AL Cas
| Simbad link | AL Cas |
|---|---|
| Source publication | Qian, S. -B. (2014) - AL Cassiopeiae: An F-type Contact Binary System with a Cool Stellar Companion |
| ADS link | 2014AJ....148...79Q |
| Name in Source publication | AL Cas |
| Orbital period in days (P [d]) | 0.500556 |
| Mass ratio (q) | 0.61 |
| 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]) | 0.500556 |
| Mass ratio (q) | 0.61 |
| Orbital inclination in degrees (i [o]) | 80.6 |
| Fillout (f) | 0.39 |
| Primary temperature in Kelvins (T1 [K]) | 6400 |
| Secondary temperature in Kelvins (T2 [K]) | 6316 |
| Primary polar radius in units of orbital separation (r1p) | 0.4203 |
| Secondary polar radius in units of orbital separation (r2p) | 0.3389 |
| Surface potential (Ω) | 2.9418 |
| Orbital separation in solar radii (a [R]) | 3.42 |
|---|---|
| Primary radius in solar units (R1 [R]) | |
| Secondary radius in solar units (R2 [R]) | |
| Primary mass in solar units (M1 [M]) | 1.33 |
| Secondary mass in solar units (M2 [M]) | 0.81 |
| Primary temperature in kelvins (T1 [K]) | 6400 |
| Secondary temperature in Kelvins (T2 [K]) | 6316 |
| 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]) | 0.500556 |
|---|---|
| Monotonic period variation in seconds per year (dPdt [s/y]) | |
| Cyclic period variation in years (Pc [y]) | 86.6 |
| Designation | Gaia DR2 521244450885154304 |
|---|---|
| RA | 33:26:09.587688 |
| DEC | 70:08:42.934596 |
| l | 129.8620549 |
| b | 8.388813703 |
| G magnitude | 12.497354 |
| G_bp magnitude | 12.921716 |
| G_rp magnitude | 11.909569 |
| Radial velocity [km/s] | |
| Parallax | 1.470555232 |
| Distance [pc] | 680.015261 |
| Temperature [K] | 5321 |
| Radius [R] | 2.2339394 |
| Luminosity [L] | 3.6042135 |
| Simbad link | AL Cas |
|---|---|
| J magnitude | 11.037 |
| H magnitude | 10.789 |
| K magnitude | 10.714 |
| Johnson_U magnitude | |
| Johnson_B magnitude | 12.3 |
| Johnson_V magnitude | |
| Johnson_R magnitude | |
| Johnson_I magnitude | |
| Sloan_u magnitude | |
| Sloan_g magnitude | 12.4974 |
| Sloan_r magnitude | |
| Sloan_i magnitude | |
| Sloan_z magnitude |