MASCARA-1b is a confirmed superjovian exoplanet, orbiting the A-type star MASCARA-1 (HD 201585).

MASCARA-1b
Discovery
Discovered byMASCARA
Discovery date17 July 2017
Orbital characteristics
0.040352 AU
2.1 d
StarMASCARA-1
Physical characteristics
1.597 RJ
Mass3.7 MJ
Temperature3062 K

Characteristics

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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+0.066
−0.068
and dayside temperature of 3062+66
−68
K.[1] Attempts to spectroscopically characterize its composition were failing as in 2022 due to relatively high planetary surface gravity resulting in compact atmosphere.[2]

References

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  1. ^ Spi-OPS:Spitzer and CHEOPS confirm the near-polar orbit of MASCARA-1b and reveal a hint of dayside reflection, 2021, arXiv:2109.05031
  2. ^ Transmission spectroscopy of MASCARA-1b with ESPRESSO:Challenges of overlapping orbital and Doppler tracks, 2022, arXiv:2206.09443