Astronomical evidence
Kepler-38 b is a transiting circumbinary planet: it orbits both members of an eclipsing stellar pair. Its saved catalog period is 105.599 days. Transit geometry constrains the planet's radius and orbit; the saved mass entry is an upper limit, not a measured mass of exactly 122 Earth masses. [1,2] The two visible suns interpret the binary nature of the system. Their rendered separation and angular sizes do not reconstruct a particular date.
The illustrated viewpoint
Bronze humanoid with swept-back cranial ridges in a seated extension with one upright open palm. Copper sandstone cliff sanctuary above a rust-red mesa basin. The foreground belongs to an invented solid moon, not the gas-rich planet itself. No such moon, cliff sanctuary, atmosphere, organism or culture has been detected. The landscape, star colors, apparent stellar sizes and illumination are artistic; no satellite orbit or surface climate has been validated.
The foreground belongs to an invented solid moon, not the gas-rich planet itself. No such moon, cliff sanctuary, atmosphere, organism or culture has been detected. The landscape, star colors, apparent stellar sizes and illumination are artistic; no satellite orbit or surface climate has been validated. All warriors and cultures are fictional. Peace and strength are visual themes; no character thoughts, teachings or biological cosmic-energy mechanism are supplied.
Catalog measurements & sources
Host: Kepler-38. 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 | 4.3 (+0.11 / -0.11) | Orosz et al. 2012 |
| Mass · Earth masses | ≤ 122 | Orosz et al. 2012 |
| Density · g/cm³ | Unknown | Not supplied |
| Orbital period · days | 105.599 (+0.038 / -0.053) | Orosz et al. 2012 |
| Orbital semimajor axis · AU | 0.4632 (+0.0082 / -0.0092) | Orosz et al. 2012 |
| Eccentricity | ≤ 0.032 | Orosz et al. 2012 |
| Inclination · degrees | 89.442 (+0.03 / -0.026) | Orosz et al. 2012 |
| Irradiation · Earth flux | 14.4568 (+0.9452 / -0.9452) | Calculated Value |
| Equilibrium temperature · K | 475 | Orosz et al. 2012 |
| Stellar effective temperature · K | 5623 (+50 / -50) | Orosz et al. 2012 |
| Stellar radius · Solar | 1.752 (+0.031 / -0.034) | Orosz et al. 2012 |
| Stellar mass · Solar | 0.941 (+0.055 / -0.059) | Orosz et al. 2012 |
| Stellar luminosity · log Solar | 0.49161 (+0.02262 / -0.02386) | Gaia DR2 |
| Stellar age · Gyr | 10 (+3 / -3) | Orosz et al. 2012 |
| Stellar metallicity · dex | -0.11 (+0.08 / -0.08) | Orosz et al. 2012 |
| Distance · pc | 1174.59 (+20.53 / -19.85) | TICv8 |