VW Cephei

Not to be confused with VV Cephei or W Cephei.
VW Cephei

A visual band light curve for VW Cephei, adapted from Kreiner and Winiarski (1981)[1]
Observation data
Epoch J2000.0      Equinox J2000.0
Constellation Cepheus
Right ascension 20h 37m 21.5449s
Declination +75° 36′ 01.456″
Apparent magnitude (V) 7.38
Characteristics
Spectral type G5V/G8V/?K3V/?M5V
Astrometry
Distance90.95 ly
(27.9[2] pc)
Details
Mass1.21/0.22/0.75/0.19? M☉
Radius0.9/0.55/0.77/0.23? R☉
Luminosity0.66/0.17/0.26/0.0038? L☉
Temperature≈5500/5000/≈4700/≈3000 K
Orbit
Period (P)0.0007625 yr
Semi-major axis (a)0.0083AUs″
Eccentricity (e)0 (fixed)
Other designations
VW Cep, LHS 3565, SAO 9828, LTT 16039, BD+75 752, GJ 9703, HD 197433, HIP 101750.
Database references
SIMBADdata

VW Cephei (VW Cep) is an eclipsing contact binary of W Ursae Majoris-type located roughly at 90.6 light years from the Sun, whose two component stars share a common outer layer. Because the two components share their outer layers, as the components of W Ursae Majoris do, they have the same stellar classification, and are classified as yellow G-type main sequence dwarfs. The components take 0.2783 days (roughly 6.7 hours) to revolve around a common barycentre. Orbital period variations suggest the presence of one more additional perturbing objects of likely low-mass stellar nature.

  1. ^ Cite error: The named reference Kreiner was invoked but never defined (see the help page).
  2. ^ Cite error: The named reference Zasche & Wolf was invoked but never defined (see the help page).