ExoAtmospheres
IAC community database for exoplanet atmospheric observations
MASCARA-1 b
| Planet status | Confirmed |
|---|---|
| Planet type | UltraHot Jupiter |
| Period | 2.14878 d |
| Mass | 3.7 MJ 1175.86 M⊕ |
| Radius | 1.5 RJ 16.8 R⊕ |
| Semi major axis | 0.043 AU |
| Star name | MASCARA-1 |
| Star distance | 188.7 pc |
| Star teff | 7554 K |
| Star radius | 2.1 R☉ |
| Temperature (calculated) | 2594 K |
| V | 8.3 mag |
| J | 7.819 mag |
| K | 7.74 mag |
| Alternate names | HD 201585 b |
| Exoplanet Encyclopaedia |  |
Molecules
CO: Detection H2O: Upper limit OH: Upper limit
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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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CO: Detection H2O: Detection Fe: Detection OH: Detection Mg: Detection Ca: Detection Ti: Detection
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G-B: High resolution IR | The Roasting Marshmallows Program with IGRINS on Gemini South V: Atmosphere of MASCARA-1b is Enriched in Refractory Elements2026, Krishna Kanumalla, Michael R. Line et al. |
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CO: Detection H2O: Detection Fe: Detection Molecular ratios: C/O, etc...: Detection CO2: Upper limit Mg: Upper limit OH: Upper limit HCN: Upper limit Si: Upper limit Ca: Upper limit
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G-B: High resolution IR | New perspectives on MASCARA-1b: A combined analysis of pre- and post-eclipse emission data using CRIRES+2025, Swaetha Ramkumar, Neale P. Gibson et al. |
Atmospheric retrieval from eclipse observation |
Albedo: 0.32 Phase curve: Yes Dayside Temperature (occultation): 3000 K |
Spitzer | A Comprehensive Analysis Spitzer 4.5 $μ$m Phase Curve of Hot Jupiters2024, Lisa Dang, Taylor J. Bell et al. |
Dayside and nightside temperatures from phase curve at 4.5 um. |
Fe: Detection Ti: Detection
|
G-B: High resolution IR | Detection of Fe and Ti on the dayside of the ultrahot Jupiter MASCARA-1b with CARMENES2024, B. Guo, F. Yan et al. |
CARMENES emission observations |
Molecular ratios: C/O, etc...: Detection Fe: Detection H2O: Detection CO: Detection
|
G-B: High resolution IR | High-resolution emission spectroscopy retrievals of MASCARA-1b with CRIRES+: Strong detections of CO, H$_2$O and Fe emission lines and a C$/$O consistent with solar2023, Swaetha Ramkumar, Neale P. Gibson et al. |
Observations with CRIRES+ |
Fe: Detection Cr: Detection Ti: Detection
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G-B: High resolution visible | The PEPSI Exoplanet Transit Survey. III: The detection of FeI, CrI and TiI in the atmosphere of MASCARA-1 b through high-resolution emission spectroscopy2023, G. Scandariato, F. Borsa et al. |
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H2O: Detection CO: Detection
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G-B: High resolution IR | A First Look at CRIRES+: Performance Assessment and Exoplanet Spectroscopy2022, Måns HolmbergNikku Madhusudhan |
|
Featureless spectra: Detection
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G-B: High resolution visible | Transmission spectroscopy of MASCARA-1b with ESPRESSO: Challenges of overlapping orbital and Doppler tracks2022, N. Casasayas-Barris, F. Borsa et al. |
Study of the CLV and RM effects on retrieving featureless spectra |
H: Upper limit Fe: Upper limit Fe+: Upper limit H2O: Upper limit Featureless spectra: Upper limit
|
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-189b2022, Stangret, M., Casasayas-Barris, N. et al. |
No evidence of Hα absorption. Several non detections in cross-correlation |