Cosmonauts:
    Aleksey A. Gubarev [1], Commander
    Georgi M. Grechko [1], Flight Engineer
Backup:
    Vasili Lazarev
    Oleg Makarov
Launch:
    Date: 10 January 1975
    Time: 21:43 UTC
Landing:
    Date: 9 February 1975
    Time: 11:03 UTC
Duration: 29 days, 13 hours, 20 minutes
Call Sign: Zenit (Zenith)

The cosmonauts worked in the Salyut 4 space station.