VW Cep
| Simbad link | VW Cep |
|---|---|
| Source publication | Mitnyan, T. (2018) - The contact binary VW Cephei revisited: surface activity and period variation |
| ADS link | 2018A&A...612A..91M |
| Name in Source publication | VW Cep |
| Orbital period in days (P [d]) | 0.278315 |
| Mass ratio (q) | 0.3 |
| Mass ratio determination | Spectroscopic |
| Type | W |
| Has total eclipse? | |
| Has spots? | |
| Has third light? | |
| Has period variation? |
| Solver | PHOEBE |
|---|---|
| Orbital period in days (P [d]) | 0.278315 |
| Mass ratio (q) | 0.3 |
| Orbital inclination in degrees (i [o]) | 62.9 |
| Fillout (f) | 0 |
| Primary temperature in Kelvins (T1 [K]) | 5050 |
| Secondary temperature in Kelvins (T2 [K]) | 5342 |
| Primary polar radius in units of orbital separation (r1p) | 0.4554 |
| Secondary polar radius in units of orbital separation (r2p) | 0.2617 |
| Surface potential (Ω) | 2.4706 |
| Orbital separation in solar radii (a [R]) | 2.03 |
|---|---|
| Primary radius in solar units (R1 [R]) | 0.99 |
| Secondary radius in solar units (R2 [R]) | 0.57 |
| Primary mass in solar units (M1 [M]) | 1.13 |
| Secondary mass in solar units (M2 [M]) | 0.34 |
| Primary temperature in kelvins (T1 [K]) | 5050 |
| Secondary temperature in Kelvins (T2 [K]) | 5342 |
| Primary luminosity in solar units (L1 [L]) | 0.57 |
| Secondary luminosity in solar units (L2 [L]) | 0.24 |
| Distance in parsecs (d [pc]) | |
| Age in gigayears (τ [gyr]) | 9.03 |
| Orbital period in days (P [d]) | 0.278315 |
|---|---|
| Monotonic period variation in seconds per year (dPdt [s/y]) | -0.015984 |
| Cyclic period variation in years (Pc [y]) |
| Designation | Gaia DR2 2278045985170934016 |
|---|---|
| RA | 309:20:44.91816 |
| DEC | 75:36:10.23534 |
| l | 109.2274147 |
| b | 20.05809366 |
| G magnitude | 7.2188497 |
| G_bp magnitude | 7.6508217 |
| G_rp magnitude | 6.556531 |
| Radial velocity [km/s] | |
| Parallax | 37.5601819 |
| Distance [pc] | 26.623939 |
| Temperature [K] | 5020 |
| Radius [R] | 1.1462469 |
| Luminosity [L] | 0.75173706 |
| Simbad link | VW Cep |
|---|---|
| J magnitude | 5.962 |
| H magnitude | 5.425 |
| K magnitude | 5.312 |
| Johnson_U magnitude | 10.696 |
| Johnson_B magnitude | 8.13 |
| Johnson_V magnitude | |
| Johnson_R magnitude | 11.098 |
| Johnson_I magnitude | |
| Sloan_u magnitude | 13.124 |
| Sloan_g magnitude | 11.776 |
| Sloan_r magnitude | 11.098 |
| Sloan_i magnitude | 10.696 |
| Sloan_z magnitude | 7.345 |