Kosmos 37 (Russian: Космос 37 meaning Cosmos 37) or Zenit-2 No.22 was a Soviet, first generation, low resolution, optical film-return reconnaissance satellite launched in 1964. A Zenit-2 spacecraft, Kosmos 37 was the twentieth of eighty-one such satellites to be launched and had a mass of 4,730 kilograms (10,430 lb).