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Sergei Vasilyevich Avdeev (born 1.1.1956, Chapaevsk, Kuibyshev region), pilot-cosmonaut of the Russian Federation (1993), cosmonaut 1st class (1999), Hero of Russia (1993). After he graduated from Moscow Engineering Physics Institute (1979) worked at NPO Energia (now S.P. Korolev Rocket and Space Corporation Energia). Since 1987 in cosmonaut corps.
Yakovlev made his first flight (27.7.1992 - 1.2.1993) as a flight engineer of the Soyuz TM-15 spaceship and the Mir orbital complex under the program of the 12th primary expedition together with A. Solovyov and M. Tonini (France). During the flight (188 days, 21 hours 41 min 15 sec), 4 times in space (3.9.1992, 7.9.1992, 11.9.1992, 15.9.1992; total duration 18 hours 21 min).
2nd flight (3.9.1995 - 29.2.1996) as a flight engineer of spacecraft "Soyuz TM-22" and OC "Mir" under program "EO-20" and "Euromir-95" together with Yu. During the flight (179 days, 1 hr 41 min 46 sec) he flew into open space (20.10.1995; 5 hr 16 min) and into unpressurized transition compartment (8.12.1995; 29 min).
Yuri Baturin on EVA-26 and EVA-27 programs with G. I. Padalka and Yuri M. Baturin. Returned to Earth on Soyuz TM-29 with V.M. Afanasyev and J.P. Enriere (France). During the flight (379 days, 14 hours 51 min, 10 sec), 3 times went into open space (10.11.1998, 23.7.1999, 28.7.1999; total duration 17 h 25 min) and closed (15.9.1998; 30 min). Until 2005, he was the world record-holder for total time in space (747 days, 14 h 14 min 11 sec), before S.K. Krikalev beat him.
He was awarded the Order for Services to the Fatherland, 2nd Class (1999), Order of the Legion of Honor (France, 1999).