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HD 189733, also catalogued as V452 Vulpeculae, is a binary star system approximately 63 light-years away in the constellation of Vulpecula (the Fox).
Complete catalogs require much study of binary/multiple, flare, oblate, starspot-laden stars, and astrometrically extended objects, in addition to the classically 'simple', spheroidally shaped single stars.
In the Trigun series, the planet orbits a binary star system.
DT Virginis, a binary star about which orbits a planet with the farthest orbit around such a system.
In 1855, Captain W. S. Jacob of the East India Observatory in Madras found orbital anomalies in the binary star 70 Ophiuchi that he claimed are evidence of an extrasolar planet—the first exoplanet false alarm.
XZ Tauri, a binary star system in the constellation Taurus