LS Del
| Simbad link | LS Del |
|---|---|
| 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 | 205710+1938.8 |
| Orbital period in days (P [d]) | 0.363842 |
| Mass ratio (q) | 0.37 |
| 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]) | 0.363842 |
| Mass ratio (q) | 0.37 |
| Orbital inclination in degrees (i [o]) | 45.2 |
| Fillout (f) | 0.2 |
| Primary temperature in Kelvins (T1 [K]) | 6192 |
| Secondary temperature in Kelvins (T2 [K]) | 6250 |
| Primary polar radius in units of orbital separation (r1p) | 0.4466 |
| Secondary polar radius in units of orbital separation (r2p) | 0.2868 |
| Surface potential (Ω) | 2.5814 |
| Orbital separation in solar radii (a [R]) | 2.57 |
|---|---|
| Primary radius in solar units (R1 [R]) | 1.23 |
| Secondary radius in solar units (R2 [R]) | 0.79 |
| Primary mass in solar units (M1 [M]) | 1.25 |
| Secondary mass in solar units (M2 [M]) | 0.47 |
| Primary temperature in kelvins (T1 [K]) | 6192 |
| Secondary temperature in Kelvins (T2 [K]) | 6250 |
| Primary luminosity in solar units (L1 [L]) | 1.99 |
| Secondary luminosity in solar units (L2 [L]) | 0.93 |
| Distance in parsecs (d [pc]) | |
| Age in gigayears (τ [gyr]) | 3.64 |
| Orbital period in days (P [d]) | 0.363842 |
|---|---|
| Monotonic period variation in seconds per year (dPdt [s/y]) | 0.01944 |
| Cyclic period variation in years (Pc [y]) | |
| Period study | Qian, Shengbang (2001) - A possible relation between the period change and the mass ratio for W-type contact binaries |
| ADS link | 2001MNRAS.328..635Q |
| Designation | Gaia DR2 1813514756363926400 |
|---|---|
| RA | 314:17:36.68316 |
| DEC | 19:39:00.556056 |
| l | 66.00226419 |
| b | -16.48576265 |
| G magnitude | 8.581913 |
| G_bp magnitude | 8.868897 |
| G_rp magnitude | 8.152515 |
| Radial velocity [km/s] | |
| Parallax | 10.03999986 |
| Distance [pc] | 99.601595 |
| Temperature [K] | 6086.5073 |
| Radius [R] | 1.4747406 |
| Luminosity [L] | 2.689048 |
| Simbad link | LS Del |
|---|---|
| J magnitude | 7.605 |
| H magnitude | 7.358 |
| K magnitude | 7.297 |
| Johnson_U magnitude | 8.054 |
| Johnson_B magnitude | 9.178 |
| Johnson_V magnitude | 8.722 |
| Johnson_R magnitude | 8.3 |
| Johnson_I magnitude | |
| Sloan_u magnitude | |
| Sloan_g magnitude | 8.5819 |
| Sloan_r magnitude | 8.3 |
| Sloan_i magnitude | 8.054 |
| Sloan_z magnitude |