The tilted horizon
An artistic scene associated with Kepler-413 b. The scientific record below anchors the setting; it does not establish the depicted environment.
The imagined scene
The host system is real. All alien organisms, robots, societies and social histories are fictional. Moons, rings, terrain and weather are artistic assumptions unless specifically supported by a cited source. These images are not calibrated simulations of the sky.
The scientific anchor
The real planet orbits two stars; its catalog orbital period is 66.262 days and radius is 4.347 Earth radii. It is gas-rich: this scene uses an orbital habitat, not an established habitable planetary surface. All pictured moons and humanoids are fictional.
Available measurements
Host: Kepler-413 · 2 catalog star(s) · Sub-Neptune / Neptune-size
NASA composite catalog values may combine different papers. Errors and upper/lower limits are retained. “Calculated Value” means derived or estimated. Msini is a minimum mass. Missing values are unknown. A multiple-star system’s single stellar row does not describe every component. Equilibrium temperature is not a measured surface temperature.
| Quantity | Value & uncertainty | Unit | Paper / source |
|---|---|---|---|
| Planet radius | 4.347 [+0.099 / -0.099] | Earth radii | Kostov et al. 2014 |
| Planet mass | 67 [+22 / -21] | Earth masses | Kostov et al. 2014 |
| Bulk density | 3.2 [+1 / -1] | g/cm³ | Kostov et al. 2014 |
| Orbital period | 66.262 [+0.024 / -0.021] | days | Kostov et al. 2014 |
| Orbital semimajor axis | 0.3553 [+0.002 / -0.0018] | AU | Kostov et al. 2014 |
| Orbital eccentricity | 0.1181 [+0.0018 / -0.0017] | Kostov et al. 2014 | |
| Orbital inclination | 89.929 [+0.024 / -0.016] | degrees | Kostov et al. 2014 |
| Irradiation | 2.9436 [+0.1909 / -0.1909] | Earth flux | Calculated Value |
| Equilibrium temperature | 334.96 | K; not surface temperature | Calculated Value |
| Catalog stellar effective temperature | 4,700 | K | Kostov et al. 2014 |
| Catalog stellar radius | 0.7761 [+0.0088 / -0.0096] | Solar radii | Kostov et al. 2014 |
| Catalog stellar mass | 0.82 [+0.015 / -0.014] | Solar masses | Kostov et al. 2014 |
| Catalog stellar luminosity | -0.42994 [+0.02689 / -0.02867] | log10 Solar luminosity | Gaia DR2 |
| Catalog stellar age | Unknown | Gyr | Source not supplied |
| Catalog stellar metallicity | -0.2 | dex | Kostov et al. 2014 |
| System distance | 847.54 [+22.587 / -21.464] | pc | TICv8 |
What about life?
A substantial volatile envelope is plausible. A habitable ocean or surface cannot be inferred from radius; atmosphere and interior research required. No confirmed life; no planet-specific biosignature literature review in this release.