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• Epsilon_Persei abstract "Epsilon Persei (ε Persei, ε Per) is a multiple star system in the northern constellation of Perseus. It has a combined apparent visual magnitude of +2.88, which is bright enough to be viewed with the naked eye. Based upon parallax measurements, this system is located at a distance of roughly 640 light-years (196 parsecs) from Earth.This is a spectroscopic binary system, which means that the presence of an orbiting companion has been revealed by radial velocity variations in the spectrum of the primary. The two components are orbiting each other with a period of 14 days at a high orbital eccentricity of 0.55. The secondary component has about 6–13% of the primary's mass and may have a stellar classification in the range from A6 V to K1 V. There may be a third component to this system with an orbital period of roughly 9,428 days (25.8 years), although this has not been conclusively demonstrated. If this component exists, it would have about 51–139% of the primary's mass. This high level of uncertainty is because the inclination of the orbit is not known.The primary component of this system, Epsilon Persei A, is a massive star with 12–16 times the Sun's mass and near eight times the radius of the Sun. It has a stellar classification of B0.5 V, making it a B-type main sequence star that is generating energy at its core through the nuclear fusion of hydrogen. Component A is radiating over 28,000 times the Sun's luminosity from its outer envelope at an effective temperature of 26,500 K. This gives the star the blue-white hue that is typical of B-type stars.Epsilon Persei A is a Beta Cephei variable star with a primary pulsation period of 0.1603 days, or 6.24 cycles per day. It may have multiple pulsation frequencies.".
• Epsilon_Persei thumbnail Perseus_IAU.svg?width=300.
• Epsilon_Persei wikiPageExternalLink page8-1005-full.html.
• Epsilon_Persei wikiPageExternalLink al_thurayya.html.
• Epsilon_Persei wikiPageID "8359534".
• Epsilon_Persei wikiPageRevisionID "601559531".
• Epsilon_Persei appmagV "+2.88".
• Epsilon_Persei bV "–0.20".
• Epsilon_Persei class "B0.5 V+".
• Epsilon_Persei component "ε Per A".
• Epsilon_Persei component "ε Per B".
• Epsilon_Persei constell Perseus_(constellation).
• Epsilon_Persei epoch "J2000".
• Epsilon_Persei hasPhotoCollection Epsilon_Persei.
• Epsilon_Persei luminosity "28330".
• Epsilon_Persei mass "0.85".
• Epsilon_Persei name "ε Per B".
• Epsilon_Persei pError "0.23".
• Epsilon_Persei parallax "5.11".
• Epsilon_Persei propMoDec "–23.78".
• Epsilon_Persei propMoRa "+14.06".
• Epsilon_Persei radius "7.66".
• Epsilon_Persei temperature "26500".
• Epsilon_Persei uB "–0.96".
• Epsilon_Persei variable Beta_Cephei_variable.
• Epsilon_Persei subject Category:Alpha_Persei_Cluster.
• Epsilon_Persei subject Category:Bayer_objects.
• Epsilon_Persei subject Category:Flamsteed_objects.
• Epsilon_Persei subject Category:Perseus_(constellation).
• Epsilon_Persei subject Category:Stars_with_proper_names.
• Epsilon_Persei type BayerObjects.
• Epsilon_Persei type CelestialBody109239740.
• Epsilon_Persei type FlamsteedObjects.
• Epsilon_Persei type NaturalObject100019128.
• Epsilon_Persei type Object100002684.
• Epsilon_Persei type PhysicalEntity100001930.
• Epsilon_Persei type Star109444100.
• Epsilon_Persei type StarsWithProperNames.
• Epsilon_Persei type Whole100003553.
• Epsilon_Persei type CelestialBody.
• Epsilon_Persei type Star.
• Epsilon_Persei type PhysicalBody.
• Epsilon_Persei comment "Epsilon Persei (ε Persei, ε Per) is a multiple star system in the northern constellation of Perseus. It has a combined apparent visual magnitude of +2.88, which is bright enough to be viewed with the naked eye.".
• Epsilon_Persei label "Adid Australis".
• Epsilon_Persei label "Epsilon Persei".
• Epsilon_Persei label "Epsilon Persei".
• Epsilon_Persei label "Epsilon Persei".
• Epsilon_Persei label "Epsilon Persei".
• Epsilon_Persei label "Эпсилон Персея".
• Epsilon_Persei label "ペルセウス座イプシロン星".
• Epsilon_Persei label "卷舌二".
• Epsilon_Persei sameAs Adid_Australis.
• Epsilon_Persei sameAs Epsilon_Persei.
• Epsilon_Persei sameAs Epsilon_Persei.
• Epsilon_Persei sameAs Epsilon_Persei.
• Epsilon_Persei sameAs ペルセウス座イプシロン星.
• Epsilon_Persei sameAs Epsilon_Persei.
• Epsilon_Persei sameAs Epsilon_Persei.
• Epsilon_Persei sameAs m.0270q0g.
• Epsilon_Persei sameAs Q13808.
• Epsilon_Persei sameAs Q13808.
• Epsilon_Persei sameAs Epsilon_Persei.
• Epsilon_Persei wasDerivedFrom Epsilon_Persei?oldid=601559531.
• Epsilon_Persei depiction Perseus_IAU.svg.
• Epsilon_Persei isPrimaryTopicOf Epsilon_Persei.
• Epsilon_Persei name "Epsilon Persei".