Tsyklon launches in 1977
May 1977
23 May
Kosmos 910
Tsyklon
June 1977
17 Jun
Kosmos 918
Tsyklon24 Jun
Kosmos 921 (EPN 03.0380
Tsyklon
August 1977
24 Aug
Kosmos 937
Tsyklon
September 1977
16 Sep
Kosmos 952
Tsyklon18 Sep
Kosmos 954
Tsyklon24 Sep
Kosmos 956 (EPN 03.0380
Tsyklon
October 1977
26 Oct
Kosmos 961
Tsyklon
December 1977
21 Dec
Kosmos 970
Tsyklon27 Dec
Kosmos 972 (EPN 03.0380
Tsyklon