V839 Oph
| Simbad link | V839 Oph |
|---|---|
| Source publication | Deb, Sukanta (2011) - Physical parameters of 62 eclipsing binary stars using the All Sky Automated Survey-3 data - I |
| ADS link | 2011MNRAS.412.1787D |
| Name in Source publication | 180921+0909.1 |
| Orbital period in days (P [d]) | 0.409008 |
| Mass ratio (q) | 0.31 |
| 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]) | 0.409008 |
| Mass ratio (q) | 0.31 |
| Orbital inclination in degrees (i [o]) | 80.2 |
| Fillout (f) | 0.6 |
| Primary temperature in Kelvins (T1 [K]) | 6381 |
| Secondary temperature in Kelvins (T2 [K]) | 6424 |
| Primary polar radius in units of orbital separation (r1p) | 0.4789 |
| Secondary polar radius in units of orbital separation (r2p) | 0.2891 |
| Surface potential (Ω) | 2.363 |
| Orbital separation in solar radii (a [R]) | 2.98 |
|---|---|
| Primary radius in solar units (R1 [R]) | 1.55 |
| Secondary radius in solar units (R2 [R]) | 0.95 |
| Primary mass in solar units (M1 [M]) | 1.63 |
| Secondary mass in solar units (M2 [M]) | 0.5 |
| Primary temperature in kelvins (T1 [K]) | 6381 |
| Secondary temperature in Kelvins (T2 [K]) | 6424 |
| Primary luminosity in solar units (L1 [L]) | 3.55 |
| Secondary luminosity in solar units (L2 [L]) | 1.39 |
| Distance in parsecs (d [pc]) | |
| Age in gigayears (τ [gyr]) | 2.69 |
| Orbital period in days (P [d]) | 0.409008 |
|---|---|
| Monotonic period variation in seconds per year (dPdt [s/y]) | 0.027994 |
| Cyclic period variation in years (Pc [y]) | 36.7 |
| Period study | Hanna, Magdy A. (2010) - Period Variation Study of the A-Type W UMa Eclipsing Binary V839 Oph |
| ADS link | 2010JKAS...43..201H |
| Designation | Gaia DR2 4481606508598024064 |
|---|---|
| RA | 272:20:18.46752 |
| DEC | 9:09:03.622007 |
| l | 36.43020592 |
| b | 13.47130936 |
| G magnitude | 8.825685 |
| G_bp magnitude | 9.135123 |
| G_rp magnitude | 8.336453 |
| Radial velocity [km/s] | |
| Parallax | 8.703666455 |
| Distance [pc] | 114.894109 |
| Temperature [K] | 5889.025 |
| Radius [R] | 1.6305073 |
| Luminosity [L] | 2.8808048 |
| Simbad link | V839 Oph |
|---|---|
| J magnitude | 7.91 |
| H magnitude | 7.666 |
| K magnitude | 7.566 |
| Johnson_U magnitude | 8.286 |
| Johnson_B magnitude | 9.62 |
| Johnson_V magnitude | 9.03 |
| Johnson_R magnitude | |
| Johnson_I magnitude | |
| Sloan_u magnitude | |
| Sloan_g magnitude | 8.8257 |
| Sloan_r magnitude | |
| Sloan_i magnitude | 8.286 |
| Sloan_z magnitude |