V842 Her
| Simbad link | V842 Her |
|---|---|
| Source publication | Erdem, A. (2009) - Photometric analysis of the contact binary star V842 Hercules on the basis of seasonal light curves |
| ADS link | 2009NewA...14..321E |
| Name in Source publication | V842 Her |
| Orbital period in days (P [d]) | 0.419033 |
| Mass ratio (q) | 0.26 |
| Mass ratio determination | Spectroscopic |
| Type | W |
| Has total eclipse? | |
| Has spots? | |
| Has third light? | |
| Has period variation? |
| Solver | WD |
|---|---|
| Orbital period in days (P [d]) | 0.419033 |
| Mass ratio (q) | 0.26 |
| Orbital inclination in degrees (i [o]) | 78.3 |
| Fillout (f) | 0.25 |
| Primary temperature in Kelvins (T1 [K]) | 5723 |
| Secondary temperature in Kelvins (T2 [K]) | 6020 |
| Primary polar radius in units of orbital separation (r1p) | 0.4765 |
| Secondary polar radius in units of orbital separation (r2p) | 0.2606 |
| Surface potential (Ω) | 2.3326 |
| Orbital separation in solar radii (a [R]) | 2.88 |
|---|---|
| Primary radius in solar units (R1 [R]) | 1.47 |
| Secondary radius in solar units (R2 [R]) | 0.81 |
| Primary mass in solar units (M1 [M]) | 1.45 |
| Secondary mass in solar units (M2 [M]) | 0.38 |
| Primary temperature in kelvins (T1 [K]) | 5723 |
| Secondary temperature in Kelvins (T2 [K]) | 6020 |
| Primary luminosity in solar units (L1 [L]) | 2.08 |
| Secondary luminosity in solar units (L2 [L]) | 0.77 |
| Distance in parsecs (d [pc]) | 177 |
| Age in gigayears (τ [gyr]) | 3.71 |
| Orbital period in days (P [d]) | 0.419033 |
|---|---|
| Monotonic period variation in seconds per year (dPdt [s/y]) | 0.037654 |
| Cyclic period variation in years (Pc [y]) | 14.3 |
| Designation | Gaia DR2 1400549875578714240 |
|---|---|
| RA | 241:30:32.49828 |
| DEC | 50:11:13.409376 |
| l | 78.52754449 |
| b | 46.61328735 |
| G magnitude | 9.970996 |
| G_bp magnitude | 10.337123 |
| G_rp magnitude | 9.449481 |
| Radial velocity [km/s] | |
| Parallax | 5.835473198 |
| Distance [pc] | 171.365709 |
| Temperature [K] | 5601 |
| Radius [R] | 1.6016399 |
| Luminosity [L] | 2.2745042 |
| Simbad link | V842 Her |
|---|---|
| J magnitude | 8.755 |
| H magnitude | 8.52 |
| K magnitude | 8.428 |
| Johnson_U magnitude | 12.926 |
| Johnson_B magnitude | 10.5 |
| Johnson_V magnitude | 9.979 |
| Johnson_R magnitude | 9.781 |
| Johnson_I magnitude | |
| Sloan_u magnitude | 14.998 |
| Sloan_g magnitude | 14.116 |
| Sloan_r magnitude | 9.781 |
| Sloan_i magnitude | 12.926 |
| Sloan_z magnitude | 10.015 |