ExoAtmospheres
IAC community database for exoplanet atmospheric observations
TRAPPIST-1 e
| Planet status | Confirmed |
|---|---|
| Planet type | Temperate Earth-size |
| Period | 6.099615 d |
| Mass | 0.002 MJ 0.6356 M⊕ |
| Radius | 0.0819 RJ 0.91728 R⊕ |
| Semi major axis | 0.02817 AU |
| Star name | TRAPPIST-1 |
| Star distance | 12.1 pc |
| Star teff | 2560 K |
| Star radius | 0.117 R☉ |
| Temperature (calculated) | 251 K |
| V | 18.798 mag |
| J | 11.354 mag |
| K | 10.296 mag |
| Alternate names | 2MASS J23062928-0502285 e |
| Exoplanet Encyclopaedia |  |
Molecules
Featureless spectra: Detection
|
JWST-NIRSpec | JWST TRAPPIST-1 e/b Program: Motivation and first observations2025, Natalie H. Allen, Néstor Espinoza et al. |
First results from observations detrended using close transits of planet b |
Featureless spectra: Detection
|
JWST-NIRSpec | JWST-TST DREAMS: NIRSpec/PRISM Transmission Spectroscopy of the Habitable Zone Planet TRAPPIST-1 e2025, Espinoza, Néstor, Allen, Natalie H. et al. |
Flat line can explain the features in the spectrum |
H: Upper limit
|
HST STIS | Hubble's Multi-Year Search for Exospheres in the TRAPPIST-1 System Reveals Frequent Microflares2025, David Berardo, Julien de Wit et al. |
Lya is not very constrained due to the effect of microflares in the out-of-transit baseline, transit depth <20% at 5σ |
He: Theoretical prediction
|
G-B: High resolution IR | Non-detection of Helium in the upper atmospheres of TRAPPIST-1b, e and f2021, Vigneshwaran Krishnamurthy, Teruyuki Hirano et al. |