Astronomical evidence
WASP-107 b combines a large radius with a comparatively low mass. The saved catalog lists an orbital period of about 5.72 days and a bulk density near 0.16 g/cm³. Such a low average density concerns the whole planet; it does not give the density of any one cloud layer. JWST spectroscopy supports silicate cloud particles and sulfur dioxide in the atmosphere. During a transit, a small fraction of stellar light passes through the planet’s atmospheric limb. Comparing the apparent transit depth across wavelengths reveals the combined effects of absorption and scattering. Interpreting that spectrum requires atmospheric models. Cloud composition, particle size, gas abundance and temperature can influence the measured features. A supported silicate-cloud interpretation supplies a physical ingredient for the artwork, rather than a photograph of its cloud towers or a measured rainstorm.
The illustrated viewpoint
The panorama imagines an atmospheric vantage. Its visible colors, local weather, altitude and enclosing structure are fictional. The real giant should not be treated as an exposed rocky landscape at the level of its cloud tops.
The panorama imagines an atmospheric vantage. Its visible colors, local weather, altitude and enclosing structure are fictional. The real giant should not be treated as an exposed rocky landscape at the level of its cloud tops. All depicted life and technology are fictional.
Catalog measurements & sources
Host: WASP-107. 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 | 10.4804 (+0.257807 / -0.257807) | Yee & Vissapragada 2026 |
| Mass · Earth masses | 33.0224 (+1.23953 / -1.3031) | Yee & Vissapragada 2026 |
| Density · g/cm³ | 0.157 (+0.012 / -0.014) | Yee & Vissapragada 2026 |
| Orbital period · days | 5.72149 (+3e-07 / -3e-07) | Yee & Vissapragada 2026 |
| Orbital semimajor axis · AU | 0.055 (+0.001 / -0.001) | Anderson et al. 2017 |
| Eccentricity | ≤ 0.052 | Yee & Vissapragada 2026 |
| Inclination · degrees | 89.57 (+0.03 / -0.03) | Murphy et al. 2024 |
| Irradiation · Earth flux | 51 (+4 / -4) | Howard et al. 2025 |
| Equilibrium temperature · K | 736 (+17 / -17) | Močnik et al. 2017 |
| Stellar effective temperature · K | 4425 (+70 / -70) | Howard et al. 2025 |
| Stellar radius · Solar | 0.657 (+0.016 / -0.016) | Močnik et al. 2017 |
| Stellar mass · Solar | 0.683 (+0.017 / -0.016) | Piaulet et al. 2021 |
| Stellar luminosity · log Solar | -0.87943 (+0.00976 / -0.00998) | Piaulet et al. 2021 |
| Stellar age · Gyr | 3.4 (+0.7 / -0.7) | Bourrier et al. 2023 |
| Stellar metallicity · dex | 0.02 (+0.09 / -0.09) | Howard et al. 2025 |
| Distance · pc | 64.7414 (+0.2617 / -0.2596) | TICv8 |
References
- NASA Exoplanet Archive · WASP-107 b · composite snapshot, 25 September 2026
- Dyrek et al. 2023 · silicate clouds and sulfur dioxide
- Yee & Vissapragada 2026
- Anderson et al. 2017
- Yee & Vissapragada 2026
- Murphy et al. 2024
- Howard et al. 2025
- Močnik et al. 2017
- Piaulet et al. 2021
- Bourrier et al. 2023
- TICv8