Mir EO-4

Mir EO-4
Mission type	Mir expedition
Mission duration	151 days, 11 hours, 8 minutes (launch to landing)
Expedition
Space station	Mir
Began	26 November 1988
Ended	26 April 1989, 23:28:01 UTC
Arrived aboard	Soyuz TM-7; Polyakov: Soyuz TM-6
Departed aboard	Soyuz TM-7
Crew
Crew size	Three
Members	Alexander Volkov; Sergei Krikalev; Valeri Polyakov; - Transferred from EO-3
	Long-term Mir expeditions ← EO-3 EO-5 →

Mir EO-4 (also called Principal Expedition 4^[1]) was the fourth long-duration expedition to the Soviet space station Mir. The expedition began in November 1988, when crew members Commander Aleksandr Volkov and Flight Engineer Sergei Krikalev arrived at the station via the spacecraft Soyuz TM-7. The third crew member of EO-4, Valeri Polyakov, was already aboard Mir, having arrived in August 1988 part way through the previous expedition, Mir EO-3.

The expedition lasted for five months, and at its conclusion Mir was left unmanned until the launch of Mir EO-5 in September 1989. This ended a continuous habitation of the space station which began in February 1987, with the arrival of the crew of Mir EO-2.

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