BL Leo
| Simbad link | BL Leo |
|---|---|
| Source publication | Yang, Y. -G. (2013) - Photometric Studies of Three Neglected Short-period Contact Binaries GN Bootis, BL Leonis, and V1918 Cygni |
| ADS link | 2013AJ....145...60Y |
| Name in Source publication | BL Leo |
| Orbital period in days (P [d]) | 0.281931 |
| Mass ratio (q) | 0.48 |
| Mass ratio determination | Photometric |
| Type | W |
| Has total eclipse? | |
| Has spots? | |
| Has third light? | |
| Has period variation? |
| Solver | WD |
|---|---|
| Orbital period in days (P [d]) | 0.281931 |
| Mass ratio (q) | 0.48 |
| Orbital inclination in degrees (i [o]) | 82.2 |
| Fillout (f) | 0.21 |
| Primary temperature in Kelvins (T1 [K]) | 5520 |
| Secondary temperature in Kelvins (T2 [K]) | 5896 |
| Primary polar radius in units of orbital separation (r1p) | 0.4289 |
| Secondary polar radius in units of orbital separation (r2p) | 0.3069 |
| Surface potential (Ω) | 2.7688 |
| Orbital separation in solar radii (a [R]) | 2 |
|---|---|
| Primary radius in solar units (R1 [R]) | 0.92 |
| Secondary radius in solar units (R2 [R]) | 0.65 |
| Primary mass in solar units (M1 [M]) | 0.92 |
| Secondary mass in solar units (M2 [M]) | 0.43 |
| Primary temperature in kelvins (T1 [K]) | 5520 |
| Secondary temperature in Kelvins (T2 [K]) | 5896 |
| Primary luminosity in solar units (L1 [L]) | 0.71 |
| Secondary luminosity in solar units (L2 [L]) | 0.46 |
| Distance in parsecs (d [pc]) | |
| Age in gigayears (τ [gyr]) | 6.59 |
| Orbital period in days (P [d]) | 0.281931 |
|---|---|
| Monotonic period variation in seconds per year (dPdt [s/y]) | -0.003992 |
| Cyclic period variation in years (Pc [y]) |
| Designation | Gaia DR2 4005077554939612288 |
|---|---|
| RA | 176:24:36.03564 |
| DEC | 24:46:50.576916 |
| l | 218.2685588 |
| b | 75.03587271 |
| G magnitude | 13.556803 |
| G_bp magnitude | 14.022195 |
| G_rp magnitude | 12.915785 |
| Radial velocity [km/s] | |
| Parallax | 2.368094353 |
| Distance [pc] | 422.280472 |
| Temperature [K] | 5056.16 |
| Radius [R] | 0.9642134 |
| Luminosity [L] | 0.5474246 |
| Simbad link | BL Leo |
|---|---|
| J magnitude | 12.092 |
| H magnitude | 11.674 |
| K magnitude | 11.566 |
| Johnson_U magnitude | |
| Johnson_B magnitude | |
| Johnson_V magnitude | 13.51 |
| Johnson_R magnitude | |
| Johnson_I magnitude | |
| Sloan_u magnitude | |
| Sloan_g magnitude | 13.5568 |
| Sloan_r magnitude | |
| Sloan_i magnitude | |
| Sloan_z magnitude |