absmagV "–3.82".
- R_Sagittae appmagV "8.9".
- R_Sagittae bV "+0.75-+1.3".
- R_Sagittae class "G0Ib-G8Ib".
- R_Sagittae constell Sagitta.
- R_Sagittae distPc "300".
- R_Sagittae epoch Epoch_(astronomy).
- R_Sagittae equinox "J2000.0".
- R_Sagittae gravity "-0.5".
- R_Sagittae luminosity "~10,000".
- R_Sagittae mass "0.9".
- R_Sagittae metalFe "-0.5".
- R_Sagittae propMoDec "−2.7".
- R_Sagittae propMoRa "−2.4".
- R_Sagittae radialV "+8.3".
- R_Sagittae temperature "4750".
- R_Sagittae type Supergiant.
- R_Sagittae uB "+0.1-+0.9".
- R_Sagittae variable RV_Tauri_variable.
- R_Sagittae wikiPageUsesTemplate Template:DEC.
- R_Sagittae wikiPageUsesTemplate Template:RA.
- R_Sagittae wikiPageUsesTemplate Template:Reflist.
- R_Sagittae wikiPageUsesTemplate Template:Starbox_astrometry.
- R_Sagittae wikiPageUsesTemplate Template:Starbox_begin.
- R_Sagittae wikiPageUsesTemplate Template:Starbox_catalog.
- R_Sagittae wikiPageUsesTemplate Template:Starbox_character.
- R_Sagittae wikiPageUsesTemplate Template:Starbox_detail.
- R_Sagittae wikiPageUsesTemplate Template:Starbox_end.
- R_Sagittae wikiPageUsesTemplate Template:Starbox_observe.
- R_Sagittae wikiPageUsesTemplate Template:Starbox_reference.
- R_Sagittae wikiPageUsesTemplate Template:Stars_of_Sagitta.
- R_Sagittae subject Category:Astronomical_objects_discovered_in_1859.
- R_Sagittae subject Category:Durchmusterung_objects.
- R_Sagittae subject Category:G-type_supergiants.
- R_Sagittae subject Category:Henry_Draper_Catalogue_objects.
- R_Sagittae subject Category:Objects_named_with_variable_star_designations.
- R_Sagittae subject Category:RV_Tauri_variables.
- R_Sagittae subject Category:Sagitta_(constellation).
- R_Sagittae hypernym Star.
- R_Sagittae type CelestialBody.
- R_Sagittae type Place.
- R_Sagittae type Star.
- R_Sagittae type Location.
- R_Sagittae type Place.
- R_Sagittae type Thing.
- R_Sagittae comment "R Sagittae is an RV Tauri variable star in the constellation Sagitta that varies from magnitude 8.0 to 10.5 in 70.77 days. It is a post-AGB low mass yellow supergiant that varies between spectral types G0Ib and G8Ib as it pulsates. Its variable star designation of \"R\" indicates that it was the first star discovered to be variable in the constellation.".
- R_Sagittae label "R Sagittae".
- R_Sagittae sameAs Q22086922.
- R_Sagittae sameAs m.0138wn6r.
- R_Sagittae sameAs Q22086922.
- R_Sagittae wasDerivedFrom R_Sagittae?oldid=699476658.
- R_Sagittae isPrimaryTopicOf R_Sagittae.
- R_Sagittae name "R Sagittae".