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W Ursae Minoris is an eclipsing binary star system in the constellation Ursa Minor. Its apparent magnitude ranges from 8.51 to 9.59 over 1.7 days as one star passes in front of the other relative to observers on Earth. The combined spectrum of the system is A1/2V. Slight changes in the orbital period suggest that there is a third component of the multiple star system, most likely a red dwarf, with an orbital period of 62.2±3.9 years. Another study suggests that the third star has a minimum mass of 0.49 M☉ and an orbit of about 72 years.

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dbo:abstract
  • W Ursae Minoris est une étoile multiple de la constellation de la Petite Ourse, distante d'environ ∼1 350 a.l. (∼414 pc) de la Terre. Vue de la Terre, l'une des étoiles du système passe devant l'autre, et il s'agit donc d'une binaire à éclipses de type Algol, dont la magnitude apparente passe de 8,51 à 9,59 tous les 1,7 jour. Le spectre combiné du système correspond à celui d'une étoile blanche de la séquence principale de type spectral A2V, mais les masses des deux composantes sont inconnues. Un léger changement dans la période orbitale observé en 1973 suggère qu'il existe une troisième composante dans ce système d'étoiles multiple, probablement une naine rouge. Sa période orbitale serait de 62,2 ± 3,9 années. (fr)
  • W Ursae Minoris is an eclipsing binary star system in the constellation Ursa Minor. Its apparent magnitude ranges from 8.51 to 9.59 over 1.7 days as one star passes in front of the other relative to observers on Earth. The combined spectrum of the system is A1/2V. Slight changes in the orbital period suggest that there is a third component of the multiple star system, most likely a red dwarf, with an orbital period of 62.2±3.9 years. Another study suggests that the third star has a minimum mass of 0.49 M☉ and an orbit of about 72 years. The two main stars are currently thought to have masses of 3.2 M☉ and 1.4 M☉ respectively. Models of their evolution and mass transfer suggest that the secondary star was initially the more massive of the two and that it has lost mass to what is now the primary as well as losing mass completely from the system. The two stars have also spiralled in towards each other over the few hundred million years since they formed. (en)
  • W Ursae Minoris är en kortperiodisk förmörkelsevariabel av Algol-typ i stjärnbilden Lilla björnen. Stjärnan har en magnitud som varierar mellan +8,51 och +9,59 med en period på 1,7011576 dygn. (sv)
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  • ≈400 (en)
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  • 8.510000 (xsd:double)
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  • A1/2V (en)
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  • Aa (en)
  • Ab (en)
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  • 0 (xsd:integer)
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  • J2000 (en)
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  • 0.031500 (xsd:double)
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  • 2.414400 (xsd:double)
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rdfs:comment
  • W Ursae Minoris est une étoile multiple de la constellation de la Petite Ourse, distante d'environ ∼1 350 a.l. (∼414 pc) de la Terre. Vue de la Terre, l'une des étoiles du système passe devant l'autre, et il s'agit donc d'une binaire à éclipses de type Algol, dont la magnitude apparente passe de 8,51 à 9,59 tous les 1,7 jour. Le spectre combiné du système correspond à celui d'une étoile blanche de la séquence principale de type spectral A2V, mais les masses des deux composantes sont inconnues. Un léger changement dans la période orbitale observé en 1973 suggère qu'il existe une troisième composante dans ce système d'étoiles multiple, probablement une naine rouge. Sa période orbitale serait de 62,2 ± 3,9 années. (fr)
  • W Ursae Minoris är en kortperiodisk förmörkelsevariabel av Algol-typ i stjärnbilden Lilla björnen. Stjärnan har en magnitud som varierar mellan +8,51 och +9,59 med en period på 1,7011576 dygn. (sv)
  • W Ursae Minoris is an eclipsing binary star system in the constellation Ursa Minor. Its apparent magnitude ranges from 8.51 to 9.59 over 1.7 days as one star passes in front of the other relative to observers on Earth. The combined spectrum of the system is A1/2V. Slight changes in the orbital period suggest that there is a third component of the multiple star system, most likely a red dwarf, with an orbital period of 62.2±3.9 years. Another study suggests that the third star has a minimum mass of 0.49 M☉ and an orbit of about 72 years. (en)
rdfs:label
  • W Ursae Minoris (fr)
  • W Ursae Minoris (en)
  • W Ursae Minoris (sv)
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  • W Ursae Minoris (en)
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