[13] 31 Cygni consists of a visible pair of stars 109″ apart as of 2016, and the brighter of the two is also a spectroscopic binary.

[4][3] 31 Cygni A is an Algol-type eclipsing binary and ranges between magnitudes 3.73 and 3.89 over a period of ten years.

[7] The eclipsing system has been studied in attempts to determine an accurate direct mass for a red supergiant.

[8] 30 Cygni is another naked eye star a tenth of a degree away, forming a bright triple.

It comprises a large cool evolved star and a small hot main sequence or subgiant companion.