II UMa
| Simbad link | II UMa |
|---|---|
| Source publication | Zhou, X. (2016) - Photometric and Period Investigation of the Late F-type Overcontact Binary II UMa |
| ADS link | 2016AJ....151...67Z |
| Name in Source publication | II UMa |
| Orbital period in days (P [d]) | 0.82522 |
| Mass ratio (q) | 0.17 |
| Mass ratio determination | Spectroscopic |
| Type | A |
| Has total eclipse? | |
| Has spots? | |
| Has third light? | |
| Has period variation? |
| Solver | WD |
|---|---|
| Orbital period in days (P [d]) | 0.82522 |
| Mass ratio (q) | 0.17 |
| Orbital inclination in degrees (i [o]) | 77.7 |
| Fillout (f) | 0.87 |
| Primary temperature in Kelvins (T1 [K]) | 6424 |
| Secondary temperature in Kelvins (T2 [K]) | 6418 |
| Primary polar radius in units of orbital separation (r1p) | 0.5227 |
| Secondary polar radius in units of orbital separation (r2p) | 0.2522 |
| Surface potential (Ω) | 2.0656 |
| Orbital separation in solar radii (a [R]) | 4.91 |
|---|---|
| Primary radius in solar units (R1 [R]) | |
| Secondary radius in solar units (R2 [R]) | |
| Primary mass in solar units (M1 [M]) | 1.99 |
| Secondary mass in solar units (M2 [M]) | 0.34 |
| Primary temperature in kelvins (T1 [K]) | 6424 |
| Secondary temperature in Kelvins (T2 [K]) | 6418 |
| 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]) | 0.82522 |
|---|---|
| Monotonic period variation in seconds per year (dPdt [s/y]) | 0.042163 |
| Cyclic period variation in years (Pc [y]) |
| Designation | Gaia DR2 1571033242274284928 |
|---|---|
| RA | 188:13:43.71744 |
| DEC | 54:47:46.450788 |
| l | 128.6450262 |
| b | 62.12607238 |
| G magnitude | 14.03093 |
| G_bp magnitude | |
| G_rp magnitude | |
| Radial velocity [km/s] | |
| Parallax | 1.991582188 |
| Distance [pc] | 502.113348 |
| Temperature [K] | |
| Radius [R] | |
| Luminosity [L] |
| Simbad link | II UMa |
|---|---|
| J magnitude | 7.496 |
| H magnitude | 7.307 |
| K magnitude | 7.285 |
| Johnson_U magnitude | 8.02 |
| Johnson_B magnitude | 9.34 |
| Johnson_V magnitude | 8.7 |
| Johnson_R magnitude | 8.72 |
| Johnson_I magnitude | |
| Sloan_u magnitude | |
| Sloan_g magnitude | 8.2665 |
| Sloan_r magnitude | 8.72 |
| Sloan_i magnitude | 8.02 |
| Sloan_z magnitude |