Astronomical evidence
Kepler-186 f orbits Kepler-186. The saved catalog gives an orbital period of 129.9441 (+0.0013/−0.0012) days. Its discovery method is recorded as transit. These quantities describe the real astronomical setting behind the illustration. Kepler-186 f illustrates the difference between a measured transit radius and an estimated mass. The saved mass is derived from a mass–radius relationship, not a dynamical mass measurement. The local archive snapshot also carries a controversial-status flag; that flag is retained rather than silently presenting the entry as uncontested. The catalog radius is 1.17 ± 0.08 Earth radii. The listed mass of 1.71 Earth masses is inferred from a mass–radius relationship. The source papers and full table retain the provenance of each parameter.
The illustrated viewpoint
The nocturnal ridge and sky are invented. Radius alone does not establish atmospheric retention, surface gravity, climate or the particular terrain depicted.
The nocturnal ridge and sky are invented. Radius alone does not establish atmospheric retention, surface gravity, climate or the particular terrain depicted. All depicted life and technology are fictional.
Catalog measurements & sources
Host: Kepler-186. 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 | 1.17 (+0.08 / -0.08) | Torres et al. 2015 |
| Mass · Earth masses | 1.71 | Calculated Value |
| Density · g/cm³ | 5.87 | Calculated Value |
| Orbital period · days | 129.944 (+0.0013 / -0.0012) | Torres et al. 2015 |
| Orbital semimajor axis · AU | 0.432 (+0.171 / -0.053) | Torres et al. 2015 |
| Eccentricity | ≥ 0.04 (+0.07 / -0.04) | Torres et al. 2015 |
| Inclination · degrees | 89.96 (+0.04 / -0.1) | Torres et al. 2015 |
| Irradiation · Earth flux | 0.3 (+0.1 / -0.15) | Torres et al. 2015 |
| Equilibrium temperature · K | 177 | Q1-Q17 DR25 KOI Table |
| Stellar effective temperature · K | 3755 (+90 / -90) | Torres et al. 2015 |
| Stellar radius · Solar | 0.523 (+0.023 / -0.021) | Torres et al. 2015 |
| Stellar mass · Solar | 0.544 (+0.024 / -0.021) | Torres et al. 2015 |
| Stellar luminosity · log Solar | -1.26 (+0.079 / -0.05) | Torres et al. 2015 |
| Stellar age · Gyr | 4 (+0.6 / -0.6) | Torres et al. 2015 |
| Stellar metallicity · dex | -0.26 (+0.12 / -0.12) | Torres et al. 2015 |
| Distance · pc | 177.594 (+0.774 / -0.774) | TICv8 |