V646 Lac

Simbad link V646 Lac
Source publication Kjurkchieva, Diana P. (2019) - Global Parameters of 12 Totally Eclipsing W UMa Stars
ADS link 2019AJ....158..186K
Name in Source publication V646 Lac
Orbital period in days (P [d]) 0.30081
Mass ratio (q) 0.33
Mass ratio determination Photometric
Type W
Has total eclipse?
Has spots?
Has third light?
Has period variation?

Solver PHOEBE
Orbital period in days (P [d]) 0.30081
Mass ratio (q) 0.33
Orbital inclination in degrees (i [o]) 91.7
Fillout (f) 0.13
Primary temperature in Kelvins (T1 [K]) 5567
Secondary temperature in Kelvins (T2 [K]) 5682
Primary polar radius in units of orbital separation (r1p) 0.4536
Secondary polar radius in units of orbital separation (r2p) 0.2733
Surface potential (Ω) 2.5043

Orbital separation in solar radii (a [R]) 2.02
Primary radius in solar units (R1 [R]) 0.98
Secondary radius in solar units (R2 [R]) 0.6
Primary mass in solar units (M1 [M]) 0.92
Secondary mass in solar units (M2 [M]) 0.3
Primary temperature in kelvins (T1 [K]) 5567
Secondary temperature in Kelvins (T2 [K]) 5682
Primary luminosity in solar units (L1 [L]) 0.83
Secondary luminosity in solar units (L2 [L]) 0.33
Distance in parsecs (d [pc]) 494
Age in gigayears (τ [gyr]) 6.51

Orbital period in days (P [d]) 0.30081
Monotonic period variation in seconds per year (dPdt [s/y]) 0.148608
Cyclic period variation in years (Pc [y])

Simbad link V646 Lac
J magnitude 12.282
H magnitude 11.887
K magnitude 11.748
Johnson_U magnitude
Johnson_B magnitude
Johnson_V magnitude
Johnson_R magnitude
Johnson_I magnitude
Sloan_u magnitude
Sloan_g magnitude 13.5607
Sloan_r magnitude
Sloan_i magnitude
Sloan_z magnitude

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