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http://en.wikipedia.org/wiki/Vostok_4

Vostok 4 Восток-4
Mission insignia
Mission statistics
Mission name	Vostok 4 Восток-4
Spacecraft type	Vostok 3KA
Spacecraft mass	4,728 kg (10,420 lb)
Crew size	1
Call sign	Беркут (Berkut - Golden Eagle)
Booster	Vostok 8K72K
Launch pad	Gagarin's Start, Baikonur Cosmodrome[1]
Launch date	August 12 1962 08:02:33 (1962-08-12T08:02:33) UTC
Landing site	48°9′N 71°51′E / 48.15°N 71.85°E / 48.15; 71.85
Landing	August 15 1962 06:59 (1962-08-15T07:00)
Mission duration	2d/22:56
Number of orbits	48
Apogee	211 km (131 mi)
Perigee	159 km (99 mi)
Orbital period	88.2 minutes
Orbital inclination	65.0°
Related missions
Previous mission	Next mission
Vostok 3	Vostok 5

Vostok 4 (Russian: Восток-4, Orient 4 or East 4) was a mission in the Soviet space program. It was launched a day after Vostok 3 with cosmonaut Pavel Popovich on board - the first time that more than one manned spacecraft were in orbit at the same time. The two Vostok capsules came within 5 km (3.1 mi) of one another and ship-to-ship radio contact was established.

The mission went largely as planned, despite a malfunction with the Vostok's life-support systems that meant that cabin temperature dropped down to 10 °C (50 °F). The flight was terminated early after a misunderstanding by ground control, who believed that Popovich had given them a codeword asking to be brought back ahead of schedule.

The re-entry capsule is now on display at the NPO Zvezda Museum in Moscow, but it has been modified to represent the Voskhod 2 capsule.

Crew

Backup crew

Reserve crew

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Published in July 2009.

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