ExoAtmospheres
IAC community database for exoplanet atmospheric observations
WASP-107 b
| Planet status | Confirmed |
|---|---|
| Planet type | Warm Jupiter |
| Period | 5.72149 d |
| Mass | 0.12 MJ 38.136 M⊕ |
| Radius | 0.94 RJ 10.528 R⊕ |
| Semi major axis | 0.055 AU |
| Star name | WASP-107 |
| Star distance | 64.7414 pc |
| Star teff | 4430 K |
| Star radius | 0.66 R☉ |
| Temperature (calculated) | 739 K |
| V | 11.6 mag |
| J | 9.378 mag |
| K | 8.637 mag |
| Alternate names | |
| Exoplanet Encyclopaedia |  |
Molecules
Cloudy: Detection
|
JWST-MIRI | A Cloudy Fit to the Atmosphere of WASP-107 b2026, Helong Huang, Michiel Min et al. |
Even in warm planets such as WASP-107 b, silicate clouds can form in the relatively cool upper atmosphere. |
CO: Detection H2O: Detection
|
G-B: High resolution IR | VLT/CRIRES+ observations of warm Neptune WASP-107 b: Molecular detections and challenges in ground-based transmission spectroscopy of cooler and cloudy exoplanets2025, Linn Boldt-Christmas, Adam D. Rains et al. |
|
He: Detection H2O: Detection K: Upper limit
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JWST-NIRISS | Continuous helium absorption from the leading and trailing tails of WASP-107b2025, Vigneshwaran Krishnamurthy, Yann Carteret et al. |
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SO2: Detection CO2: Detection Cloudy: Detection
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JWST-NIRSpec | A Panchromatic Characterization of the Evening and Morning Atmosphere of WASP-107 b: Composition and Cloud Variations, and Insight into the Effect of Stellar Contamination2025, Matthew M. Murphy, Thomas G. Beatty et al. |
evidence for evening--morning variation in SO2 and CO2, temperature and clouds |
Cloudy: Detection
|
JWST-NIRCam | Evidence for Morning-to-Evening Limb Asymmetry on the Cool Low-Density Exoplanet WASP-107b2024, Matthew M. Murphy, Thomas G. Beatty et al. |
Found limb asymmetry in cloud properties |
H2O: Detection CO2: Detection CO: Detection CH4: Detection SO2: Detection NH3: Detection Molecular ratios: C/O, etc...: Detection
|
JWST-NIRCam | A High Internal Heat Flux and Large Core in a Warm Neptune Exoplanet2024, Luis Welbanks, Taylor J. Bell et al. |
|
He: Detection
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G-B: High resolution IR | LV: A HeI survey of close-in giant planets hosted by M-K dwarf stars with GIANO-B2024, G. Guilluy, M. C. D'Arpa et al. |
Confirmation of He detection with GIANO-B (8.17±0.80%) |
SO2: Detection CH4: No detection Cloudy: Detection H2O: Detection
|
JWST-MIRI | SO$_2$, silicate clouds, but no CH$_4$ detected in a warm Neptune2023, Achrène Dyrek, Michiel Min et al. |
|
He: Detection
|
G-B: High resolution IR | The post-transit tail of WASP-107b observed at 10830A2021, J. J. Spake, A. Oklopčić et al. |
Detection of long post-transit tail |
He: Detection
|
G-B: High resolution IR | Confirmation of WASP-107b's Extended Helium Atmosphere with Keck II/NIRSPEC2020, Kirk, James, Alam, Munazza K. et al. |
30 sigma detection of excess He absorption in WASP-107b's atmosphere using Keck/NIRSPEC |
He: Detection
|
G-B: High resolution IR | High-resolution confirmation of an extended helium atmosphere around WASP-107b2019, Allart, R., Bourrier, V. et al. |
Using CARMENES. The detection confirms previous detection done with HST/WFC3. |
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HST WFC3 | Water, High-altitude Condensates, and Possible Methane Depletion in the Atmosphere of the Warm Super-Neptune WASP-107b2018, Kreidberg, Laura, Line, Michael R. et al. |
H2O absorption detected at 6.5 sigma |
He: Detection
|
HST WFC3 | Helium in the eroding atmosphere of an exoplanet2018, Spake, J. J., Sing, D. K. et al. |
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H2O: Detection SO2: Detection H2S: Detection
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JWST-MIRI | Astro-ph arXiv:2609.05264 | Evidence for PHS (phosphine) features in the MIRI transmission spectrum |