![]() "
Hot Jupiter"
exoplanet WASP-31b (artist concept) | |
Discovery | |
---|---|
Discovered by | Anderson, D.R. et al. [1] |
Discovery site | WASP [2] |
Discovery date | 2010 [2] |
Primary transit [2] | |
Orbital characteristics | |
0.04657±0.00034 AU | |
Eccentricity | 0 [2] |
3.40591 [2] d | |
Inclination | 84.54±0.027 [2] |
Star | WASP-31 [2] |
Physical characteristics | |
1.537±0.06 [2] RJ | |
Mass | 0.478±0.03 [2] MJ |
WASP-31b is a low-density (puffy) " hot Jupiter" extrasolar planet orbiting the metal-poor (63% of solar metallicity) dwarf star WASP-31. [1] The exoplanet was discovered in 2010 by the WASP project. [2] [1] WASP-31b is in the constellation of Crater, [3] and is about 1305 light-years [4] ( light travel distance) from Earth. [2]
WASP-31b is a low-density (puffy) " hot Jupiter" exoplanet with a mass about 0.48 times that of Jupiter and a radius about 1.55 times that of Jupiter. [2] [1] The planetary atmosphere has indeed the largest scale height, equal to 1150km, among exoplanets with measurable atmospheres as at 2021. [5]
The exoplanet orbits WASP-31, its host star, every 3.4 days. [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. [7] WASP-31b was also reported to have significant amounts of potassium in its upper atmosphere, but the detection of potassium was refuted in 2015. [8] The potassium detection discrepancy was resolved in 2020 with the improved cloud deck model, [9] with the best fit being a very small amount of water over clouds and no potassium at all. [10]
Reanalysis of planetary spectroscopic data in 2020 has revealed the presence of chromium monohydride besides water. [11]
Media related to
WASP-31b at Wikimedia Commons
![]() "
Hot Jupiter"
exoplanet WASP-31b (artist concept) | |
Discovery | |
---|---|
Discovered by | Anderson, D.R. et al. [1] |
Discovery site | WASP [2] |
Discovery date | 2010 [2] |
Primary transit [2] | |
Orbital characteristics | |
0.04657±0.00034 AU | |
Eccentricity | 0 [2] |
3.40591 [2] d | |
Inclination | 84.54±0.027 [2] |
Star | WASP-31 [2] |
Physical characteristics | |
1.537±0.06 [2] RJ | |
Mass | 0.478±0.03 [2] MJ |
WASP-31b is a low-density (puffy) " hot Jupiter" extrasolar planet orbiting the metal-poor (63% of solar metallicity) dwarf star WASP-31. [1] The exoplanet was discovered in 2010 by the WASP project. [2] [1] WASP-31b is in the constellation of Crater, [3] and is about 1305 light-years [4] ( light travel distance) from Earth. [2]
WASP-31b is a low-density (puffy) " hot Jupiter" exoplanet with a mass about 0.48 times that of Jupiter and a radius about 1.55 times that of Jupiter. [2] [1] The planetary atmosphere has indeed the largest scale height, equal to 1150km, among exoplanets with measurable atmospheres as at 2021. [5]
The exoplanet orbits WASP-31, its host star, every 3.4 days. [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. [7] WASP-31b was also reported to have significant amounts of potassium in its upper atmosphere, but the detection of potassium was refuted in 2015. [8] The potassium detection discrepancy was resolved in 2020 with the improved cloud deck model, [9] with the best fit being a very small amount of water over clouds and no potassium at all. [10]
Reanalysis of planetary spectroscopic data in 2020 has revealed the presence of chromium monohydride besides water. [11]
Media related to
WASP-31b at Wikimedia Commons