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 |