| MASCARA-1b | |
| Discovered: | 17 July 2017 |
| Discoverer: | MASCARA |
| Semimajor: | 0.040352 AU |
| Period: | 2.1 d |
| Star: | MASCARA-1 |
| Mean Radius: | 1.597 |
| Mass: | 3.7 |
MASCARA-1b is a confirmed superjovian exoplanet, orbiting the A-type star MASCARA-1 (HD 201585).
MASCARA-1b is a hot Jupiter transiting its parent A-type star; its orbit is misaligned with the star's rotation. The planet was found unusually reflective for hot Jupiter with the measured geometric albedo of 0.171 and dayside temperature of 3062 K. Attempts to spectroscopically characterize its composition were failing as in 2022 due to relatively high planetary surface gravity resulting in compact atmosphere.