FU Dra
| Simbad link | FU Dra |
|---|---|
| Source publication | Liu, Liang (2012) - The Active Contact Binary FU Draconis: Four Color Light Curves and Period Changes |
| ADS link | 2012PASJ...64...48L |
| Name in Source publication | FU Dra |
| Orbital period in days (P [d]) | 0.306718 |
| Mass ratio (q) | 0.25 |
| Mass ratio determination | Spectroscopic |
| Temperature determination | Unknown |
| Type | W |
| Has total eclipse? | |
| Has spots? | |
| Has third light? | |
| Has period variation? |
| Solver | WD |
|---|---|
| Orbital period in days (P [d]) | 0.306718 |
| Mass ratio (q) | 0.25 |
| Orbital inclination in degrees (i [o]) | 80.4 |
| Fillout (f) | 0.27 |
| Primary temperature in Kelvins (T1 [K]) | 5823 |
| Secondary temperature in Kelvins (T2 [K]) | 6100 |
| Primary polar radius in units of orbital separation (r1p) | 0.4793 |
| Secondary polar radius in units of orbital separation (r2p) | 0.2586 |
| Surface potential (Ω) | 2.3122 |
| Orbital separation in solar radii (a [R]) | 2.14 |
|---|---|
| Primary radius in solar units (R1 [R]) | 1.1 |
| Secondary radius in solar units (R2 [R]) | 0.6 |
| Primary mass in solar units (M1 [M]) | 1.12 |
| Secondary mass in solar units (M2 [M]) | 0.28 |
| Primary temperature in kelvins (T1 [K]) | 5823 |
| Secondary temperature in Kelvins (T2 [K]) | 6100 |
| Primary luminosity in solar units (L1 [L]) | 1.26 |
| Secondary luminosity in solar units (L2 [L]) | 0.45 |
| Distance in parsecs (d [pc]) | |
| Age in gigayears (τ [gyr]) | 4.87 |
| Orbital period in days (P [d]) | 0.306718 |
|---|---|
| Monotonic period variation in seconds per year (dPdt [s/y]) | 0.007603 |
| Cyclic period variation in years (Pc [y]) | 7.8 |
| Designation | Gaia DR2 1639708154429199104 |
|---|---|
| RA | 233:41:09.6576 |
| DEC | 62:16:44.637852 |
| l | 97.06942066 |
| b | 45.80011904 |
| G [mag] | 10.523665 |
| G_bp [mag] | 10.882959 |
| G_rp [mag] | 10.051109 |
| Parallax | 6.210296068 |
| Distance [pc] | 4.21E-08 |
| Temperature [K] | 5730 |
| Surface gravity log(g) [cm/s2] | |
| Metallicity [Fe/H] | |
| Monochromatic extinction A0 [mag] | |
| Radius [R] | 1.1093931 |
| Luminosity [L] | 1.19532 |
| Simbad link | FU Dra |
|---|---|
| J magnitude | 9.684 |
| H magnitude | 9.315 |
| K magnitude | 9.216 |
| Johnson_U magnitude | |
| Johnson_B magnitude | |
| Johnson_V magnitude | |
| Johnson_R magnitude | 10.1 |
| Johnson_I magnitude | |
| Sloan_u magnitude | |
| Sloan_g magnitude | 10.5237 |
| Sloan_r magnitude | 10.1 |
| Sloan_i magnitude | |
| Sloan_z magnitude |