YY Eri
| Simbad link | YY Eri |
|---|---|
| Source publication | Yang, Y. (1999) - Photometric study of the late-type contact binary YY Eridani |
| ADS link | 1999A&AS..136..139Y |
| Name in Source publication | YY Eri |
| Orbital period in days (P [d]) | 0.32165 |
| Mass ratio (q) | 0.45 |
| 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]) | 0.32165 |
| Mass ratio (q) | 0.45 |
| Orbital inclination in degrees (i [o]) | 82.1 |
| Fillout (f) | 0.05 |
| Primary temperature in Kelvins (T1 [K]) | 5349 |
| Secondary temperature in Kelvins (T2 [K]) | 5600 |
| Primary polar radius in units of orbital separation (r1p) | 0.4248 |
| Secondary polar radius in units of orbital separation (r2p) | 0.2947 |
| Surface potential (Ω) | 2.7714 |
| Orbital separation in solar radii (a [R]) | |
|---|---|
| Primary radius in solar units (R1 [R]) | |
| Secondary radius in solar units (R2 [R]) | |
| Primary mass in solar units (M1 [M]) | |
| Secondary mass in solar units (M2 [M]) | |
| Primary temperature in kelvins (T1 [K]) | 5349 |
| Secondary temperature in Kelvins (T2 [K]) | 5600 |
| Primary luminosity in solar units (L1 [L]) | |
| Secondary luminosity in solar units (L2 [L]) | |
| Distance in parsecs (d [pc]) | |
| Age in gigayears (τ [gyr]) |
| Orbital period in days (P [d]) | 0.32165 |
|---|---|
| Monotonic period variation in seconds per year (dPdt [s/y]) | 0.005513 |
| Cyclic period variation in years (Pc [y]) | 38.62 |
| Period study | Yu, Ting (2018) - Orbital period changes of the W UMa binary YY Eri |
| ADS link | 2018RAA....18..106Y |
| Designation | Gaia DR2 3191950017134972928 |
|---|---|
| RA | 63:02:10.969296 |
| DEC | -11:31:48.175104 |
| l | 203.5022775 |
| b | -40.0411183 |
| G magnitude | 8.438673 |
| G_bp magnitude | 8.778461 |
| G_rp magnitude | 7.886783 |
| Radial velocity [km/s] | |
| Parallax | 17.76583635 |
| Distance [pc] | 56.287809 |
| Temperature [K] | 5517.25 |
| Radius [R] | 1.1022443 |
| Luminosity [L] | 1.0142407 |
| Simbad link | YY Eri |
|---|---|
| J magnitude | 7.031 |
| H magnitude | 6.694 |
| K magnitude | 6.588 |
| Johnson_U magnitude | 7.673 |
| Johnson_B magnitude | 9.08 |
| Johnson_V magnitude | 8.41 |
| Johnson_R magnitude | |
| Johnson_I magnitude | |
| Sloan_u magnitude | |
| Sloan_g magnitude | 8.4387 |
| Sloan_r magnitude | |
| Sloan_i magnitude | 7.673 |
| Sloan_z magnitude |