WUMaCat

Simbad link	UY UMa
Source publication	Kim, Chun-Hwey (2019) - UY Ursae Majoris: An A-Subtype W UMa System with a Very Large Fill-Out Factor and an Extreme Mass Ratio
ADS link	2019JASS...36..265K
Name in Source publication	UY UMa
Orbital period in days (P [d])	0.376022
Mass ratio (q)	0.21
Mass ratio determination	Photometric
Type	A
Has total eclipse?
Has spots?
Has third light?
Has period variation?

Solver	WD
Orbital period in days (P [d])	0.376022
Mass ratio (q)	0.21
Orbital inclination in degrees (i [^o])	81.3
Fillout (f)	0.61
Primary temperature in Kelvins (T₁ [K])	5900
Secondary temperature in Kelvins (T₂ [K])	5882
Primary polar radius in units of orbital separation (r_1p)	0.5042
Secondary polar radius in units of orbital separation (r_2p)	0.2565
Surface potential (Ω)	2.167

Orbital separation in solar radii (a [R])	2.44
Primary radius in solar units (R₁ [R])	1.34
Secondary radius in solar units (R₂ [R])	0.7
Primary mass in solar units (M₁ [M])	1.15
Secondary mass in solar units (M₂ [M])	0.24
Primary temperature in kelvins (T₁ [K])	5900
Secondary temperature in Kelvins (T₂ [K])	5882
Primary luminosity in solar units (L₁ [L])	1.95
Secondary luminosity in solar units (L₂ [L])	0.52
Distance in parsecs (d [pc])	745
Age in gigayears (τ [gyr])	5.5

UY UMa