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 |