WASP-18b
Astronomical discovery
>
.jpg&imgrefurl=https://exoplanets.nasa.gov/resources/245/wasp-18b-a-hot-jupiter/&h=428&w=540&tbnid=hoDbnSafnXXn9M&q=WASP-18b&tbnh=105&tbnw=132&usg=AI4_-kQKNrcgxzEPtTCZhfhHRuia9w7AmQ&vet=1&docid=oIKS0xdSpiWCJM&sa=X&ved=2ahUKEwil8sH_suCFAxVvZfUHHVvyCKUQ9QF6BAgAEAY)
WASP-18b is an exoplanet that is notable for having an orbital period of less than one day. It has a mass equal to 10 Jupiter masses, just below the boundary line between planets and brown dwarfs. Wikipedia
Discoverer: Michaël Gillon
Radius: 49,132 mi
Discovered: August 27, 2009
Distance to Earth: 325 light years
Apparent magnitude (V): 9.29
Argument of periastron: −85°+72°; −96°
Detection method: Transit (including secondary eclipses)