BD +42 2782
| Simbad link | BD +42 2782 |
|---|---|
| Source publication | Lu, Wenxian (2007) - Light-Curve and Radial Velocity Study of the Contact Binary BD +42 2782 |
| ADS link | 2007AJ....133..255L |
| Name in Source publication | BD +42 2782 |
| Orbital period in days (P [d]) | 0.370152 |
| Mass ratio (q) | 0.48 |
| 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]) | 0.370152 |
| Mass ratio (q) | 0.48 |
| Orbital inclination in degrees (i [o]) | 74 |
| Fillout (f) | 0.37 |
| Primary temperature in Kelvins (T1 [K]) | 5850 |
| Secondary temperature in Kelvins (T2 [K]) | 6039 |
| Primary polar radius in units of orbital separation (r1p) | 0.4365 |
| Secondary polar radius in units of orbital separation (r2p) | 0.317 |
| Surface potential (Ω) | 2.7328 |
| Orbital separation in solar radii (a [R]) | 2.75 |
|---|---|
| Primary radius in solar units (R1 [R]) | 1.29 |
| Secondary radius in solar units (R2 [R]) | 0.95 |
| Primary mass in solar units (M1 [M]) | 1.38 |
| Secondary mass in solar units (M2 [M]) | 0.67 |
| Primary temperature in kelvins (T1 [K]) | 5850 |
| Secondary temperature in Kelvins (T2 [K]) | 6039 |
| Primary luminosity in solar units (L1 [L]) | 1.75 |
| Secondary luminosity in solar units (L2 [L]) | 1.05 |
| Distance in parsecs (d [pc]) | |
| Age in gigayears (τ [gyr]) | 3.62 |
| Designation | Gaia DR2 1354723978985824128 |
|---|---|
| RA | 255:20:26.7216 |
| DEC | 42:09:53.241984 |
| l | 66.80381314 |
| b | 37.65323574 |
| G magnitude | 12.610659 |
| G_bp magnitude | 12.996803 |
| G_rp magnitude | 11.635498 |
| Radial velocity [km/s] | |
| Parallax | 7.756591548 |
| Distance [pc] | 128.922607 |
| Temperature [K] | 4777 |
| Radius [R] | 0.52739507 |
| Luminosity [L] | 0.13049318 |
| Simbad link | BD +42 2782 |
|---|---|
| J magnitude | 8.331 |
| H magnitude | 8.047 |
| K magnitude | 7.993 |
| Johnson_U magnitude | 9.183 |
| Johnson_B magnitude | 10.11 |
| Johnson_V magnitude | 9.51 |
| Johnson_R magnitude | 9.303 |
| Johnson_I magnitude | |
| Sloan_u magnitude | |
| Sloan_g magnitude | 9.3448 |
| Sloan_r magnitude | 9.303 |
| Sloan_i magnitude | 9.183 |
| Sloan_z magnitude |