V857 Her
| Simbad link | V857 Her |
|---|---|
| Source publication | Qian, S. -B. (2005) - Deep, Low Mass Ratio Overcontact Binary Systems. V. The Lowest Mass Ratio Binary V857 Herculis |
| ADS link | 2005AJ....130.1206Q |
| Name in Source publication | V857 Her |
| Orbital period in days (P [d]) | 0.38223 |
| Mass ratio (q) | 0.07 |
| Mass ratio determination | Photometric |
| Type | W |
| Has total eclipse? | |
| Has spots? | |
| Has third light? | |
| Has period variation? |
| Solver | WD |
|---|---|
| Orbital period in days (P [d]) | 0.38223 |
| Mass ratio (q) | 0.07 |
| Orbital inclination in degrees (i [o]) | 85.4 |
| Fillout (f) | 0.84 |
| Primary temperature in Kelvins (T1 [K]) | 8300 |
| Secondary temperature in Kelvins (T2 [K]) | 8513 |
| Primary polar radius in units of orbital separation (r1p) | 0.5706 |
| Secondary polar radius in units of orbital separation (r2p) | 0.1824 |
| Surface potential (Ω) | 1.8092 |
| Orbital separation in solar radii (a [R]) | |
|---|---|
| Primary radius in solar units (R1 [R]) | |
| Secondary radius in solar units (R2 [R]) | |
| Primary mass in solar units (M1 [M]) | |
| Secondary mass in solar units (M2 [M]) | |
| Primary temperature in kelvins (T1 [K]) | 8300 |
| Secondary temperature in Kelvins (T2 [K]) | 8513 |
| 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]) | 0.38223 |
|---|---|
| Monotonic period variation in seconds per year (dPdt [s/y]) | 0.025056 |
| Cyclic period variation in years (Pc [y]) |
| Designation | Gaia DR2 1352346392464295168 |
|---|---|
| RA | 251:43:22.42236 |
| DEC | 38:38:58.643016 |
| l | 62.00853305 |
| b | 40.10501205 |
| G magnitude | 10.703465 |
| G_bp magnitude | 10.89742 |
| G_rp magnitude | 10.417702 |
| Radial velocity [km/s] | |
| Parallax | 2.933368743 |
| Distance [pc] | 340.904976 |
| Temperature [K] | 7038.52 |
| Radius [R] | 1.4190254 |
| Luminosity [L] | 4.4524646 |
| Simbad link | V857 Her |
|---|---|
| J magnitude | 9.988 |
| H magnitude | 9.86 |
| K magnitude | 9.81 |
| Johnson_U magnitude | |
| Johnson_B magnitude | 11.04 |
| Johnson_V magnitude | 10.87 |
| Johnson_R magnitude | |
| Johnson_I magnitude | |
| Sloan_u magnitude | |
| Sloan_g magnitude | 10.7035 |
| Sloan_r magnitude | |
| Sloan_i magnitude | |
| Sloan_z magnitude |