ExoAtmospheres
IAC community database for exoplanet atmospheric observations
WASP-189 b
| Planet status | Confirmed |
|---|---|
| Planet type | UltraHot Jupiter |
| Period | 2.724033 d |
| Mass | 1.99 MJ 632.422 M⊕ |
| Radius | 1.619 RJ 18.1328 R⊕ |
| Semi major axis | 0.05053 AU |
| Star name | WASP-189 |
| Star distance | 99 pc |
| Star teff | 7996 K |
| Star radius | 2.33 R☉ |
| Temperature (calculated) | 3353 K |
| V | 6.6 mag |
| J | 6.166 mag |
| K | 6.06 mag |
| Alternate names | |
| Exoplanet Encyclopaedia |  |
Molecules
CO: Detection OH: Upper limit H2O: Upper limit
|
G-B: High resolution IR | Atmospheric characterization of six ultra-hot Jupiters from $K$-band high-resolution spectroscopy2026, Luke Finnerty, Michael P. Fitzgerald et al. |
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FeH: Upper limit CO2: Upper limit CH4: Upper limit HCN: Upper limit TiO: Upper limit VO: Upper limit OH: No detection H2O: Detection CO: Detection
|
G-B: High resolution IR | Cross-correlation transmission spectroscopy of ultra-hot Jupiters WASP-189b, HAT-P-57b, KELT-17b, and KELT-21b with GIANO-B2026, P. Meni-Gallardo, J. Orell-Miquel et al. |
CO with 4.1 sigma and H2O with 4.3 sigma |
Fe: Detection Ti: Detection
|
G-B: High resolution visible | The breaking of cold traps and onset of titanium in ultra-hot Jupiter atmospheres: WASP-189b in context2026, Stefan Pelletier, Romain Allart et al. |
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Fe: Detection Si: Detection Mg: Detection H2O: Detection OH: Detection CO: Detection Molecular ratios: C/O, etc...: Detection
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G-B: High resolution visible | A Stellar Magnesium to Silicon ratio in the atmosphere of an exoplanet2025, Jorge A. Sanchez, Peter C. B. Smith et al. |
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Ca+: Detection
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G-B: High resolution visible | Untapped: Veloce Detects Calcium in the Atmosphere of WASP-189b2025, Nicholas W. Borsato, Joachim Krüger et al. |
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Fe: Detection Si: Upper limit Mg: Upper limit
|
G-B: High resolution IR | First Results from WINERED: Detection of Emission Lines from Neutral Iron and a Combined Set of Trace Species on the Dayside of WASP-189 b2025, Lennart van Sluijs, Emily Rauscher et al. |
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He: Upper limit H: Upper limit Fe: Detection
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G-B: High resolution IR | Hydride ion continuum hides absorption signatures in the NIRPS near-infrared transmission spectrum of the ultra-hot gas giant WASP-189b2025, Valentina Vaulato, Stefan Pelletier et al. |
Non-detection of several species inspected by cross-correlation |
CO: Detection Fe: Detection Molecular ratios: C/O, etc...: Detection
|
G-B: High resolution IR | Retrieving wind properties from the ultra-hot dayside of WASP-189b with CRIRES$^+$2024, F. Lesjak, L. Nortmann et al. |
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Fe: Detection
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G-B: High resolution visible | High-Resolution Dayside Spectroscopy of WASP-189b: Detection of Iron during the GHOST/Gemini South System Verification Run2024, Emily K. Deibert, Adam B. Langeveld et al. |
|
He: Upper limit
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G-B: High resolution IR | The MOPYS project: A survey of 70 planets in search of extended He I and H atmospheres. No evidence of enhanced evaporation in young planets2024, J. Orell-Miquel, F. Murgas et al. |
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Ca+: Detection Ba+: Detection Na: Detection H: Detection Mg: Detection Fe: Detection
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G-B: High resolution visible | An atlas of resolved spectral features in the transmission spectrum of WASP-189 b with MAROON-X2024, B. Prinoth, H. J. Hoeijmakers et al. |
|
Mg+: Detection
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HST STIS | CUTE reveals escaping metals in the upper atmosphere of the ultra-hot Jupiter WASP-189b2023, A. G. Sreejith, Kevin France et al. |
Observed with CUTE, not HST. We observe a quasi-continuous absorption signal consistent with a "forest" of low-ionization metal absorption dominated |
H: Detection Na: Detection Mg: Detection Ca: Detection Ca+: Detection Ti: Detection Ti+: Detection TiO: Detection V: Detection Cr: Detection Mn: Detection Fe: Detection Fe+: Detection Ni: Detection Sr: Detection Sr+: Detection Ba+: Detection
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G-B: High resolution visible | Time-resolved transmission spectroscopy of the ultra-hot Jupiter WASP-189 b2023, Bibiana Prinoth, H. Jens Hoeijmakers et al. |
H, Na, Mg, Ca, Ca+, Ti, Ti+, TiO, V, Cr, Mn, Fe, Fe+, Ni, Sr, Sr+, and Ba+. Of these, Sr, Sr+, and Ba+ |
Fe: Detection Mg: Detection Ni: Detection Cr: Detection Mn: Detection V: Detection Ca: Detection Ti: Detection Na: Upper limit
|
G-B: High resolution visible | Retrieval Survey of Metals in Six Ultrahot Jupiters: Trends in Chemistry, Rain-out, Ionization, and Atmospheric Dynamics2023, Gandhi, Siddharth, Kesseli, Aurora et al. |
|
CO: Detection
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G-B: High resolution IR | Detection of CO emission lines in the dayside atmospheres of WASP-33b and WASP-189b with GIANO2022, F. Yan, E. Pallé et al. |
Co detected in emission |
Albedo: 0.48 Phase curve: Yes |
CHEOPS | The atmosphere and architecture of WASP-189 b probed by its CHEOPS phase curve2022, A. Deline, M. J. Hooton et al. |
Albedo is an upper limit |
TiO: Detection Fe: Detection Fe+: Detection Ti: Detection Ti+: Detection Cr: Detection Mg: Detection V: Detection Mn: Detection
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G-B: High resolution visible | Titanium oxide and chemical inhomogeneity in the atmosphere of the exoplanet WASP-189b2021, Bibiana Prinoth, H. Jens Hoeijmakers et al. |
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Fe: Detection Fe+: Detection Ti: Detection H: Upper limit Ca: Upper limit
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G-B: High resolution visible | High-resolution transmission spectroscopy study of ultra-hot Jupiters HAT-P-57b, KELT-17b, KELT-21b, KELT-7b, MASCARA-1b, and WASP-189b2021, Stangret, M., Casasayas-Barris, N. et al. |
Detection of Fe, Fe+, Ti and tentative detection of Halpha, Hbetha, Ca (H&K) using HARPS-N transit observations |
Fe: Detection
|
G-B: High resolution visible | A temperature inversion with atomic iron in the ultra-hot dayside atmosphere of WASP-189b2020, Yan, F., Pallé, E. et al. |