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|Mission type||Lunar flyby
|Launch date||15 September 1968
|Landing site||32°38′S 65°33′E|
|Mass||5,375 kilograms (11,850 lb)|
Zond 5, a formal member of the Soviet Zond program and unmanned version of Soyuz 7K-L1 manned moon-flyby spacecraft, was launched by a Proton-K carrier rocket with a Blok D upper stage to make scientific studies during a lunar flyby and to return to Earth.
Zond-5 became the first spacecraft to circle the Moon and return to land on Earth. On September 18, 1968, the spacecraft flew around the Moon. The closest distance was 1,950 km. High quality photographs of the Earth were taken at a distance of 90,000 km. A biological payload of two russian tortoises, wine flies, meal worms, plants, seeds, bacteria, and other living matter was included in the flight.
September 22, 1968, the reentry capsule entered the Earth's atmosphere but could not perform a skip re-entry due to failure of the guidance system. The capsule splashed down in the Indian Ocean and was successfully recovered by the USSR recovery vessels Borovichy and Vasiliy Golovin. The biological payload was intact, proving that it was possible to survive a lunar flyby and safely return to Earth. It was announced that the tortoises had lost about 10% of their body weight but remained active and showed no loss of appetite. The spacecraft was planned as a precursor to manned lunar spacecraft. Zond 5 return capsule is on display at the RKK Energiya museum, in Russia.
See also 
- "http://www.astronautix.com/project/lunarl1.htm". Astronautix.com. Retrieved 2012-06-21.
- The Soviet Space Race with Apollo, Asif Siddiqi, pages 655 and 656
- "Zond 5, Recovery Ship, Miss Distance", Red Moon By Michael Cassutt - page 320, Recovery Ship and Miss Distance.
- "Zond 5, Landing Point, Miss Distance", NASA Solar System Exploration - Zond 5, Landing Point, Miss Distance.
|Zond program (circumlunar)||Succeeded by
This article was originally based on material from NASA (NSSDC) information on Zond 5
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