Matches in DBpedia 2016-04 for { <http://wikidata.dbpedia.org/resource/Q1072624> ?p ?o }
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- Q1072624 subject Q10661.
- Q1072624 subject Q6271579.
- Q1072624 subject Q6454106.
- Q1072624 subject Q6461968.
- Q1072624 subject Q7207584.
- Q1072624 subject Q7217188.
- Q1072624 subject Q8293947.
- Q1072624 subject Q8617355.
- Q1072624 subject Q8641743.
- Q1072624 subject Q8759509.
- Q1072624 subject Q8790837.
- Q1072624 subject Q8824842.
- Q1072624 abstract "Xi Ursae Majoris (Xi UMa, ξ Ursae Majoris, ξ UMa) is a star system in the constellation Ursa Major. On May 2, 1780, Sir William Herschel discovered that this was a binary star system, making it the first such system ever discovered. It was the first visual double star for which an orbit was calculated, when it was computed by Félix Savary in 1828.The two components are yellow G-type main-sequence stars. The brighter component, Xi Ursae Majoris A, has a mean apparent magnitude of +4.41. It is classified as an RS Canum Venaticorum type variable star and its brightness varies by 0.01 magnitudes. The companion star, Xi Ursae Majoris B has an apparent magnitude of +4.87. The orbital period of the two stars is 59.84 years, and they are currently separated by 1.2 arcseconds, or at least 10 AU.Each component of this double star is itself a spectroscopic binary. B's binary companion, denoted Xi Ursae Majoris Bb, is unresolved, but the binary star is known to have an orbital period of 3.98 days. The masses of both A and B's companions (Ab and Bb) (deduced by the sum total mass of the system minus the likely masses of Aa and Ba determined by their class) indicate that they are probably MV stars (red dwarfs), Bb being on the cool end of the M spectrum, not much hotter than a brown dwarf.It also has the proper name Alula Australis (and erroneously Alula Australe).".
- Q1072624 thumbnail Ursa_Major_constellation_map.svg?width=300.
- Q1072624 wikiPageExternalLink alulaaus.html.
- Q1072624 wikiPageExternalLink aluaussys.htm.
- Q1072624 wikiPageExternalLink alulaaus.htm.
- Q1072624 wikiPageWikiLink Q10661.
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- Q1072624 wikiPageWikiLink Q2745251.
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- Q1072624 wikiPageWikiLink Q6271579.
- Q1072624 wikiPageWikiLink Q6454106.
- Q1072624 wikiPageWikiLink Q6461968.
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- Q1072624 wikiPageWikiLink Q7207584.
- Q1072624 wikiPageWikiLink Q7217188.
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- Q1072624 wikiPageWikiLink Q8293947.
- Q1072624 wikiPageWikiLink Q850950.
- Q1072624 wikiPageWikiLink Q8617355.
- Q1072624 wikiPageWikiLink Q8641743.
- Q1072624 wikiPageWikiLink Q8759509.
- Q1072624 wikiPageWikiLink Q8790837.
- Q1072624 wikiPageWikiLink Q8824842.
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- Q1072624 type Place.
- Q1072624 type CelestialBody.
- Q1072624 type Location.
- Q1072624 type Place.
- Q1072624 type Star.
- Q1072624 type Thing.
- Q1072624 comment "Xi Ursae Majoris (Xi UMa, ξ Ursae Majoris, ξ UMa) is a star system in the constellation Ursa Major. On May 2, 1780, Sir William Herschel discovered that this was a binary star system, making it the first such system ever discovered. It was the first visual double star for which an orbit was calculated, when it was computed by Félix Savary in 1828.The two components are yellow G-type main-sequence stars. The brighter component, Xi Ursae Majoris A, has a mean apparent magnitude of +4.41.".
- Q1072624 label "Xi Ursae Majoris".
- Q1072624 depiction Ursa_Major_constellation_map.svg.
- Q1072624 name "Xi Ursae Majoris".