55 Cnc e
An artistic scene associated with 55 Cnc e. 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 55 Cnc e, a catalogued exoplanet orbiting 55 Cnc. The available catalog measurements below describe the real system; they do not establish the illustrated scenery.
McArthur et al. 2004 · Bourrier et al. 2018 · ExoFOP · Demory et al. 2011 · Knapp et al. 2020
Available measurements
Host: 55 Cnc · 2 catalog star(s) · Super-Earth / transition
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 | 1.875 [+0.029 / -0.029] | Earth radii | Bourrier et al. 2018 |
| Planet mass | 7.99 [+0.32 / -0.33] | Earth masses | Bourrier et al. 2018 |
| Bulk density | 6.66 [+0.43 / -0.4] | g/cm³ | Bourrier et al. 2018 |
| Orbital period | 0.73655 [+1.3e-06 / -1.4e-06] | days | Bourrier et al. 2018 |
| Orbital semimajor axis | 0.01544 [+5e-05 / -5e-05] | AU | Bourrier et al. 2018 |
| Orbital eccentricity | 0.05 [+0.03 / -0.03] | Bourrier et al. 2018 | |
| Orbital inclination | 83.59 [+0.47 / -0.44] | degrees | Bourrier et al. 2018 |
| Irradiation | 2,657.8 | Earth flux | ExoFOP |
| Equilibrium temperature | 1,958 [+15 / -15] | K; not surface temperature | Demory et al. 2011 |
| Catalog stellar effective temperature | 5,172 [+18 / -18] | K | Bourrier et al. 2018 |
| Catalog stellar radius | 0.943 [+0.01 / -0.01] | Solar radii | Bourrier et al. 2018 |
| Catalog stellar mass | 0.905 [+0.015 / -0.015] | Solar masses | Bourrier et al. 2018 |
| Catalog stellar luminosity | -0.19695 [+0.0125 / -0.01039] | log10 Solar luminosity | Knapp et al. 2020 |
| Catalog stellar age | 5.5 [+2.5 / -2.5] | Gyr | Marcy et al. 2002 |
| Catalog stellar metallicity | 0.35 [+0.1 / -0.1] | dex | Bourrier et al. 2018 |
| System distance | 12.585 [+0.0124 / -0.0123] | 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. No confirmed life; no planet-specific biosignature literature review in this release.
Papers and references
McArthur et al. 2004 · Bourrier et al. 2018 · ExoFOP · Demory et al. 2011 · Knapp et al. 2020 · Marcy et al. 2002 · TICv8