DD Com
| Simbad link | DD Com |
|---|---|
| Source publication | Zhu, L. (2010) - Photometric Study of the Very Short Period Shallow Contact Binary DD Comae Berenices |
| ADS link | 2010AJ....140..215Z |
| Name in Source publication | DD Com |
| Orbital period in days (P [d]) | 0.269206 |
| Mass ratio (q) | 0.27 |
| Mass ratio determination | Photometric |
| Type | W |
| Has total eclipse? | |
| Has spots? | |
| Has third light? | |
| Has period variation? |
| Solver | WD |
|---|---|
| Orbital period in days (P [d]) | 0.269206 |
| Mass ratio (q) | 0.27 |
| Orbital inclination in degrees (i [o]) | 74.4 |
| Fillout (f) | 0.09 |
| Primary temperature in Kelvins (T1 [K]) | 4820 |
| Secondary temperature in Kelvins (T2 [K]) | 5500 |
| Primary polar radius in units of orbital separation (r1p) | 0.467 |
| Secondary polar radius in units of orbital separation (r2p) | 0.2576 |
| Surface potential (Ω) | 2.3876 |
| 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]) | 4820 |
| Secondary temperature in Kelvins (T2 [K]) | 5500 |
| 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]) | 0.269206 |
|---|---|
| Monotonic period variation in seconds per year (dPdt [s/y]) | 0.004009 |
| Cyclic period variation in years (Pc [y]) |
| Designation | Gaia DR2 3952592642265324928 |
|---|---|
| RA | 187:11:33.33156 |
| DEC | 21:43:33.289212 |
| l | 258.0405064 |
| b | 82.53197408 |
| G magnitude | 14.603693 |
| G_bp magnitude | 15.058363 |
| G_rp magnitude | 13.980563 |
| Radial velocity [km/s] | |
| Parallax | 1.475586194 |
| Distance [pc] | 677.696772 |
| Temperature [K] | 5035.93 |
| Radius [R] | 0.965166 |
| Luminosity [L] | 0.5397809 |
| Orbital period [d] | 0.2692061 |
|---|---|
| Temperature [K] | 5339.29 |
| Surface gravity (log(g)) | 4.534 |
| Metallicity ([Fe/H]) | -0.129 |
| Simbad link | DD Com |
|---|---|
| J magnitude | 13.092 |
| H magnitude | 12.702 |
| K magnitude | 12.586 |
| Johnson_U magnitude | 14.083 |
| Johnson_B magnitude | |
| Johnson_V magnitude | 14.6 |
| Johnson_R magnitude | 14.351 |
| Johnson_I magnitude | |
| Sloan_u magnitude | 16.443 |
| Sloan_g magnitude | 14.939 |
| Sloan_r magnitude | 14.351 |
| Sloan_i magnitude | 14.083 |
| Sloan_z magnitude | 14.008 |