the dual nature of this system was recognized by annie cannon in 1912, and she assigned the pair separate henry draper catalogue identifiers. they orbit each other with a period of around . the primary component is itself a spectroscopic binary in a near circular orbit with a period of around . the "a" sin "i" value for the primary is , where "a" is the semimajor axis and "i" is the orbital inclination. it has been repeatedly resolved by speckle interferometery since 1973. radio emission was detected from this system in 1985/86.