WASP-31b
WASP-31b is a low-density (puffy) "hot Jupiter" extrasolar planet orbiting the metal-poor (63% of solar metallicity) dwarf star WASP-31.
[2][1] WASP-31b is in the constellation of Crater,[3] and is about 1305 light-years[4] (light travel distance) from Earth.
[2] In 2012, it was found from the Rossiter–McLaughlin effect that WASP-31b is orbiting the parent star in a prograde direction, with the WASP-31 star rotational axis inclined to the planetary orbit by 2.8±3.1 degrees.
[6] The spectroscopic study in 2014 revealed that WASP-31b has a dense cloud deck overlaid by a hazy atmosphere.
[10] Reanalysis of planetary spectroscopic data in 2020 has revealed the presence of chromium monohydride besides water.
Comparison of "
hot Jupiter
" exoplanets, including WASP-31b
(top row; 3rd from left) (artist concept)
(top row; 3rd from left) (artist concept)
From top left to lower right: WASP-12b , WASP-6b , WASP-31b, WASP-39b , HD 189733b , HAT-P-12b , WASP-17b , WASP-19b , HAT-P-1b and HD 209458b .