Astronomy and Space

HD 190655

HD 190655 (KOI-3886) is a hierarchical triple star system located about 1,500 light-years (460 parsecs) away in the northern constellation of Cygnus. It has a combined apparent magnitude of 10.114, making it readily visible using a small telescope with an aperture of 35 mm or larger, but too faint to observe via the naked eye or binoculars. The system consists of a K-type red giant (HD 190655 A) and a G-type subgiant in a wide binary, with a transiting brown dwarf orbiting the latter. The brown dwarf component is notable in that it is one of the most irradiated objects of its kind, and also the first to be discovered transiting an evolved star. Since it showed planet-like characteristics in a variety of past observations, the brown dwarf has been dubbed the "ultimate planet impostor."

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See also

• ▸Google Lunar X Prize
• ▸Eta Virginis
• ▸Docking and berthing of spacecraft

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