ExoAtmospheres
IAC community database for exoplanet atmospheric observations

WASP-80 b

Planet status	Confirmed
Planet type	Hot Jupiter
Period	3.0678504 d
Mass	0.554 M_J 176.0612 M⊕
Radius	0.952 R_J 10.6624 R⊕
Semi major axis	0.0346 AU
Star name	WASP-80
Star distance	60 pc
Star teff	4145 K
Star radius	0.63 R☉
Temperature (calculated)	825 K
V	11.881 mag
J	9.218 mag
K	8.351 mag
Alternate names
Exoplanet Encyclopaedia

Molecules

H2O: Detection CH4: Detection CO2: Detection NH3: Detection CO: Upper limit SO2: Upper limit	JWST-NIRCam	The Identification of CS2 and Evidence for Carbon-Sulfur Chemical Coupling in a Warm Giant Exoplanet Atmosphere 2026, Anastasia Triantafillides, Thomas G. Beatty et al.	Three transits using NIRCam + MIRI. Detection of CS2
Featureless spectra: Detection	G-B: High resolution IR	Searching for Molecular Signatures in 14 Transiting Exoplanets with SPIRou 2026, A. Masson, S. Vinatier et al.	SPIRou cross-correlation observations does not show molecular signals
Molecular ratios: C/O, etc...: Detection	JWST-NIRCam	The bulk metal content of WASP-80 b from joint interior-atmosphere retrievals: Breaking degeneracies and exploring biases with panchromatic spectra 2025, Lorena Acuña-Aguirre, Laura Kreidberg et al.
He: Upper limit	G-B: High resolution IR	HET/HPF observations of Helium in warm, hot, and ultra-hot Jupiters 2025, Jaume Orell-Miquel, Kyra Sampson et al.
Molecular ratios: C/O, etc...: Detection	JWST-NIRCam	A Precise Metallicity and Carbon-to-Oxygen Ratio for a Warm Giant Exoplanet from its Panchromatic JWST Emission Spectrum 2025, Lindsey S. Wiser, Taylor J. Bell et al.
Albedo: 0.204 Dayside Temperature (occultation): 811 K	JWST-NIRISS	A Moderate Albedo from Reflecting Aerosols on the Dayside of WASP-80 b Revealed by JWST/NIRISS Eclipse Spectroscopy 2025, Kim Morel, Louis-Philippe Coulombe et al.
Na: Upper limit	G-B: High resolution visible	The GAPS programme at TNG LXVI. A homogeneous search for Na i and its possible variability in ten gas giant exoplanets 2024, D. Sicilia, L. Malavolta et al.	No clear Na detection from several transits
He: Upper limit	G-B: High resolution IR	Probing atmospheric escape through metastable He I triplet lines in 15 exoplanets observed with SPIRou 2024, A. Masson, S. Vinatier et al.
CH4: Detection	JWST-NIRCam	Methane Throughout the Atmosphere of the Warm Exoplanet WASP-80b 2023, Taylor J. Bell, Luis Welbanks et al.
	HST WFC3	Probing reflection from aerosols with the near-infrared dayside spectrum of WASP-80b 2023, Bob Jacobs, Jean-Michel Désert et al.	Probing reflection from aerosols with the near-infrared dayside spectrum
He: Upper limit	G-B: High resolution IR	Homogeneous search for helium in the atmosphere of 11 gas giant exoplanets with SPIRou 2023, R. Allart, P. -B. Lemée-Joliecoeur et al.	3sigma upper limit of <1.24 % with SPIRou.
H2O: Detection CH4: Detection HCN: Detection NH3: Detection	G-B: High resolution IR	The GAPS Programme at TNG XXXIX -- Multiple molecular species in the atmosphere of the warm giant planet WASP-80 b unveiled at high resolution with GIANO-B 2022, Ilaria Carleo, Paolo Giacobbe et al.
H2O: Detection Rayleigh Scattering: Detection	HST WFC3	The Hubble PanCET Program: A Featureless Transmission Spectrum for WASP-29b and Evidence of Enhanced Atmospheric Metallicity on WASP-80b 2022, Ian Wong, Yayaati Chachan et al.
He: No detection	G-B:Low resolution IR	The Upper Edge of the Neptune Desert Is Stable Against Photoevaporation 2022, Shreyas Vissapragada, Heather A. Knutson et al.	Narrow band photometry with Palomar/WIRC. 95th-percentile upper limit of 0.35% excess absorption.
He: No detection	G-B: High resolution IR	The GAPS Programme at TNG. XXXII. The revealing non-detection of metastable HeI in the atmosphere of the hot Jupiter WASP-80b 2021, L. Fossati, G. Guilluy et al.
H3+: Upper limit	G-B: High resolution IR	Astro-ph arXiv:2504.15393	Non detection of H3+ emission