II Per
| Simbad link | II Per |
|---|---|
| Source publication | Zhu, L. Y. (2009) - Near-Contact Binaries with Mass Transfer: V473 Cassiopeiae and II Persei |
| ADS link | 2009AJ....137.3574Z |
| Name in Source publication | II Per |
| Orbital period in days (P [d]) | 0.47985 |
| Mass ratio (q) | 0.37 |
| Mass ratio determination | Photometric |
| Type | A |
| Has total eclipse? | |
| Has spots? | |
| Has third light? | |
| Has period variation? |
| Solver | WD |
|---|---|
| Orbital period in days (P [d]) | 0.47985 |
| Mass ratio (q) | 0.37 |
| Orbital inclination in degrees (i [o]) | 80.4 |
| Fillout (f) | 0 |
| Primary temperature in Kelvins (T1 [K]) | 5740 |
| Secondary temperature in Kelvins (T2 [K]) | 4464 |
| Primary polar radius in units of orbital separation (r1p) | 0.4385 |
| Secondary polar radius in units of orbital separation (r2p) | 0.2773 |
| Surface potential (Ω) | 2.622 |
| Orbital separation in solar radii (a [R]) | 2.82 |
|---|---|
| Primary radius in solar units (R1 [R]) | 1.31 |
| Secondary radius in solar units (R2 [R]) | 0.84 |
| Primary mass in solar units (M1 [M]) | 0.95 |
| Secondary mass in solar units (M2 [M]) | 0.36 |
| Primary temperature in kelvins (T1 [K]) | 5740 |
| Secondary temperature in Kelvins (T2 [K]) | 4464 |
| Primary luminosity in solar units (L1 [L]) | 6.86 |
| Secondary luminosity in solar units (L2 [L]) | 0.25 |
| Distance in parsecs (d [pc]) | |
| Age in gigayears (τ [gyr]) | 13.51 |
| Orbital period in days (P [d]) | 0.47985 |
|---|---|
| Monotonic period variation in seconds per year (dPdt [s/y]) | -0.006523 |
| Cyclic period variation in years (Pc [y]) |
| Designation | Gaia DR2 253441901271920256 |
|---|---|
| RA | 67:24:24.01614 |
| DEC | 44:25:40.462284 |
| l | 158.5542565 |
| b | -2.83481196 |
| G magnitude | 13.167514 |
| G_bp magnitude | 13.540747 |
| G_rp magnitude | 12.61748 |
| Radial velocity [km/s] | |
| Parallax | 1.257191423 |
| Distance [pc] | 795.423817 |
| Temperature [K] | 5330.067 |
| Radius [R] | 1.911503 |
| Luminosity [L] | 2.6569004 |
| Simbad link | II Per |
|---|---|
| J magnitude | 12.428 |
| H magnitude | 12.089 |
| K magnitude | 11.995 |
| Johnson_U magnitude | |
| Johnson_B magnitude | |
| Johnson_V magnitude | |
| Johnson_R magnitude | |
| Johnson_I magnitude | |
| Sloan_u magnitude | |
| Sloan_g magnitude | 13.1675 |
| Sloan_r magnitude | |
| Sloan_i magnitude | |
| Sloan_z magnitude |