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- Q22086922 subject Q7009469.
- Q22086922 subject Q7465903.
- Q22086922 subject Q7724324.
- Q22086922 subject Q8273100.
- Q22086922 subject Q8393112.
- Q22086922 subject Q8617491.
- Q22086922 subject Q8691170.
- Q22086922 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.".
- Q22086922 wikiPageWikiLink Q10513.
- Q22086922 wikiPageWikiLink Q111130.
- Q22086922 wikiPageWikiLink Q1205564.
- Q22086922 wikiPageWikiLink Q13632.
- Q22086922 wikiPageWikiLink Q1393939.
- Q22086922 wikiPageWikiLink Q1436016.
- Q22086922 wikiPageWikiLink Q1666400.
- Q22086922 wikiPageWikiLink Q193599.
- Q22086922 wikiPageWikiLink Q2703.
- Q22086922 wikiPageWikiLink Q280157.
- Q22086922 wikiPageWikiLink Q49957.
- Q22086922 wikiPageWikiLink Q50089.
- Q22086922 wikiPageWikiLink Q6281393.
- Q22086922 wikiPageWikiLink Q7009469.
- Q22086922 wikiPageWikiLink Q727379.
- Q22086922 wikiPageWikiLink Q7465903.
- Q22086922 wikiPageWikiLink Q7724324.
- Q22086922 wikiPageWikiLink Q8273100.
- Q22086922 wikiPageWikiLink Q8393112.
- Q22086922 wikiPageWikiLink Q845735.
- Q22086922 wikiPageWikiLink Q854050.
- Q22086922 wikiPageWikiLink Q8617491.
- Q22086922 wikiPageWikiLink Q8691170.
- Q22086922 wikiPageWikiLink Q984158.
- Q22086922 type Place.
- Q22086922 type CelestialBody.
- Q22086922 type Location.
- Q22086922 type Place.
- Q22086922 type Star.
- Q22086922 type Thing.
- Q22086922 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.".
- Q22086922 label "R Sagittae".
- Q22086922 name "R Sagittae".