NGC 6397 V7
| Simbad link | NGC 6397 V7 |
|---|---|
| Source publication | Li, K. (2013) - Two contact binaries at different evolutionary stages in the globular cluster NGC 6397 |
| ADS link | 2013NewA...25...12L |
| Name in Source publication | NGC 6397 V7 |
| Orbital period in days (P [d]) | 0.269861 |
| Mass ratio (q) | 0.37 |
| 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]) | 0.269861 |
| Mass ratio (q) | 0.37 |
| Orbital inclination in degrees (i [o]) | 71.7 |
| Fillout (f) | 0.03 |
| Primary temperature in Kelvins (T1 [K]) | 5985 |
| Secondary temperature in Kelvins (T2 [K]) | 6077 |
| Primary polar radius in units of orbital separation (r1p) | 0.4398 |
| Secondary polar radius in units of orbital separation (r2p) | 0.2781 |
| Surface potential (Ω) | 2.614 |
| Orbital separation in solar radii (a [R]) | 1.82 |
|---|---|
| Primary radius in solar units (R1 [R]) | 0.85 |
| Secondary radius in solar units (R2 [R]) | 0.54 |
| Primary mass in solar units (M1 [M]) | 0.81 |
| Secondary mass in solar units (M2 [M]) | 0.3 |
| Primary temperature in kelvins (T1 [K]) | 5985 |
| Secondary temperature in Kelvins (T2 [K]) | 6077 |
| Primary luminosity in solar units (L1 [L]) | 0.84 |
| Secondary luminosity in solar units (L2 [L]) | 0.36 |
| Distance in parsecs (d [pc]) | 2300 |
| Age in gigayears (τ [gyr]) | 6.08 |
| Orbital period in days (P [d]) | 0.269861 |
|---|---|
| Monotonic period variation in seconds per year (dPdt [s/y]) | 0.003517 |
| Cyclic period variation in years (Pc [y]) |