HD 189733

HD 189733, also known as V452 Vulpeculae, is a binary star system 64.5 light years away in the constellation of Vulpecula. The main star is believed to be an orange dwarf, while the second star is a red dwarf star. Since this system has the same visual magnitude as star HD 209458, it promises a lot for the study of extrasolar planets when they pass in front of their stars. The star can be seen with binoculars 0.3 degrees east of the Dumbbell Nebula (M27).

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As of 2005, it has been confirmed that an exoplanet, HD 189733 b, orbits the main star within the system.

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Category:Binary stars