VV Cephei

Stellar classification



  • X -2348
  • Y 305
  • Z -638
→ Sol: 2,452

Object type

  • Eclipsing binary of Algol type
  • Star
  • Double or multiple star
  • Emission-line Star
  • Infra-Red source
  • Spectroscopic binary
  • Variable Star
simbad:V* VV Cep


VV Cephei, also known as HD 208816, is an eclipsing binary star system located in the constellation Cepheus, approximately 5,000 light years from Earth. It is both a B[e] star and shell star.

VV Cephei is an eclipsing binary with the second longest known period. A red supergiant fills its Roche lobe when closest to a companion blue star, the latter appearing to be on the main sequence. Matter flows from the red supergiant onto the blue companion for at least part of the orbit and the hot star is obscured by a large disk of material. The supergiant primary, known as VV Cephei A, is currently recognised as one of the largest stars in the galaxy, with an estimated radius between 1,050 R and 1,900 R.

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