 |
| A Vostok 3 launch cover postmarked with two red Kiev special hand cancels dated August 11, 1962. Also postmarked with a regular Kiev hand cancel on August 11, 1962. |
Vostok 3 was the third crewed mission of the Soviet Vostok program and a significant milestone in the development of multi-spacecraft operations. Launched from Baikonur Cosmodrome on August 11, 1962, it carried cosmonaut Andrian Nikolayev.
The following day, Pavel Popovich launched aboard Vostok 4, marking the first time two crewed spacecraft were simultaneously in orbit. The mission aimed to study the effects of several days of weightlessness on the human body and to test the Vostok spacecraft’s ability to support extended-duration flight. Nikolayev spent nearly four days in orbit, completing 64 orbits of Earth — more than doubling the duration of the previous Vostok 2 mission.
 |
| A Vostok 3 launch cover from "Kiev Society of Collectors", postmarked with a red Kiev special hand cancel dated August 11, 1962. |
A major achievement of Vostok 3 was its coordinated flight with Vostok 4, launched approximately 24 hours later with Pavel Popovich aboard. The two spacecraft were placed into carefully planned orbits that brought them within approximately 6.5 km (4 miles) of each other. The cosmonauts established radio communication between the spacecraft, marking the first ship-to-ship communication between crewed spacecraft in orbit. Nikolayev reported seeing Vostok 4, while Popovich later recalled seeing Vostok 3.
 |
| A Vostok 3 launch cover postmarked in Baku with a hand cancel on August 11, 1962. |
Nikolayev carried out medical and biological observations designed to study the effects of prolonged weightlessness. He also demonstrated that a cosmonaut could release himself from his seat and float freely inside the Vostok cabin, rather than remaining strapped into the couch throughout the mission.
 |
| A Vostok 3 launch cover postmarked in Penza with a hand cancel on August 11, 1962. |
Vostok 3 completed its mission on August 15, 1962. Nikolayev reentered the atmosphere and, following the standard Vostok procedure, ejected from the descent module and landed separately by parachute. Popovich returned in Vostok 4 only minutes later.
 |
| A postcard featuring a portrait of Andrian Nikolayev, postmarked with a red Moscow special hand cancel dated August 15, 1961. |
