ExoAtmospheres
IAC community database for exoplanet atmospheric observations
LHS 1140 c
| Planet status | Confirmed |
|---|---|
| Planet type | Warm Super-Earth |
| Period | 3.777931 d |
| Mass | 0.0057 MJ 1.81146 M⊕ |
| Radius | 0.1144 RJ 1.28128 R⊕ |
| Semi major axis | 0.02675 AU |
| Star name | LHS 1140 |
| Star distance | 12.47 pc |
| Star teff | 3131 K |
| Star radius | 0.186 R☉ |
| Temperature (calculated) | 422 K |
| V | 14.15 mag |
| J | 9.612001 mag |
| K | 8.821 mag |
| Alternate names | TOI-256 c |
| Exoplanet Encyclopaedia |  |
Molecules
He: Upper limit
|
G-B: High resolution IR | Helium escaping from the atmosphere of a nearby rocky exoplanet orbiting in a habitable zone2026, Collin Cherubim, Shreyas Vissapragada et al. |
|
Dayside Temperature (occultation): 595 K |
JWST-MIRI | Reanalysis of the Eclipses of LHS 1140 c: No Evidence of an Atmosphere and Implications for the Internal Structure of the Planet2026, Rochon, Alexandra, Artigau, Étienne et al. |
|
CO2: Upper limit Dayside Temperature (occultation): 561 K |
JWST-MIRI | Hot Rocks Survey III: A deep eclipse for LHS 1140c and a new Gaussian process method to account for correlated noise in individual pixels2025, Mark Fortune, Neale P. Gibson et al. |
Dayside brightness is close to theoretical maximum and they rule out a wide range of possible atmospheres. |