TRAPPIST-1 b
A real world. 1 imagined possibilities.
Watch this world orbit ↗Catalog central values; reported uncertainties, limits and sources are in the science record below.
Under these skies,
we imagined…
Explore this world through landscapes, life and stories. Each scene is connected to its intended planet and includes the science, the viewpoint and the details we invented.
Planetary landscapes01 imagined view
The real world, in the literature
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.
Gillon et al. 2016 · Agol et al. 2021 · Grimm et al. 2018 · Ducrot et al. 2020 · Piaulet-Ghorayeb et al. 2025 · Gaia DR2
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 | 1.116 [+0.014 / -0.012] | Earth radii | Agol et al. 2021 |
| Planet mass | 1.374 [+0.069 / -0.069] | Earth masses | Agol et al. 2021 |
| Bulk density | 5.4419 [+0.26465 / -0.27568] | g/cm³ | Agol et al. 2021 |
| Orbital period | 1.5108 [+6e-06 / -6e-06] | days | Agol et al. 2021 |
| Orbital semimajor axis | 0.01154 [+0.0001 / -0.0001] | AU | Agol et al. 2021 |
| Orbital eccentricity | 0.00622 [+0.00304 / -0.00304] | Grimm et al. 2018 | |
| Orbital inclination | 89.728 [+0.165 / -0.165] | degrees | Agol et al. 2021 |
| Irradiation | 4.153 [+0.161 / -0.159] | Earth flux | Agol et al. 2021 |
| Equilibrium temperature | 397.6 [+3.8 / -3.8] | K; not surface temperature | Ducrot et al. 2020 |
| Catalog stellar effective temperature | 2,566 [+26 / -26] | K | Agol et al. 2021 |
| Catalog stellar radius | 0.1192 [+0.0013 / -0.0013] | Solar radii | Agol et al. 2021 |
| Catalog stellar mass | 0.0898 [+0.0023 / -0.0023] | Solar masses | Agol et al. 2021 |
| Catalog stellar luminosity | -3.2573 [+0.01467 / -0.01518] | log10 Solar luminosity | Agol et al. 2021 |
| Catalog stellar age | 7.6 [+2.2 / -2.2] | Gyr | Piaulet-Ghorayeb et al. 2025 |
| Catalog stellar metallicity | 0.052 [+0.073 / -0.073] | dex | Piaulet-Ghorayeb et al. 2025 |
| System distance | 12.43 [+0.018707 / -0.018707] | pc | Gaia DR2 |