V640 Ser
| Simbad link | V640 Ser |
|---|---|
| Source publication | Loukaidou, G. A. (2022) - CoBiToM Project - II. Evolution of contact binary systems close to the orbital period cut-off |
| ADS link | 2022MNRAS.514.5528L |
| Name in Source publication | 2MASS J15165453+0048263 |
| Orbital period in days (P [d]) | 0.210732 |
| Mass ratio (q) | 0.58 |
| Mass ratio determination | Photometric |
| Temperature determination | Color index |
| Type | Unspecified |
| Has total eclipse? | |
| Has spots? | |
| Has third light? | |
| Has period variation? | |
| Search TESS catalog of Eclipsing Binaries | TIC 461277180 |
| Solver | WD |
|---|---|
| Orbital period in days (P [d]) | 0.210732 |
| Mass ratio (q) | 0.58 |
| Orbital inclination in degrees (i [o]) | 63.7 |
| Fillout (f) | 0.29 |
| Primary temperature in Kelvins (T1 [K]) | 6150 |
| Secondary temperature in Kelvins (T2 [K]) | 6095 |
| Primary polar radius in units of orbital separation (r1p) | |
| Secondary polar radius in units of orbital separation (r2p) | |
| Surface potential (Ω) | 2.933 |
| Orbital separation in solar radii (a [R]) | |
|---|---|
| Primary radius in solar units (R1 [R]) | 0.74 |
| Secondary radius in solar units (R2 [R]) | 0.56 |
| Primary mass in solar units (M1 [M]) | 0.81 |
| Secondary mass in solar units (M2 [M]) | 0.24 |
| Primary temperature in kelvins (T1 [K]) | 6150 |
| Secondary temperature in Kelvins (T2 [K]) | 6095 |
| Primary luminosity in solar units (L1 [L]) | 0.71 |
| Secondary luminosity in solar units (L2 [L]) | 0.38 |
| Distance in parsecs (d [pc]) | |
| Age in gigayears (τ [gyr]) |
| Host | Longitude λ [o] | Latitude β [o] | Angular radius σ [o] | Temperature contrast Tspot/Tstar |
|---|---|---|---|---|
| Primary | 230.7 | 13.2 | 0.653 |
| Designation | Gaia DR3 4419128998026822784 |
|---|---|
| RA | 229:13:37.977034 |
| DEC | 0:48:26.601137 |
| l | 2.0499877639241086 |
| b | 46.302505397878896 |
| G [mag] | 14.756697 |
| G_bp [mag] | 15.451058 |
| G_rp [mag] | 13.9107895 |
| Parallax | 2.611043947997805 |
| Distance [pc] | 377.4393 |
| Temperature [K] | 4320.287 |
| Surface gravity log(g) [cm/s2] | 4.4976 |
| Metallicity [Fe/H] | -0.0686 |
| Monochromatic extinction A0 [mag] | 0.1927 |
| Radius [R] | |
| Luminosity [L] |
| Simbad link | V640 Ser |
|---|---|
| J magnitude | 12.821 |
| H magnitude | 12.164 |
| K magnitude | 12.038 |
| Johnson_U magnitude | |
| Johnson_B magnitude | |
| Johnson_V magnitude | 14.61 |
| Johnson_R magnitude | |
| Johnson_I magnitude | |
| Sloan_u magnitude | 18.327 |
| Sloan_g magnitude | 15.976 |
| Sloan_r magnitude | 14.887 |
| Sloan_i magnitude | 14.422 |
| Sloan_z magnitude | 14.152 |