Astronomical evidence
HD 80606 b orbits HD 80606. The saved catalog gives an orbital period of 111.436765 ± 7.4e-05 days. Its discovery method is recorded as radial velocity. These quantities describe the real astronomical setting behind the illustration. HD 80606 b has a strongly elongated orbit. The saved eccentricity is 0.93183 ± 0.00014. For an ideal Keplerian ellipse, the ratio of apastron to periastron distance is (1 + e)/(1 − e), about 28.3 using that central value. This is a calculated distance ratio, not a temperature ratio; atmospheric response has its own timescale. The catalog radius is 11.56766808 ± 0.168135 Earth radii. The mass entry is 1323.46926959 ± 1.49379 Earth masses. The source papers and full table retain the provenance of each parameter.
The illustrated viewpoint
The observer’s eclipse and orbital shelter are invented. The epoch, trajectory and geometry required to hide the stellar disk have not been solved for this illustration.
The observer’s eclipse and orbital shelter are invented. The epoch, trajectory and geometry required to hide the stellar disk have not been solved for this illustration. All depicted life and technology are fictional.
Catalog measurements & sources
Host: HD 80606. Snapshot: 25 September 2026. Errors, limits and source provenance are retained. Calculated values and model estimates are not direct measurements. Unknown is not zero; equilibrium temperature is not surface temperature.
| Quantity / unit | Value / reported errors | Source |
|---|---|---|
| Radius · Earth radii | 11.5677 (+0.168135 / -0.168135) | Pearson et al. 2022 |
| Mass · Earth masses | 1323.47 (+1.49379 / -1.49379) | Pearson et al. 2022 |
| Density · g/cm³ | 5.08 (+0.32 / -0.32) | Southworth 2011 |
| Orbital period · days | 111.437 (+7.4e-05 / -7.4e-05) | Pearson et al. 2022 |
| Orbital semimajor axis · AU | 0.4603 (+0.0021 / -0.0021) | Pearson et al. 2022 |
| Eccentricity | 0.93183 (+0.00014 / -0.00014) | Pearson et al. 2022 |
| Inclination · degrees | 89.24 (+0.01 / -0.01) | Pearson et al. 2022 |
| Irradiation · Earth flux | 4.6941 (+0.1147 / -0.1147) | Calculated Value |
| Equilibrium temperature · K | 405 (+7 / -7) | Southworth 2011 |
| Stellar effective temperature · K | 5565 | Pearson et al. 2022 |
| Stellar radius · Solar | 1.05 (+0.01 / -0.01) | Pearson et al. 2022 |
| Stellar mass · Solar | 1.05 | Pearson et al. 2022 |
| Stellar luminosity · log Solar | -0.00237 (+0.00874 / -0.01095) | Wittenmyer et al. 2007 |
| Stellar age · Gyr | 5.9 (+1.6 / -2) | Bonomo et al. 2017 |
| Stellar metallicity · dex | 0.35 | Pearson et al. 2022 |
| Distance · pc | 66.4711 (+0.1612 / -0.1604) | TICv8 |