EQ Tau
| Simbad link | EQ Tau |
|---|---|
| Source publication | Hasanzadeh, A. (2015) - New light curve analysis and period changes of the overcontact binary EQ Tauri |
| ADS link | 2015NewA...34..262H |
| Name in Source publication | EQ Tau |
| Orbital period in days (P [d]) | 0.341347 |
| Mass ratio (q) | 0.44 |
| Mass ratio determination | Spectroscopic |
| Type | A |
| Has total eclipse? | |
| Has spots? | |
| Has third light? | |
| Has period variation? |
| Solver | PHOEBE |
|---|---|
| Orbital period in days (P [d]) | 0.341347 |
| Mass ratio (q) | 0.44 |
| Orbital inclination in degrees (i [o]) | 84.5 |
| Fillout (f) | 0.09 |
| Primary temperature in Kelvins (T1 [K]) | 5800 |
| Secondary temperature in Kelvins (T2 [K]) | 5730 |
| Primary polar radius in units of orbital separation (r1p) | 0.4294 |
| Secondary polar radius in units of orbital separation (r2p) | 0.2942 |
| Surface potential (Ω) | 2.732 |
| Orbital separation in solar radii (a [R]) | 2.49 |
|---|---|
| Primary radius in solar units (R1 [R]) | 1.14 |
| Secondary radius in solar units (R2 [R]) | 0.79 |
| Primary mass in solar units (M1 [M]) | 1.23 |
| Secondary mass in solar units (M2 [M]) | 0.54 |
| Primary temperature in kelvins (T1 [K]) | 5800 |
| Secondary temperature in Kelvins (T2 [K]) | 5730 |
| Primary luminosity in solar units (L1 [L]) | 1.33 |
| Secondary luminosity in solar units (L2 [L]) | 0.61 |
| Distance in parsecs (d [pc]) | |
| Age in gigayears (τ [gyr]) | 9.3 |
| Orbital period in days (P [d]) | 0.341347 |
|---|---|
| Monotonic period variation in seconds per year (dPdt [s/y]) | |
| Cyclic period variation in years (Pc [y]) | 49 |
| Designation | Gaia DR2 64013807487711360 |
|---|---|
| RA | 57:03:22.7016 |
| DEC | 22:18:50.449428 |
| l | 168.1357767 |
| b | -24.65580018 |
| G magnitude | 11.15964 |
| G_bp magnitude | 11.454609 |
| G_rp magnitude | 10.559733 |
| Radial velocity [km/s] | |
| Parallax | 4.421346539 |
| Distance [pc] | 226.17544 |
| Temperature [K] | 5602.3 |
| Radius [R] | 1.2221706 |
| Luminosity [L] | 1.3256345 |
| Simbad link | EQ Tau |
|---|---|
| J magnitude | 9.81 |
| H magnitude | 9.537 |
| K magnitude | 9.434 |
| Johnson_U magnitude | |
| Johnson_B magnitude | 12.04 |
| Johnson_V magnitude | 11.18 |
| Johnson_R magnitude | |
| Johnson_I magnitude | |
| Sloan_u magnitude | |
| Sloan_g magnitude | 11.1596 |
| Sloan_r magnitude | |
| Sloan_i magnitude | |
| Sloan_z magnitude |