BV Dra

Simbad link BV Dra
Source publication Kaluzny, J. (1986) - The combined photometric and spectroscopic solutions for contact binaries BV DRA and BW Dra.
ADS link 1986AJ.....92..666K
Name in Source publication BV Dra
Orbital period in days (P [d]) 0.350067
Mass ratio (q) 0.41
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]) 0.350067
Mass ratio (q) 0.41
Orbital inclination in degrees (i [o]) 76.3
Fillout (f) 0.22
Primary temperature in Kelvins (T1 [K]) 6245
Secondary temperature in Kelvins (T2 [K]) 6345
Primary polar radius in units of orbital separation (r1p) 0.4407
Secondary polar radius in units of orbital separation (r2p) 0.2954
Surface potential (Ω) 2.645

Orbital separation in solar radii (a [R]) 1.65
Primary radius in solar units (R1 [R]) 1.12
Secondary radius in solar units (R2 [R]) 0.76
Primary mass in solar units (M1 [M]) 1.04
Secondary mass in solar units (M2 [M]) 0.43
Primary temperature in kelvins (T1 [K]) 6245
Secondary temperature in Kelvins (T2 [K]) 6345
Primary luminosity in solar units (L1 [L]) 1.71
Secondary luminosity in solar units (L2 [L]) 0.84
Distance in parsecs (d [pc])
Age in gigayears (τ [gyr]) 3.73

Orbital period in days (P [d]) 0.350067
Monotonic period variation in seconds per year (dPdt [s/y]) 0.002506
Cyclic period variation in years (Pc [y]) 23.8
Period study Yang, Y. -G. (2009) - Orbital Period Changes and Their Evolutionary Status for Weak-Contact Binaries. II. CC Comae Berenices and BV Draconis
ADS link 2009AJ....137..236Y

Designation Gaia DR2 1616589410627042560
RA 227:57:30.00312
DEC 61:51:26.764164
l 98.92052393
b 48.20395658
G magnitude 8.073827
G_bp magnitude 8.395343
G_rp magnitude 7.6270514
Radial velocity [km/s]
Parallax 16.12090456
Distance [pc] 62.031259
Temperature [K] 5906.85
Radius [R] 1.2365085
Luminosity [L] 1.6769215

Simbad link BV Dra
J magnitude 7.265
H magnitude 7.039
K magnitude 6.933
Johnson_U magnitude
Johnson_B magnitude 8.54
Johnson_V magnitude
Johnson_R magnitude 7.7
Johnson_I magnitude
Sloan_u magnitude
Sloan_g magnitude 8.0738
Sloan_r magnitude 7.7
Sloan_i magnitude
Sloan_z magnitude

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