ExoAtmospheres
IAC community database for exoplanet atmospheric observations
GJ 1214 b
| Planet status | Confirmed |
|---|---|
| Planet type | Warm Sub-Neptune |
| Period | 1.580404497 d |
| Mass | 0.0257 MJ 8.16746 M⊕ |
| Radius | 0.2446 RJ 2.73952 R⊕ |
| Semi major axis | 0.01411 AU |
| Star name | GJ 1214 |
| Star distance | 13 pc |
| Star teff | 3026 K |
| Star radius | 0.216 R☉ |
| Temperature (calculated) | 567 K |
| V | 14.71 mag |
| J | 9.75 mag |
| K | 8.782 mag |
| Alternate names | |
| Exoplanet Encyclopaedia |  |
Molecules
CO2: Upper limit
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G-B: High resolution IR | Cloudy with a chance of metals: Indications of CO$_2$ in the atmosphere of GJ 1214 b from high-resolution K-band spectroscopy2026, L. Nortmann, D. Cont et al. |
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Featureless spectra: Detection
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G-B: High resolution IR | Searching for Molecular Signatures in 14 Transiting Exoplanets with SPIRou2026, A. Masson, S. Vinatier et al. |
SPIRou cross-correlation observations does not show molecular signals |
Featureless spectra: Upper limit Molecular ratios: C/O, etc...: Upper limit
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G-B: High resolution IR | Atmospheric constraints on GJ 1214 b from CRIRES+ and prospects for characterisation with ANDES2026, A. Peláez-Torres, A. Sánchez-López et al. |
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CO2: Upper limit CH4: Upper limit
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JWST-NIRSpec | Possible Carbon Dioxide Above the Thick Aerosols of GJ 1214 b2024, Everett Schlawin, Kazumasa Ohno et al. |
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CO2: Upper limit Featureless spectra: Detection
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JWST-NIRSpec | A Possible Metal-Dominated Atmosphere Below the Thick Aerosols of GJ 1214 b Suggested by its JWST Panchromatic Transmission Spectrum2024, Kazumasa Ohno, Everett Schlawin et al. |
MIRI flat spectrum, but signal of CO2 in NIRISpec. Data can be explained with high metalicity and hazes. |
He: Upper limit
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G-B: High resolution IR | Probing atmospheric escape through metastable He I triplet lines in 15 exoplanets observed with SPIRou2024, A. Masson, S. Vinatier et al. |
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He: Upper limit
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G-B: High resolution IR | Homogeneous search for helium in the atmosphere of 11 gas giant exoplanets with SPIRou2023, R. Allart, P. -B. Lemée-Joliecoeur et al. |
3sigma upper limit of <2.92% with SPIRou. |
Featureless spectra: Detection Albedo: 0.51 Phase curve: Yes Dayside Temperature (occultation): 553 K |
JWST-MIRI | A reflective, metal-rich atmosphere for GJ 1214b from its JWST phase curve2023, Eliza M. -R. Kempton, Michael Zhang et al. |
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He: Upper limit
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G-B: High resolution IR | Non-detection of He I in the atmosphere of GJ1214b with Keck/NIRSPEC, at a time of minimal telluric contamination2022, Jessica J. Spake, Antonija Oklopčić et al. |
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He: Detection
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G-B: High resolution IR | A tentative detection of He I in the atmosphere of GJ 1214b2022, J. Orell-Miquel, F. Murgas et al. |
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He: Upper limit
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G-B:Low resolution IR | An Upper Limit on the Extended Helium Atmosphere of GJ 1214 b2020, Petit dit de la Roche, D. J. M., van den Ancker, M. E. et al. |
Upper limit = 0.38 +/- 0.44%. Using archival data from VLT/X-Shooter with a spectral resolution of R=2600. |
He: No detection
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G-B:Low resolution IR | Nondetection of Helium in the Upper Atmospheres of Three Sub-Neptune Exoplanets2020, Kasper, David, Bean, Jacob L. et al. |
Non-detection above the noise level using Keck/NIRSPEC with a resolving power of R =25000 |
He: Upper limit
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G-B:Low resolution IR | An Upper Limit on He Absorption in GJ 1214b2019, Crossfield, I. J. M., Barman, T. et al. |
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Featureless spectra: Detection
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HST WFC3 | Clouds in the atmosphere of the super-Earth exoplanet GJ1214b2014, Kreidberg, Laura, Bean, Jacob L. et al. |
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H: Upper limit
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G-B: Low resolution visible | Narrow band Hα photometry of the super-Earth GJ 1214b with GTC/OSIRIS tunable filters2012, Murgas, F., Pallé, E. et al. |
The planet radius observed at Halpha is slightly larger, but not significant |
Featureless spectra: Detection
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HST WFC3 | The Flat Transmission Spectrum of the Super-Earth GJ1214b from Wide Field Camera 3 on the Hubble Space Telescope2012, Berta, Zachory K., Charbonneau, David et al. |
Flat transmission spectra from 1.1 to 1.7 μm |
Featureless spectra: Detection
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G-B: Low resolution visible | A ground-based transmission spectrum of the super-Earth exoplanet GJ 1214b2010, Bean, Jacob L., Miller-Ricci Kempton, Eliza et al. |
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Featureless spectra: Detection
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JWST-MIRI | Astro-ph arXiv:2609.05264 | No molecule has enough evidence to explain the MIRI transmission spectrum |