MASCARA-1b

{{Short description|Exoplanet in Equuleus}}

{{Infobox planet

|name=MASCARA-1b

|discovery_method=

|discovered= 17 July 2017

|discoverer= MASCARA

|semimajor= 0.040352 AU

|period= 2.1 d

|inclination=

|star= MASCARA-1

|mean_radius= 1.597 {{Jupiter radius|link=y}}

|mass= 3.7 {{Jupiter mass|link=y}}

|density =

|single_temperature=3062 K

}}

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

Characteristics

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.{{citation|arxiv=2109.05031|year=2021|title=Spi-OPS:Spitzer and CHEOPS confirm the near-polar orbit of MASCARA-1b and reveal a hint of dayside reflection}} Attempts to spectroscopically characterize its composition were failing as in 2022 due to relatively high planetary surface gravity resulting in compact atmosphere.{{citation|arxiv=2206.09443|year=2022|title=Transmission spectroscopy of MASCARA-1b with ESPRESSO:Challenges of overlapping orbital and Doppler tracks}}

References