NGC 7789 V12
| Simbad link | NGC 7789 V12 |
|---|---|
| Source publication | Qian, S. -B. (2015) - Photometric Investigation of the Totally Eclipsing Contact Binary V12 in the Intermediate-Age Open Cluster NGC 7789 |
| ADS link | 2015AJ....149...38Q |
| Name in Source publication | NGC 7789 V12 |
| Orbital period in days (P [d]) | 0.391686 |
| Mass ratio (q) | 0.26 |
| 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]) | 0.391686 |
| Mass ratio (q) | 0.26 |
| Orbital inclination in degrees (i [o]) | 83.6 |
| Fillout (f) | 0.44 |
| Primary temperature in Kelvins (T1 [K]) | 5686 |
| Secondary temperature in Kelvins (T2 [K]) | 5862 |
| Primary polar radius in units of orbital separation (r1p) | 0.4831 |
| Secondary polar radius in units of orbital separation (r2p) | 0.2684 |
| Surface potential (Ω) | 2.3041 |
| Orbital separation in solar radii (a [R]) | 2.43 |
|---|---|
| Primary radius in solar units (R1 [R]) | |
| Secondary radius in solar units (R2 [R]) | |
| Primary mass in solar units (M1 [M]) | 1 |
| Secondary mass in solar units (M2 [M]) | 0.26 |
| Primary temperature in kelvins (T1 [K]) | 5686 |
| Secondary temperature in Kelvins (T2 [K]) | 5862 |
| Primary luminosity in solar units (L1 [L]) | |
| Secondary luminosity in solar units (L2 [L]) | |
| Distance in parsecs (d [pc]) | |
| Age in gigayears (τ [gyr]) |
| Orbital period in days (P [d]) | 0.391686 |
|---|---|
| Monotonic period variation in seconds per year (dPdt [s/y]) | 0.214272 |
| Cyclic period variation in years (Pc [y]) |