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HD 149026

Around this yellow star every 2.87 days in a distance of 0.046 AU orbits a Saturn sized planet. This performs a transit , has 36 % of the mass of Jupiter and 72 % of its diameter. More than half of its mass, around 70 times the Earth, accounts for its solid core. Something like this is known from no other planet.
With 2300 kelvin it is one of the hottest known exoplanets and the blackest. Which means it reflects almost no light.

Constellation: Hercules
Age: 2 billion years
Distance: 257 light-years
Spectral class: G0
Visual magnitude: 8.15
Mass: 1.3 * Sun
Diameter: 1.5 * Sun

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Changed 10/18/2008

     HD 149026
Graphic Copyright Lynette Cook
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