X Persei

Stellar classification



  • X -379
  • Y -398
  • Z -1281
→ Sol: 1,394

Object type

  • High Mass X-ray Binary
  • Star
  • Double or multiple star
  • Herbig Ae/Be star
  • Be Star
  • Emission-line Star
  • gamma-ray source
  • Infra-Red source
  • Confirmed Neutron Star
  • Pulsar
  • Spectroscopic binary
  • UV-emission source
  • Variable Star
  • X-ray source
simbad:V* X Per


X Persei is a binary star system located in the constellation Perseus, approximately 950 parsecs away.

The optical star X Persei has been classified either as an O-type giant or a B-type main sequence star. It is a Be star, rotating rapidly, and at times surrounded by a disk of expelled material. This qualifies it as a Gamma Cassiopeia variable, and the visual range is magnitude 6 - 7. There is a faint optical companion separated by 22.5" which the Catalog of Components of Double and Multiple Stars refers to as X Persei B.

X Persei A is in orbit with a neutron star, which is catalogued as 4U 0352+309 in the final Uhuru catalog of X-ray objects. It is a pulsar with an unusually long period of 837 seconds.

This article uses material from the Wikipedia article "X Persei", which is released under the Creative Commons Attribution-Share-Alike License 3.0.