Vostok 4

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Vostok 4
Vostok spacecraft.jpg
Model of the Vostok capsule with its upper stage
Operator Soviet space program
Harvard designation 1962 Alpha Nu 1
COSPAR ID 1962-037A
SATCAT no. 367
Mission duration 2 days, 22 hours, 56 minutes
Orbits completed 48
Spacecraft properties
Spacecraft Vostok-3KA No.6
Manufacturer Experimental Design Bureau OKB-1
Launch mass 4,728 kilograms (10,423 lb)
Crew size 1
Members Pavel Popovich
Callsign Беркут (Berkut - golden eagle)
Start of mission
Launch date August 12, 1962, 08:02:33 (1962-08-12UTC08:02:33Z) UTC
Rocket Vostok-K 8K72K
Launch site Baikonur 1/5[1]
End of mission
Landing date August 15, 1962, 06:59 (1962-08-15UTC07:00Z) UTC
Landing site 48°9′N 71°51′E / 48.150°N 71.850°E / 48.150; 71.850
Orbital parameters
Reference system Geocentric
Regime Low Earth
Perigee 159 kilometres (99 mi)
Apogee 211 kilometres (131 mi)
Inclination 65.0 degrees
Period 88.2 minutes
Vostok programme
Manned flights

Vostok 4 (Russian: Восток-4, Orient 4 or East 4) was a mission in the Soviet space program. It was launched in August 1962, 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 cosmonauts of Vostok 3 and 4 did not attempt rendezvous. At one point the craft came within a few kilometers of each other and Popovich later reported at a news conference that he saw the other craft from orbit. Popovich is quoted as saying, "I saw it at once," referring to seeing Vostok 3 in orbit. "It looked like a very small moon in the distance."

The Vostok 3 and 4 spacecraft landed about 200 km apart, south of Karaganda, Kazakhstan.[3]

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.


Position Cosmonaut
Pilot Pavel Popovich
First spaceflight

Backup crew[edit]

Position Cosmonaut
Pilot Vladimir M. Komarov

Reserve crew[edit]

Position Cosmonaut
Pilot Boris Volynov


  1. ^ "Baikonur LC1". Encyclopedia Astronautica. Archived from the original on 2009-04-15. Retrieved 2009-03-25. 
  2. ^ Gatland, Kenneth (1976). Manned Spacecraft, Second Revision. New York: Macmillan Publishing Co., Inc. pp. 117–118. ISBN 0-02-542820-9. 
  3. ^ "Soviet Spacemen Say No Try Made To 'Rendezvous'", TheMontreal Gazette newspaper, Aug 22, 1962