The planet is believed to be one of the darkest ever found: so completely black that it absorbs up to 99% of the light that hits it. The only hot Jupiter that’s darker than WASP-104b is an exoplanet dubbed TrES-2b, which only reflects 0.1 percent of the light from its parent star, notes Science Alert. In fact, the exoplanet orbits its parent star — a yellow dwarf located about 466 light-years away from Earth, in the Leo constellation, Science Alert reports — from a distance of only 2.6 million miles. The authors analyzed data from NASA’s Kepler Space Telescope K2 mission, specifically the short-cadence data from Campaign 14, and found out that WASP-104b is surrounded by a thick, hazy atmosphere made up of atomic sodium and potassium. Astronomers classify a planet as a "Hot Jupiter" that are gas giant... https://t.co/k0ceVoVl1y — Rumor About (@rumorabout) April 23, 2018

“From all the dark planets I could find in the literature, this is top five-ish. Wasp-104b was first discovered in 2014 as part of the Wide Angle Search for Planets project that gives it its name. One thing we do know about hot Jupiters is that most of them are tidally locked — one side of the planet always faces its parent star, making it the permanent day side — and that they’re relatively dark, absorbing about 60 percent of the starlight that reaches them, notes Science Alert. A study has been revealed that WASP-104b, a Hot Jupiter exoplanet, has been discovered as one of the darkest exoplanets ever seen. Most hot Jupiters are dark (and extremely, extremely hot) – but this one is far, far darker than expected.
A study reveals that WASP-104b, a hot Jupiter exoplanet, is darker than charcoal and absorbs 99% of light.