V728 Her
| Simbad link | V728 Her |
|---|---|
| Source publication | Erkan, N. (2016) - The low mass ratio contact binary system V728 Herculis |
| ADS link | 2016NewA...46...73E |
| Name in Source publication | V728 Her |
| Orbital period in days (P [d]) | 0.471289 |
| Mass ratio (q) | 0.18 |
| Mass ratio determination | Spectroscopic |
| Type | W |
| Has total eclipse? | |
| Has spots? | |
| Has third light? | |
| Has period variation? |
| Solver | PHOEBE |
|---|---|
| Orbital period in days (P [d]) | 0.471289 |
| Mass ratio (q) | 0.18 |
| Orbital inclination in degrees (i [o]) | 69.3 |
| Fillout (f) | 0.81 |
| Primary temperature in Kelvins (T1 [K]) | 6600 |
| Secondary temperature in Kelvins (T2 [K]) | 6743 |
| Primary polar radius in units of orbital separation (r1p) | 0.519 |
| Secondary polar radius in units of orbital separation (r2p) | 0.2528 |
| Surface potential (Ω) | 2.0846 |
| Orbital separation in solar radii (a [R]) | 3.22 |
|---|---|
| Primary radius in solar units (R1 [R]) | 1.87 |
| Secondary radius in solar units (R2 [R]) | 0.82 |
| Primary mass in solar units (M1 [M]) | 1.8 |
| Secondary mass in solar units (M2 [M]) | 0.28 |
| Primary temperature in kelvins (T1 [K]) | 6600 |
| Secondary temperature in Kelvins (T2 [K]) | 6743 |
| Primary luminosity in solar units (L1 [L]) | 5.9 |
| Secondary luminosity in solar units (L2 [L]) | 1.24 |
| Distance in parsecs (d [pc]) | |
| Age in gigayears (τ [gyr]) | 2.3 |
| Orbital period in days (P [d]) | 0.471289 |
|---|---|
| Monotonic period variation in seconds per year (dPdt [s/y]) | 0.016589 |
| Cyclic period variation in years (Pc [y]) | 76 |
| Designation | Gaia DR2 1348042457276499840 |
|---|---|
| RA | 259:31:04.12824 |
| DEC | 41:50:38.49738 |
| l | 66.80305855 |
| b | 34.53308255 |
| G magnitude | 10.888222 |
| G_bp magnitude | 11.103681 |
| G_rp magnitude | 10.555835 |
| Radial velocity [km/s] | |
| Parallax | 2.244061368 |
| Distance [pc] | 445.620612 |
| Temperature [K] | 6751.705 |
| Radius [R] | |
| Luminosity [L] |
| Simbad link | V728 Her |
|---|---|
| J magnitude | 10.061 |
| H magnitude | 9.91 |
| K magnitude | 9.863 |
| Johnson_U magnitude | |
| Johnson_B magnitude | 11.25 |
| Johnson_V magnitude | 10.61 |
| Johnson_R magnitude | |
| Johnson_I magnitude | |
| Sloan_u magnitude | |
| Sloan_g magnitude | 10.8882 |
| Sloan_r magnitude | |
| Sloan_i magnitude | |
| Sloan_z magnitude |