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- Psi_Persei abstract "Psi Persei (Psi Per, ψ Persei, ψ Per) is a Be star in the northern constellation of Perseus. It has an apparent visual magnitude of 4.31, so it is visible to the naked eye at night under suitably dark skies. Based on parallax measurements, it is located at a distance of roughly 580 light-years (180 parsecs) from the Earth.This star has a stellar classification of B5Ve, which indicates it is a B-type main sequence star that is generating energy at its core through the nuclear fusion of hydrogen. It is a shell star with a circumstellar disc of gas surrounding the equator and extending out to about 11 times the radius of the star. As a result of this disc, the spectrum of this star shows emission lines (as indicated by the 'e' in the stellar class) and its magnitude varies over a period of about a day.Psi Persei is rotating rapidly with a projected rotational velocity (v sin i) along the equator of 390 km/s or more. The axis of rotation is inclined about 75° ± 8° to the line of sight from the Earth, so this velocity is close to the actual azimuthal velocity along the star's equator. It is expelling mass at the rate of about 5.0 × 10–8 times the mass of the Sun per year, or the equivalent of the Sun's mass every 20 million years. This star may be a member of the Alpha Persei Cluster, although its proper motion is high compared to other members.".
- Psi_Persei thumbnail Perseus_IAU.svg?width=300.
- Psi_Persei wikiPageID "30995829".
- Psi_Persei wikiPageRevisionID "602283539".
- Psi_Persei appmagV "4.31".
- Psi_Persei bV "−0.06".
- Psi_Persei class "B5Ve".
- Psi_Persei constell Perseus_(constellation).
- Psi_Persei epoch "J2000".
- Psi_Persei gravity "4".
- Psi_Persei hasPhotoCollection Psi_Persei.
- Psi_Persei pError "0.22".
- Psi_Persei parallax "5.59".
- Psi_Persei propMoDec "−27.78".
- Psi_Persei propMoRa "+22.55".
- Psi_Persei radialV "−1.1".
- Psi_Persei rotationalVelocity "390".
- Psi_Persei uB "−0.56".
- Psi_Persei variable Shell_star.
- Psi_Persei subject Category:Alpha_Persei_Cluster.
- Psi_Persei subject Category:Bayer_objects.
- Psi_Persei subject Category:Be_stars.
- Psi_Persei subject Category:Flamsteed_objects.
- Psi_Persei subject Category:Perseus_(constellation).
- Psi_Persei type BayerObjects.
- Psi_Persei type BeStars.
- Psi_Persei type CelestialBody109239740.
- Psi_Persei type FlamsteedObjects.
- Psi_Persei type NaturalObject100019128.
- Psi_Persei type Object100002684.
- Psi_Persei type PhysicalEntity100001930.
- Psi_Persei type Star109444100.
- Psi_Persei type Whole100003553.
- Psi_Persei type CelestialBody.
- Psi_Persei type Star.
- Psi_Persei type PhysicalBody.
- Psi_Persei comment "Psi Persei (Psi Per, ψ Persei, ψ Per) is a Be star in the northern constellation of Perseus. It has an apparent visual magnitude of 4.31, so it is visible to the naked eye at night under suitably dark skies. Based on parallax measurements, it is located at a distance of roughly 580 light-years (180 parsecs) from the Earth.This star has a stellar classification of B5Ve, which indicates it is a B-type main sequence star that is generating energy at its core through the nuclear fusion of hydrogen.".
- Psi_Persei label "Psi Persei".
- Psi_Persei label "Psi Persei".
- Psi_Persei label "天船四".
- Psi_Persei sameAs Psi_Persei.
- Psi_Persei sameAs Psi_Persei.
- Psi_Persei sameAs m.0gg7xbx.
- Psi_Persei sameAs Q5176888.
- Psi_Persei sameAs Q5176888.
- Psi_Persei sameAs Psi_Persei.
- Psi_Persei wasDerivedFrom Psi_Persei?oldid=602283539.
- Psi_Persei depiction Perseus_IAU.svg.
- Psi_Persei isPrimaryTopicOf Psi_Persei.
- Psi_Persei name "Psi Persei".
