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	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 Subsequent 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 6.5 km (4.0 mi) of one another and ship-to-ship radio contact was established.^[2]

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

References

Vostok programme Unmanned: Korabl-Sputnik 1 · Vostok-1K No.1 · Korabl-Sputnik 2 · Korabl-Sputnik 3 · Vostok-1K No.4 · Korabl-Sputnik 4 · Korabl-Sputnik 5 Manned: Vostok 1 · Vostok 2 · Vostok 3 · Vostok 4 · Vostok 5 · Vostok 6 Cancelled: Vostok 7 to 13, incorporated into Voskhod programme