ExoAtmospheres
IAC community database for exoplanet atmospheric observations
HAT-P-11 b
| Planet status | Confirmed |
|---|---|
| Planet type | Warm Neptune |
| Period | 4.887802443 d |
| Mass | 0.0736 MJ 23.39008 M⊕ |
| Radius | 0.389 RJ 4.3568 R⊕ |
| Semi major axis | 0.053 AU |
| Star name | HAT-P-11 |
| Star distance | 37.89 pc |
| Star teff | 4780 K |
| Star radius | 0.683 R☉ |
| Temperature (calculated) | 750 K |
| V | 9.59 mag |
| J | 7.608 mag |
| K | 7.009 mag |
| Alternate names | |
| Exoplanet Encyclopaedia |  |
Molecules
Featureless spectra: Detection
|
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 |
He: Detection
|
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. |
|
H2O: Detection NH3: Detection CO2: Upper limit CH4: Upper limit HCN: Upper limit
|
G-B: High resolution IR | The GAPS Programme at TNG LIV. Multiple molecular species in the atmosphere of HAT-P-11 b and review of the HAT-P-11 planetary system2024, M. Basilicata, P. Giacobbe et al. |
Observations with GIANO-B. Detection of H2O and NH3, and tentative signals of CO2 and CH4 |
He: Detection
|
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 (1.36±0.17%) |
He: Detection
|
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. |
Excess absorption detection of 0.76 ± 0.07 % with SPIRou. |
H: Detection C+: Detection
|
HST STIS | Signatures of Strong Magnetization and Metal-Poor Atmosphere for a Neptune-Size Exoplanet2022, Lotfi Ben-Jaffel, Gilda E. Ballester et al. |
Ly-alpha and C+ detection |
He: Detection
|
G-B: High resolution IR | Spectrally resolved helium absorption from the extended atmosphere of a warm Neptune-mass exoplanet2018, Allart, R., Bourrier, V. et al. |
Using transit observations with CARMENES |
He: Detection
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HST WFC3 | Detection of Helium in the Atmosphere of the Exo-Neptune HAT-P-11b2018, Mansfield, Megan, Bean, Jacob L. et al. |
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H2O: Detection
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HST WFC3 | A Population Study of Gaseous Exoplanets2018, Tsiaras, A., Waldmann, I. P. et al. |