ExoAtmospheres
IAC community database for exoplanet atmospheric observations

WASP-103 b

Planet status	Confirmed
Planet type	UltraHot Jupiter
Period	0.925542 d
Mass	1.49 M_J 473.522 M⊕
Radius	1.528 R_J 17.1136 R⊕
Semi major axis	0.01985 AU
Star name	WASP-103
Star distance	470 pc
Star teff	6110 K
Star radius	1.436 R☉
Temperature (calculated)	2508 K
V	12 mag
J	11.1 mag
K	10.767 mag
Alternate names
Exoplanet Encyclopaedia

Molecules

He: Upper limit	G-B:Low resolution IR	The First Dedicated Survey of Atmospheric Escape from Planets Orbiting F Stars 2025, Morgan Saidel, Shreyas Vissapragada et al.	Non-detection using narrow-band photometric observations
Albedo: 0.25 Phase curve: Yes Dayside Temperature (occultation): 2970 K	Spitzer	A Comprehensive Analysis Spitzer 4.5 $μ$m Phase Curve of Hot Jupiters 2024, Lisa Dang, Taylor J. Bell et al.	Dayside and nightside temperatures from phase curve at 4.5 um.
Na: Upper limit H: Upper limit	G-B: High resolution visible	Stellar obliquity measurements of six gas giants 2024, J. Zak, A. Bocchieri et al.	Featureless spectra around the Na doublet and Halpha
Molecular ratios: C/O, etc...: Detection	G-B:Low resolution IR	Thermal Emission from the Hot Jupiter WASP-103b in $J$ and $K_{\rm s}$ Bands 2023, Yaqing Shi, Wei Wang et al.
Albedo: 0.13	G-B: Low resolution visible	Geometric albedos at short optical wavelengths for the hot Jupiters WASP-43b, WASP-103b, and TrES-3b 2022, Matthias Mallonn, Enrique Herrero et al.	geometric albedo in Johnson B and Johnson V, respectively: 0.13 ± 0.09 and 0.00 ± 0.12
VO: Detection TiO: Detection	HST WFC3	Five key exoplanet questions answered via the analysis of 25 hot Jupiter atmospheres in eclipse 2022, Quentin Changeat, Billy Edwards et al.
H-: Detection H2O: Detection FeH: Detection CO: Upper limit CH4: Upper limit Phase curve: Yes	HST-Other	On spectroscopic phase-curve retrievals: H2 dissociation and thermal inversion in the atmosphere of the ultra-hot Jupiter WASP-103 b 2021, Q	HST+Spitzer data
Na: Upper limit TiO: Upper limit H2O: Upper limit HCN: Upper limit	G-B: Low resolution visible	ACCESS & LRG-BEASTS: a precise new optical transmission spectrum of the ultrahot Jupiter WASP-103b 2021, James Kirk, Ben Rackham et al.	V. high precision opt. trans. spec. Unocculted faculae (4.3sig), Na (2.8sig), TiO (2.1sig), H2O (1.9sig), HCN (1.7 sig).
H2O: Detection	HST WFC3	Ground-based transmission spectroscopy with FORS2: A featureless optical transmission spectrum and detection of H<SUB>2</SUB>O for the ultra-hot Jupiter WASP-103b 2020, Wilson, Jamie, Gibson, Neale P. et al.	H2O absorption detected at 4 sigma
Phase curve: Yes	HST WFC3	Global Climate and Atmospheric Composition of the Ultra-hot Jupiter WASP-103b from HST and Spitzer Phase Curve Observations 2018, Kreidberg, Laura, Line, Michael R. et al.
Phase curve: Yes	Spitzer	Global Climate and Atmospheric Composition of the Ultra-hot Jupiter WASP-103b from HST and Spitzer Phase Curve Observations 2018, Kreidberg, Laura, Line, Michael R. et al.	Spitzer Channel 1 and Channel 2 phase curves
	G-B: Low resolution visible	Contamination from a nearby star cannot explain the anomalous transmission spectrum of the ultrashort period giant planet WASP-103 b 2016, Southworth, JohnEvans, Daniel F.	Planet radius in g, r, i, z filters corrected for the presence of a faint nearby star.
	G-B: Low resolution visible	High-precision photometry by telescope defocusing - VII. The ultrashort period planet WASP-103 2015, Southworth, John, Mancini, L. et al.	Planet radius measured in the g, r, i and z filters. Increasing radius at bluer wavelengths found.