PP Lac
| Simbad link | PP Lac |
|---|---|
| Source publication | Kjurkchieva, Diana P. (2020) - Global parameters of the totally-eclipsing W UMa stars NSVS 6673994, NSVS 4316778, PP Lac and NSVS 1926064 |
| ADS link | 2020NewA...7701352K |
| Name in Source publication | PP Lac |
| Orbital period in days (P [d]) | 0.401163 |
| Mass ratio (q) | 0.39 |
| Mass ratio determination | Photometric |
| Type | W |
| Has total eclipse? | |
| Has spots? | |
| Has third light? | |
| Has period variation? |
| Solver | PHOEBE |
|---|---|
| Orbital period in days (P [d]) | 0.401163 |
| Mass ratio (q) | 0.39 |
| Orbital inclination in degrees (i [o]) | 84.7 |
| Fillout (f) | 0.27 |
| Primary temperature in Kelvins (T1 [K]) | 5890 |
| Secondary temperature in Kelvins (T2 [K]) | 6260 |
| Primary polar radius in units of orbital separation (r1p) | 0.4467 |
| Secondary polar radius in units of orbital separation (r2p) | 0.2938 |
| Surface potential (Ω) | 2.5959 |
| Orbital separation in solar radii (a [R]) | 2.78 |
|---|---|
| Primary radius in solar units (R1 [R]) | 1.34 |
| Secondary radius in solar units (R2 [R]) | 0.89 |
| Primary mass in solar units (M1 [M]) | 1.28 |
| Secondary mass in solar units (M2 [M]) | 0.5 |
| Primary temperature in kelvins (T1 [K]) | 5890 |
| Secondary temperature in Kelvins (T2 [K]) | 6260 |
| Primary luminosity in solar units (L1 [L]) | 1.93 |
| Secondary luminosity in solar units (L2 [L]) | 1.08 |
| Distance in parsecs (d [pc]) | |
| Age in gigayears (τ [gyr]) | 3.36 |
| Orbital period in days (P [d]) | 0.401163 |
|---|---|
| Monotonic period variation in seconds per year (dPdt [s/y]) | |
| Cyclic period variation in years (Pc [y]) | 19.7 |
| Period study | Qian, S. -B. (2005) - The first CCD photometric study of the neglected W UMa-type binary PP Lacertae |
| ADS link | 2005NewA...11...52Q |
| Designation | Gaia DR2 2002302453348903296 |
|---|---|
| RA | 340:39:39.8556 |
| DEC | 53:25:02.52894 |
| l | 104.349913 |
| b | -4.743114682 |
| G magnitude | 11.665489 |
| G_bp magnitude | 12.059604 |
| G_rp magnitude | 11.084525 |
| Radial velocity [km/s] | |
| Parallax | 3.129556724 |
| Distance [pc] | 319.534071 |
| Temperature [K] | 5220 |
| Radius [R] | 1.6117802 |
| Luminosity [L] | 1.7377542 |
| Simbad link | PP Lac |
|---|---|
| J magnitude | 10.653 |
| H magnitude | 10.334 |
| K magnitude | 10.244 |
| Johnson_U magnitude | |
| Johnson_B magnitude | 12.65 |
| Johnson_V magnitude | 11.85 |
| Johnson_R magnitude | |
| Johnson_I magnitude | |
| Sloan_u magnitude | |
| Sloan_g magnitude | 11.6655 |
| Sloan_r magnitude | |
| Sloan_i magnitude | |
| Sloan_z magnitude |