ExoAtmospheres
IAC community database for exoplanet atmospheric observations
HAT-P-26 b
| Planet status | Confirmed |
|---|---|
| Planet type | Warm Neptune |
| Period | 4.234502 d |
| Mass | 0.0585 MJ 18.5913 M⊕ |
| Radius | 0.57 RJ 6.384 R⊕ |
| Semi major axis | 0.0479 AU |
| Star name | HAT-P-26 |
| Star distance | 134 pc |
| Star teff | 5079 K |
| Star radius | 0.788 R☉ |
| Temperature (calculated) | 590 K |
| V | 11.74 mag |
| J | 10.08 mag |
| K | 9.581 mag |
| Alternate names | TOI-5632.01 |
| Exoplanet Encyclopaedia |  |
Molecules
SO2: Detection CO2: Detection H2O: Detection Molecular ratios: C/O, etc...: Detection
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JWST-NIRSpec | JWST-TST DREAMS: Sulfur dioxide in the atmosphere of the Neptune-mass planet HAT-P-26 b from NIRSpec G395H transmission spectroscopy2025, Amélie Gressier, Natasha E. Batalha et al. |
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He: Upper limit
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G-B: High resolution IR | HET/HPF observations of Helium in warm, hot, and ultra-hot Jupiters2025, Jaume Orell-Miquel, Kyra Sampson et al. |
Upper limit is not consistent with previous detection using narrow-band photometry |
H2O: Detection TiO: Detection
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HST WFC3 | Revisiting the Transit Timing and Atmosphere Characterization of the Neptune-mass Planet HAT-P-26 b2023, Napaporn A-thano, Supachai Awiphan et al. |
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He: Detection
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G-B:Low resolution IR | The Upper Edge of the Neptune Desert Is Stable Against Photoevaporation2022, Shreyas Vissapragada, Heather A. Knutson et al. |
Narrow band photometry with Palomar/WIRC. 3.1σ detection, excess depth of 0.31±0.10% at mid-transit. |
Featureless spectra: Detection
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G-B: Low resolution visible | A new method to measure the spectra of transiting exoplanet atmospheres using multi-object spectroscopy2021, Vatsal Panwar, Jean-Michel Désert 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. |
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H2O: Detection Cloudy: Detection Molecular ratios: C/O, etc...: Detection
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HST STIS | Astro-ph arXiv:2503.19290 | Scattering slope weaker than Rayleigh scattering |