Astronomical evidence
Proxima Centauri b was detected through periodic radial-velocity motion of its nearby host star. This method by itself constrains a mass multiplied by an orbital-inclination factor; the saved catalog's mass provenance and source estimates remain visible in the companion data. [1,2] Neither a shoreline nor a satellite follows from that detection. The scene explores one hypothetical surface, with a fictional moon providing its dominant visual form.
The illustrated viewpoint
Small dark-armored alien with a long slate mantle, seen from behind in meditation. A hypothetical calm shoreline on Proxima Centauri b beneath an invented moon. The sea, beach, local atmosphere, reflective liquid, moon and warrior are imagined. Radial velocities do not directly map Proxima b's radius or terrain. The crescent moon is unconfirmed. Its phase and apparent size, and the shoreline's illumination, are artistic choices.
The sea, beach, local atmosphere, reflective liquid, moon and warrior are imagined. Radial velocities do not directly map Proxima b's radius or terrain. The crescent moon is unconfirmed. Its phase and apparent size, and the shoreline's illumination, are artistic choices. All beings and cultures are fictional. Apparent sizes, phases and exposure are artistic, not a calibrated sky simulation. Cosmic connection is a visual theme, not an observed biological mechanism.
Catalog measurements & sources
Host: Proxima Cen. 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 | 1.02 | Calculated Value |
| Mass · Earth masses | 1.055 (+0.055 / -0.055) | Suárez Mascareño et al. 2025 |
| Density · g/cm³ | 5.46 | Calculated Value |
| Orbital period · days | 11.1846 (+0.00053 / -0.00053) | Suárez Mascareño et al. 2025 |
| Orbital semimajor axis · AU | 0.04848 (+0.00029 / -0.00029) | Suárez Mascareño et al. 2025 |
| Eccentricity | 0 | Suárez Mascareño et al. 2025 |
| Inclination · degrees | Unknown | Not supplied |
| Irradiation · Earth flux | 0.641 (+0.065 / -0.065) | Suárez Mascareño et al. 2025 |
| Equilibrium temperature · K | 218 (+18 / -18) | Suárez Mascareño et al. 2025 |
| Stellar effective temperature · K | 2900 (+100 / -100) | Suárez Mascareño et al. 2025 |
| Stellar radius · Solar | 0.141 (+0.021 / -0.021) | Suárez Mascareño et al. 2025 |
| Stellar mass · Solar | 0.1221 (+0.0022 / -0.0022) | Suárez Mascareño et al. 2025 |
| Stellar luminosity · log Solar | -2.82102 (+0.02242 / -0.02364) | Suárez Mascareño et al. 2025 |
| Stellar age · Gyr | Unknown | Not supplied |
| Stellar metallicity · dex | Unknown | Not supplied |
| Distance · pc | 1.30119 (+0.00034 / -0.00035) | TICv8 |