Proxima Cen d
An artistic scene associated with Proxima Cen d. 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
This illustration is associated with Proxima Cen d, a catalogued exoplanet orbiting Proxima Cen. The available catalog measurements below describe the real system; they do not establish the illustrated scenery.
Available measurements
Host: Proxima Cen · 3 catalog star(s) · Rocky-size candidate
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 | 0.692 | Earth radii | Calculated Value |
| Planet mass | 0.26 [+0.038 / -0.038] | Earth masses | Suárez Mascareño et al. 2025 |
| Bulk density | 4.31 | g/cm³ | Calculated Value |
| Orbital period | 5.1234 [+0.00035 / -0.00035] | days | Suárez Mascareño et al. 2025 |
| Orbital semimajor axis | 0.02881 [+0.00017 / -0.00017] | AU | Suárez Mascareño et al. 2025 |
| Orbital eccentricity | 0 | Suárez Mascareño et al. 2025 | |
| Orbital inclination | Unknown | degrees | Source not supplied |
| Irradiation | 1.814 [+0.098 / -0.098] | Earth flux | Suárez Mascareño et al. 2025 |
| Equilibrium temperature | 282 [+23 / -23] | K; not surface temperature | Suárez Mascareño et al. 2025 |
| Catalog stellar effective temperature | 2,900 [+100 / -100] | K | Suárez Mascareño et al. 2025 |
| Catalog stellar radius | 0.141 [+0.021 / -0.021] | Solar radii | Suárez Mascareño et al. 2025 |
| Catalog stellar mass | 0.1221 [+0.0022 / -0.0022] | Solar masses | Suárez Mascareño et al. 2025 |
| Catalog stellar luminosity | -2.821 [+0.02242 / -0.02364] | log10 Solar luminosity | Suárez Mascareño et al. 2025 |
| Catalog stellar age | Unknown | Gyr | Source not supplied |
| Catalog stellar metallicity | Unknown | dex | Source not supplied |
| System distance | 1.3012 [+0.00034 / -0.00035] | pc | TICv8 |
What about life?
Incident flux lies outside the broad triage window. This does not exclude subsurface habitats or unusual atmospheres; a climate model is required. Radius is estimated from a minimum mass, so even the size/composition inference is especially uncertain. No confirmed life; no planet-specific biosignature literature review in this release.