20 Persei

Stellar classification



  • X -115
  • Y -72
  • Z -186
→ Sol: 230

Object type

  • Double or multiple star
  • Star
  • Infra-Red source
  • Spectroscopic binary
  • UV-emission source
  • Variable Star
simbad:* 20 Per


20 Persei is a binary star in the constellation Perseus. Its compined apparent magnitude is 5.343, and it is located around 230 light-years (71 pc) distant, based on its parallax.

20 Persei is a visual binary. The orbit of the two stars has been calculated from the secondary changing its position relative to the primary. The two orbit each other every 31.6 years, separated by 0.22 arcseconds. The combined spectrum of 20 Persei matches that of an F-type main-sequence star, and the two stars are thought to have equal masses, 1.5 times that of the Sun. A ninth-magnitude star, designated 20 Persei C, may be associated with the pair.

This article uses material from the Wikipedia article "20 Persei", which is released under the Creative Commons Attribution-Share-Alike License 3.0.