WUMaCat

Simbad link	V781 Tau
Source publication	Li, K. (2016) - The active W UMa type binary star V781 Tau revisited
ADS link	2016Ap&SS.361...63L
Name in Source publication	V781 Tau
Orbital period in days (P [d])	0.34491
Mass ratio (q)	0.45
Mass ratio determination	Spectroscopic
Type	W
Has total eclipse?
Has spots?
Has third light?
Has period variation?

Solver	WD
Orbital period in days (P [d])	0.34491
Mass ratio (q)	0.45
Orbital inclination in degrees (i [^o])	65.9
Fillout (f)	0.24
Primary temperature in Kelvins (T₁ [K])	5575
Secondary temperature in Kelvins (T₂ [K])	6000
Primary polar radius in units of orbital separation (r_1p)	0.4343
Secondary polar radius in units of orbital separation (r_2p)	0.3045
Surface potential (Ω)	2.7182

Orbital separation in solar radii (a [R])	2.72
Primary radius in solar units (R₁ [R])	1.26
Secondary radius in solar units (R₂ [R])	0.89
Primary mass in solar units (M₁ [M])	1.57
Secondary mass in solar units (M₂ [M])	0.71
Primary temperature in kelvins (T₁ [K])	5575
Secondary temperature in Kelvins (T₂ [K])	6000
Primary luminosity in solar units (L₁ [L])	1.38
Secondary luminosity in solar units (L₂ [L])	0.92
Distance in parsecs (d [pc])
Age in gigayears (τ [gyr])	3.87

V781 Tau