HD 155876

HD 155876, also known as Gliese 661, is a nearby binary star system, consisting of two very similar red dwarfs, located in the constellation Hercules.
The star's duplicity was discovered by the Dutch astronomer Gerard Kuiper in 1934 in a systematic survey for duplicity of the known stars within about 25 parsecs from the Sun, carried out with the 36-inch telescope of the Lick Observatory. HD 155876 is the nearest "true" star system in Hercules, however, there is brown dwarf in this constellation, located closer: WISE 1741+2553.