NSSDCA/COSPAR ID: 1977-074A
Bion 4 (Cosmos 936) involved nine countries, including the United States, in a series of biomedical research. The experiments were primarily follow-ups to the Bion 3 (Cosmos 782) flight. The mission ended after 19.5 days.
The spacecraft was based on the Zenit reconnaissance satellite and launches began in 1973 with primary emphasis on the problems of radiation effects on human beings. Launches in the program included Cosmos 110, 605, 670, 782, plus Nauka modules flown on Zenit-2M reconnaissance satellites. 90 kg of equipment could be contained in the external Nauka module.
Launch Date: 1977-08-03
Launch Vehicle: Soyuz
Launch Site: Plesetsk, U.S.S.R
Mass: 4000 kg
Questions and comments about this spacecraft can be directed to: Coordinated Request and User Support Office