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- Q136713 subject Q7009588.
- Q136713 subject Q8284795.
- Q136713 subject Q8293947.
- Q136713 abstract "Epsilon Lupi (ε Lup) is a multiple star system in the southern constellation of Lupus. At an apparent visual magnitude of 3.41, Epsilon Lupi can be readily viewed from the southern hemisphere with sufficiently dark skies. It is the fifth brightest star or star system in the constellation. Parallax measurements give a distance to this system of roughly 510 light-years (160 parsecs).This system is what astronomers term a double-lined spectroscopic binary. When the spectrum is examined, the absorption line features of both stars can be viewed. As a result of the Doppler effect, these lines shift back and forth in frequency as the two stars orbit around each other. This allows some of their orbital elements to be deduced, even though the individual stars have not been resolved with a telescope. The pair share a close, elliptical orbit with a period of 4.55970 days. The orbital eccentricity is 0.277, which means that at the separation at closest approach, or periapsis, is only 57% of the distance at their greatest separation, or apoapsis. There is a third, more distant companion at an angular separation of 26.5 arcseconds that may be orbiting the pair with a period of about 64 years.The pair that share the close orbit, Epsilon Lupi A and Epsilon Lupi a, have estimated masses of 13.24 and 11.46 times the mass of the Sun, respectively. The more distant component, Epsilon Lupi B, has a mass of about 7.64 times the Sun. The combined stellar classification of the system is B2 IV-V, while the individual components may have spectral classes of B3 IV, B3 V, and A5 V, in order of decreasing mass. The inner A-a pair appear to have their rate of spin synchronized with their orbit, so that the same face of each star always faces its partner. The secondary, Epsilon Lupi a, shows regular variation in luminosity of the type that occurs with Beta Cephei variables, at a periodicity of 10.36 cycles per day.This star system is a probable member of the Scorpius-Centaurus Association, a moving group of stars that originated together and share a similar trajectory through space.".
- Q136713 thumbnail Lupus_IAU.svg?width=300.
- Q136713 wikiPageWikiLink Q10571.
- Q136713 wikiPageWikiLink Q111130.
- Q136713 wikiPageWikiLink Q1142653.
- Q136713 wikiPageWikiLink Q124313.
- Q136713 wikiPageWikiLink Q1357788.
- Q136713 wikiPageWikiLink Q165074.
- Q136713 wikiPageWikiLink Q179600.
- Q136713 wikiPageWikiLink Q180892.
- Q136713 wikiPageWikiLink Q208474.
- Q136713 wikiPageWikiLink Q212111.
- Q136713 wikiPageWikiLink Q22066400.
- Q136713 wikiPageWikiLink Q2703.
- Q136713 wikiPageWikiLink Q2722595.
- Q136713 wikiPageWikiLink Q272626.
- Q136713 wikiPageWikiLink Q37640.
- Q136713 wikiPageWikiLink Q45059.
- Q136713 wikiPageWikiLink Q499138.
- Q136713 wikiPageWikiLink Q50053.
- Q136713 wikiPageWikiLink Q555846.
- Q136713 wikiPageWikiLink Q595871.
- Q136713 wikiPageWikiLink Q6440.
- Q136713 wikiPageWikiLink Q654182.
- Q136713 wikiPageWikiLink Q7009588.
- Q136713 wikiPageWikiLink Q76436.
- Q136713 wikiPageWikiLink Q764463.
- Q136713 wikiPageWikiLink Q8284795.
- Q136713 wikiPageWikiLink Q8293947.
- Q136713 wikiPageWikiLink Q83481.
- Q136713 wikiPageWikiLink Q845735.
- Q136713 wikiPageWikiLink Q850950.
- Q136713 wikiPageWikiLink Q8928.
- Q136713 type Place.
- Q136713 type CelestialBody.
- Q136713 type Location.
- Q136713 type Place.
- Q136713 type Star.
- Q136713 type Thing.
- Q136713 comment "Epsilon Lupi (ε Lup) is a multiple star system in the southern constellation of Lupus. At an apparent visual magnitude of 3.41, Epsilon Lupi can be readily viewed from the southern hemisphere with sufficiently dark skies. It is the fifth brightest star or star system in the constellation. Parallax measurements give a distance to this system of roughly 510 light-years (160 parsecs).This system is what astronomers term a double-lined spectroscopic binary.".
- Q136713 label "Epsilon Lupi".
- Q136713 depiction Lupus_IAU.svg.
- Q136713 name "Epsilon Lupi".