V442 UMa
| Simbad link | V442 UMa |
|---|---|
| Source publication | Loukaidou, G. A. (2022) - CoBiToM Project - II. Evolution of contact binary systems close to the orbital period cut-off |
| ADS link | 2022MNRAS.514.5528L |
| Name in Source publication | 1SWASP J093010.78+533859.5 |
| Orbital period in days (P [d]) | 0.227714 |
| Mass ratio (q) | 0.4 |
| Mass ratio determination | Spectroscopic |
| Temperature determination | Color index |
| Type | Unspecified |
| Has total eclipse? | |
| Has spots? | |
| Has third light? | |
| Has period variation? |
| Solver | WD |
|---|---|
| Orbital period in days (P [d]) | 0.227714 |
| Mass ratio (q) | 0.4 |
| Orbital inclination in degrees (i [o]) | 88 |
| Fillout (f) | 0.19 |
| Primary temperature in Kelvins (T1 [K]) | 4700 |
| Secondary temperature in Kelvins (T2 [K]) | 4800 |
| Primary polar radius in units of orbital separation (r1p) | |
| Secondary polar radius in units of orbital separation (r2p) | |
| Surface potential (Ω) | 2.627 |
| Orbital separation in solar radii (a [R]) | |
|---|---|
| Primary radius in solar units (R1 [R]) | 0.8 |
| Secondary radius in solar units (R2 [R]) | 0.5 |
| Primary mass in solar units (M1 [M]) | 0.85 |
| Secondary mass in solar units (M2 [M]) | 0.34 |
| Primary temperature in kelvins (T1 [K]) | 4700 |
| Secondary temperature in Kelvins (T2 [K]) | 4800 |
| Primary luminosity in solar units (L1 [L]) | 0.28 |
| Secondary luminosity in solar units (L2 [L]) | 0.12 |
| Distance in parsecs (d [pc]) | |
| Age in gigayears (τ [gyr]) |
| Orbital period in days (P [d]) | 0.227714 |
|---|---|
| Monotonic period variation in seconds per year (dPdt [s/y]) | |
| Cyclic period variation in years (Pc [y]) | 14.5 |
| Host | Longitude λ [o] | Latitude β [o] | Angular radius σ [o] | Temperature contrast Tspot/Tstar |
|---|---|---|---|---|
| Primary | 72.1 | 19.7 | 0.846 |
| Designation | Gaia DR3 1019985089906439040 |
|---|---|
| RA | 142:32:43.671314 |
| DEC | 53:38:58.147683 |
| l | 162.9001623170339 |
| b | 44.75797513343282 |
| G [mag] | 10.814138 |
| G_bp [mag] | 10.972323 |
| G_rp [mag] | 9.668415 |
| Parallax | 14.262458045077855 |
| Distance [pc] | |
| Temperature [K] | |
| Surface gravity log(g) [cm/s2] | |
| Metallicity [Fe/H] | |
| Monochromatic extinction A0 [mag] | |
| Radius [R] | |
| Luminosity [L] |
| Temperature [K] | 4664.29 |
|---|---|
| Surface gravity log(g) [cm/s2] | 4.468 |
| Metallicity [Fe/H] | -0.206 |
| Simbad link | V442 UMa |
|---|---|
| J magnitude | |
| H magnitude | |
| K magnitude | |
| Johnson_U magnitude | |
| Johnson_B magnitude | 11.84 |
| Johnson_V magnitude | 10.98 |
| Johnson_R magnitude | |
| Johnson_I magnitude | |
| Sloan_u magnitude | |
| Sloan_g magnitude | |
| Sloan_r magnitude | |
| Sloan_i magnitude | |
| Sloan_z magnitude |