VW Cephei

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VW Cephei

A visual band light curve for VW Cephei, adapted from Kreiner and Winiarski (1981)[1]
Observation data 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
Distance		90.95 ly (27.9[2] pc)
Details
Mass	1.21/0.22/0.75/0.19? M☉
Radius	0.9/0.55/0.77/0.23? R☉
Luminosity	0.66/0.17/0.26/0.0038? L☉
Temperature	≈5500/5000/≈4700/≈3000 K
Eccentricity (e)		0 (fixed)
HIP 101750.
Database references
SIMBAD	data

VW Cephei (VW Cep) is an eclipsing

Orbital period variations suggest the presence of one more perturbing unseen object around the eclipsing binary.[2] Several publications have tried to set constrains to putative orbital period and minimum mass for unseen component. The most recent article^[2] proposes an orbital period of 29.8 years for a stellar object with roughly three fourths the Sun's mass and high orbital eccentricity (e=0.66). Inclination is assumed being 33.6 degrees. Nevertheless, hints of an additional body in the system still subsist and the authors infer a period of 77.46 years and eccentricity of 0.54 for unseen fourth component. Minimum mass is unclear, tentatively assumed being as small as 0.19

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