About: SW Ursae Majoris

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SW Ursae Majoris is a cataclysmic binary star system in the northern circumpolar constellation of Ursa Major, abbreviated SW UMa. During quiescence it has an apparent visual magnitude of 16.5–17, which is too faint to be visible to the naked eye. Based on parallax measurements, it is located at a distance of approximately 526 light years from the Sun.

Attributes	Values
rdf:type	Thing place dbo:Location schema:Place celestial body star
rdfs:label	SW Ursae Majoris (en)
rdfs:comment	SW Ursae Majoris is a cataclysmic binary star system in the northern circumpolar constellation of Ursa Major, abbreviated SW UMa. During quiescence it has an apparent visual magnitude of 16.5–17, which is too faint to be visible to the naked eye. Based on parallax measurements, it is located at a distance of approximately 526 light years from the Sun. (en)
foaf:depiction
dct:subject	Objects with variable star designations Ursa Major (constellation) White dwarfs Dwarf novae
Wikipage page ID	71770439 (xsd:integer)
Wikipage revision ID	1110861525 (xsd:integer)
Link from a Wikipage to another Wikipage	SU UMa Binary star Ursa Major Dwarf nova Intermediate polar Lidiya Tseraskaya Light curve Objects with variable star designations Ursa Major (constellation) White dwarfs Quasi-periodic oscillation Light year Orbital period Stellar parallax White dwarf Astrophysical X-ray source Bolometric luminosity Dwarf novae Sun Taichi Kato Circumpolar constellation Apparent visual magnitude Cataclysmic variable star Superhump U Geminorum Star U Geminorum star dbr:Allen_W._Shafter dbr:Edward_L._Robinson
sameAs	SW Ursae Majoris SW Ursae Majoris
dbp:wikiPageUsesTemplate	dbt:Citation dbt:Div_col dbt:Div_col_end dbt:Reflist dbt:Short_description dbt:Starbox_astrometry dbt:Starbox_begin dbt:Starbox_catalog dbt:Starbox_character dbt:Starbox_detail dbt:Starbox_end dbt:Starbox_image dbt:Starbox_observe dbt:Starbox_reference dbt:Val dbt:± dbt:DEC dbt:Odlist dbt:RA dbt:Stars_of_Ursa_Major
thumbnail	wiki-commons:Special:FilePath/SWUMaLightCurve.png?width=300
absmag v	+4.9 (en)
component	White dwarf (en) donor (en)
constell	Ursa Major
epoch	J2000 (en)
gravity	8.010000 (xsd:double)
luminosity	0.001000 (xsd:double)
mass	0.100000 (xsd:double) 0.610000 (xsd:double)
p error	0.060200 (xsd:double)
parallax	6.200200 (xsd:double)
prop mo dec	5.928000 (xsd:double)
prop mo ra	−28.713 (en)
radius	0.012900 (xsd:double)
temperature	13854 (xsd:integer)
variable	U Geminorum Star
has abstract	SW Ursae Majoris is a cataclysmic binary star system in the northern circumpolar constellation of Ursa Major, abbreviated SW UMa. During quiescence it has an apparent visual magnitude of 16.5–17, which is too faint to be visible to the naked eye. Based on parallax measurements, it is located at a distance of approximately 526 light years from the Sun. The variable nature of this object was noted by L. Tseraskaya in 1909 when it increased in brightness to 10th magnitude. It was determined to be a U Geminorum star, indicating this is a binary star system. A short orbital period of 81.8 minutes was determined by and associates in 1986. The same year, and associates detected superhumps with a period of 84.0 minutes. Large amplitude quasi-periodic oscillations were observed by T. Kato and associates in 1992, which is a property of SU UMa-type dwarf novae. When the system is in a quiet period, it displays a periodicity of 15.9 minutes and has a marginal emission of soft X-rays. This is likely the rotation period of the white dwarf, and the system resembles an intermediate polar with a strongly-magnetized white dwarf as the accreting component. It undergoes outbursts that vary in brightness and duration. During quiescence, it is estimated that about 70% of the bolometric luminosity of the system is produced by the white dwarf, with almost all the rest produced by the accretion disk. (en)
prov:wasDerivedFrom	wikipedia-en:SW_Ursae_Majoris?oldid=1110861525&ns=0
page length (characters) of wiki page	16686 (xsd:nonNegativeInteger)
foaf:isPrimaryTopicOf	wikipedia-en:SW_Ursae_Majoris
is foaf:primaryTopic of	wikipedia-en:SW_Ursae_Majoris

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