EF Boo
| Simbad link | EF Boo |
|---|---|
| Source publication | Gazeas, K. D. (2005) - Physical Parameters of Components in Close Binary Systems: IV |
| ADS link | 2005AcA....55..123G |
| Name in Source publication | EF Boo |
| Orbital period in days (P [d]) | 0.420514 |
| Mass ratio (q) | 0.53 |
| 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]) | 0.420514 |
| Mass ratio (q) | 0.53 |
| Orbital inclination in degrees (i [o]) | 75.7 |
| Fillout (f) | 0.25 |
| Primary temperature in Kelvins (T1 [K]) | 6425 |
| Secondary temperature in Kelvins (T2 [K]) | 6450 |
| Primary polar radius in units of orbital separation (r1p) | 0.4219 |
| Secondary polar radius in units of orbital separation (r2p) | 0.3186 |
| Surface potential (Ω) | 2.8629 |
| Orbital separation in solar radii (a [R]) | 3.14 |
|---|---|
| Primary radius in solar units (R1 [R]) | 1.43 |
| Secondary radius in solar units (R2 [R]) | 1.06 |
| Primary mass in solar units (M1 [M]) | 1.55 |
| Secondary mass in solar units (M2 [M]) | 0.79 |
| Primary temperature in kelvins (T1 [K]) | 6425 |
| Secondary temperature in Kelvins (T2 [K]) | 6450 |
| Primary luminosity in solar units (L1 [L]) | 3.08 |
| Secondary luminosity in solar units (L2 [L]) | 1.73 |
| Distance in parsecs (d [pc]) | |
| Age in gigayears (τ [gyr]) | 2.71 |
| Orbital period in days (P [d]) | 0.420514 |
|---|---|
| Monotonic period variation in seconds per year (dPdt [s/y]) | 0.022663 |
| Cyclic period variation in years (Pc [y]) | |
| Period study | Yu, Yun-Xia (2017) - Orbital period variations of two W UMa-type binaries: UY UMa and EF Boo |
| ADS link | 2017NewA...55...13Y |
| Designation | Gaia DR2 1603817861516048640 |
|---|---|
| RA | 218:07:37.27956 |
| DEC | 50:49:40.08522 |
| l | 90.81323759 |
| b | 59.52837829 |
| G magnitude | 9.392802 |
| G_bp magnitude | 9.662962 |
| G_rp magnitude | 8.997514 |
| Radial velocity [km/s] | |
| Parallax | 6.15166969 |
| Distance [pc] | 162.557493 |
| Temperature [K] | 6196.467 |
| Radius [R] | 1.5962459 |
| Luminosity [L] | 3.3843153 |
| Simbad link | EF Boo |
|---|---|
| J magnitude | 8.707 |
| H magnitude | 8.478 |
| K magnitude | 8.41 |
| Johnson_U magnitude | 9.96 |
| Johnson_B magnitude | 9.95 |
| Johnson_V magnitude | 9.45 |
| Johnson_R magnitude | 9.14 |
| Johnson_I magnitude | |
| Sloan_u magnitude | 9.96 |
| Sloan_g magnitude | 9.3928 |
| Sloan_r magnitude | 9.14 |
| Sloan_i magnitude | |
| Sloan_z magnitude |