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HD 147506

The early yellow subgiant HD 147506 is orbited every 5.63 days by the planet HAT-P-2b. This is a giant planet with 8.17 times the mass of Jupiter. Although like a typical gas planet it is made for the most part of hydrogen and helium, it has an average density like the rocky planet Earth.

Constellation: Hercules
Distance: 440 light-years
Spectral class: F8
Visual magnitude: 8.71
Luminosity: 4.25 * Sun
Mass: 1.35 * Sun
Diameter: 1.8 * Sun

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    Pi Mensae
HD 147506 is the brightest star in this picture, right from the middle.
Photo: ESO Online Digitized Sky Survey

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