HV UMa
| Simbad link | HV UMa |
|---|---|
| Source publication | Csák, B. (2000) - HV Ursae Majoris, a new contact binary with early-type components |
| ADS link | 2000A&A...356..603C |
| Name in Source publication | HV UMa |
| Orbital period in days (P [d]) | 0.355385 |
| Mass ratio (q) | 0.19 |
| Mass ratio determination | Spectroscopic |
| Temperature determination | Unknown |
| Type | W |
| Has total eclipse? | |
| Has spots? | |
| Has third light? | |
| Has period variation? |
| Solver | Bynsyn |
|---|---|
| Orbital period in days (P [d]) | 0.355385 |
| Mass ratio (q) | 0.19 |
| Orbital inclination in degrees (i [o]) | 57.3 |
| Fillout (f) | 0.77 |
| Primary temperature in Kelvins (T1 [K]) | 7000 |
| Secondary temperature in Kelvins (T2 [K]) | 7910 |
| Primary polar radius in units of orbital separation (r1p) | 0.5141 |
| Secondary polar radius in units of orbital separation (r2p) | 0.2566 |
| Surface potential (Ω) | 2.1141 |
| Orbital separation in solar radii (a [R]) | 5 |
|---|---|
| Primary radius in solar units (R1 [R]) | 2.62 |
| Secondary radius in solar units (R2 [R]) | 1.18 |
| Primary mass in solar units (M1 [M]) | 2.8 |
| Secondary mass in solar units (M2 [M]) | 0.2 |
| Primary temperature in kelvins (T1 [K]) | 7000 |
| Secondary temperature in Kelvins (T2 [K]) | 7910 |
| Primary luminosity in solar units (L1 [L]) | 14.8 |
| Secondary luminosity in solar units (L2 [L]) | 4.89 |
| Distance in parsecs (d [pc]) | |
| Age in gigayears (τ [gyr]) | 0.91 |
| Designation | Gaia DR2 774558834567373184 |
|---|---|
| RA | 178:54:30.87648 |
| DEC | 47:15:26.053704 |
| l | 147.7852598 |
| b | 67.08781674 |
| G [mag] | 8.605039 |
| G_bp [mag] | 8.75989 |
| G_rp [mag] | 8.355418 |
| Parallax | 3.950002829 |
| Distance [pc] | 2.03E-09 |
| Temperature [K] | 7470.1523 |
| Surface gravity log(g) [cm/s2] | |
| Metallicity [Fe/H] | |
| Monochromatic extinction A0 [mag] | |
| Radius [R] | 2.4764562 |
| Luminosity [L] | 17.20576 |
| Simbad link | HV UMa |
|---|---|
| J magnitude | 8.177 |
| H magnitude | 8.12 |
| K magnitude | 8.031 |
| Johnson_U magnitude | |
| Johnson_B magnitude | 8.9 |
| Johnson_V magnitude | 8.64 |
| Johnson_R magnitude | |
| Johnson_I magnitude | |
| Sloan_u magnitude | |
| Sloan_g magnitude | 8.605 |
| Sloan_r magnitude | |
| Sloan_i magnitude | |
| Sloan_z magnitude |