HD 193322
HD 193322 is a group of six stars which appear to be at least loosely bound into a system in the constellation Cygnus. The stars comprise the core of the young open cluster Collinder 419, which contains a total of 51 known stars. Another prominent member of the cluster is the eclipsing binary star . The cluster lies at a distance of about and its stars are only a few million years old.
HD 193322A
The brightest and most massive component, HD 193322A, is a triple star system and emits 89% of the system's visible light. It is composed of Aa and Ab on an eccentric 44-year orbit. The binary Ab itself consists of stars Ab1 and Ab2 on a orbit. The total mass of the system HD193233A has been calculated to be, although the individual stellar masses give a smaller total.HD 193222Aa has spectral class O9Vnn, indicating a main-sequence star with highly-broadened absorption lines due to rapid rotation. HD 193322Ab1 has spectral class O8.5III, although its derived physical properties suggest it may actually be on the main sequence. Its companion HD 193322Ab2 is a main-sequence star of spectral class B2.5. The Ab pair may have a combined mass and brightness greater than Aa.