ExoAtmospheres
IAC community database for exoplanet atmospheric observations

WASP-19 b

Planet status	Confirmed
Planet type	UltraHot Jupiter
Period	0.78884 d
Mass	1.139 M_J 361.9742 M⊕
Radius	1.41 R_J 15.792 R⊕
Semi major axis	0.016634 AU
Star name	WASP-19
Star distance	268.325 pc
Star teff	5500 K
Star radius	1.004 R☉
Temperature (calculated)	2077 K
V	12.3 mag
J	10.911 mag
K	10.481 mag
Alternate names
Exoplanet Encyclopaedia

Molecules

Na: Detection K: Detection H2O: Detection	G-B: Low resolution visible	Long-term monitoring of WASP-19 b: Signs of apsidal precession and molecular signatures 2026, A. R. Rajkumar, A. Bayo et al.
Molecular ratios: C/O, etc...: Detection	HST WFC3	Re-analysis of 10 Hot-Jupiter Atmospheres with disequilibrium chemistry retrieval 2025, Deborah Bardet, Quentin Changeat et al.
H2O: Detection Dayside Temperature (occultation): 2494 K	HST WFC3	A Global Perspective with Updated Constraints on the Ultra-hot Jupiter WASP-19b: Atmospheric Properties and Stellar Activity 2024, Abigail A. Tumborang, Jessica J. Spake et al.	Transmission and emission HST data combined with Spitzer photometry.
Albedo: 0.38 Phase curve: Yes Dayside Temperature (occultation): 2300 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.
Phase curve: Yes	TESS	TESS Unveils the Full Phase Curve of WASP-19b 2023, Mohammad EftekharPouyan Adibi
Featureless spectra: Detection TiO: Upper limit	G-B: Low resolution visible	A new method to correct for host star variability in multi-epoch observations of exoplanet transmission spectra 2022, Vatsal Panwar, Jean-Michel Désert et al.	Detection of stellar activity effects in the transmission spectrum
H2O: 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.
TiO: Detection	G-B: High resolution visible	A Spectral Survey of WASP-19b with ESPRESSO 2021, Elyar Sedaghati, Ryan J. MacDonald et al.	ESPRESSO TiO @ 3.0 sigma confidence. Matches low-resolution TiO from VLT FORS2. Upgrade TiO from red to orange flag.
TiO: Detection Fe: Upper limit Na: Upper limit Mg: Upper limit Ca: Upper limit H: Upper limit K: Upper limit	G-B: High resolution visible	A Spectral Survey of WASP-19b with ESPRESSO 2021, Elyar Sedaghati, Ryan J. MacDonald et al.	The TiO detection is at the 3 sigma level.
Phase curve: Yes	TESS	Systematic Phase Curve Study of Known Transiting Systems from Year One of the TESS Mission 2020, Wong, Ian, Shporer, Avi et al.	Secondary eclipse (470+/-120 ppm) and planetary brightness modulation measured.
TiO: No detection Rayleigh Scattering: No detection	G-B: Low resolution visible	ACCESS: A featureless optical transmission spectrum for WASP-19b from Magellan/IMACS 2018, Néstor Espinoza, Benjamin V. \ Rackham et al.
TiO: Detection	G-B: High resolution visible	Detection of titanium oxide in the atmosphere of a hot Jupiter 2017, Sedaghati, Elyar, Boffin, Henri M. J. et al.	First TiO detection
Albedo: 0.38 Phase curve: Yes	Spitzer	3.6 and 4.5 μm Spitzer Phase Curves of the Highly Irradiated Hot Jupiters WASP-19b and HAT-P-7b 2016, Wong, Ian, Knutson, Heather A. et al.
H2O: Detection	HST STIS	A continuum from clear to cloudy hot-Jupiter exoplanets without primordial water depletion 2015, David K. Sing, Jonathan J. Fortney et al.
Dayside Temperature (occultation): 2544 K	G-B: Low resolution visible	Physical properties, transmission and emission spectra of the WASP-19 planetary system from multi-colour photometry 2013, Mancini, L., Ciceri, S. et al.
H2O: Detection TiO: No detection	HST STIS	An HST Optical to Near-IR Transmission Spectrum of the Hot Jupiter WASP-19b: Detection of Atmospheric Water and Likely Absence of TiO 2013, C. M. Huitson, D. K. Sing et al.