|Harvard designation||1962 Alpha Iota 1|
|Launch mass||4,610 kilograms (10,160 lb)|
|Start of mission|
|Launch date||28 July 1962, 09:18:31UTC|
|Launch site||Baikonur 1/5|
|End of mission|
|Landing date||1 August 1962|
|Perigee altitude||197 kilometres (122 mi)|
|Apogee altitude||356 kilometres (221 mi)|
Kosmos 7 (Russian: Космос 7 meaning Cosmos 7), also known as Zenit-2 #4 and occasionally in the West as Sputnik 17 was a Soviet reconnaissance satellite launched in 1962. It was the seventh satellite to be designated under the Kosmos system, and the second successful launch of a Soviet reconnaissance satellite. It also marked the first successful launch of a Vostok-2, on the second attempt. The first Vostok-2 launch, also carrying a Zenit-2 satellite, suffered an engine failure seconds after launch, fell back to earth and exploded within 300 metres of the launch pad.
Kosmos 7 was placed into a low Earth orbit with a perigee of 197 kilometres (122 mi), an apogee of 356 kilometres (221 mi), 64.9 degrees of inclination, and an orbital period of 90 minutes. It conducted a four-day mission, before being deorbited and landing by parachute on 1 August.
Kosmos 7 was a Zenit-2 satellite, a reconnaissance satellite derived from the Vostok spacecraft used for manned flights. It was the second Zenit-2 to reach orbit, the first being Kosmos 4. The next Zenit-2 launch was Kosmos 9. Kosmos 7 carried an area survey reconnaissance payload. In addition to reconnaissance, it was also used for research into radiation.
- Wade, Mark. "Zenit-2". Encyclopedia Astronautica. Archived from the original on 2012-04-21. Retrieved 2009-05-23.
- McDowell, Jonathan. "Launch Log". Jonathan's Space Page. Retrieved 2009-05-23.
- Wade, Mark. "Soyuz". Encyclopedia Astronautica. Archived from the original on 2010-01-17. Retrieved 2009-05-23.
- McDowell, Jonathan. "Satellite Catalog". Jonathan's Space Page. Retrieved 2009-05-23.
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