Sergei Vasilyevich Avdeyev (January 1, 1956–) was a Russian cosmonaut.

Born in Chapayevsk, Kuybyshev Oblast, Russian SFSR on January 1, 1956. Married with two children. Selected as a cosmonaut as part of the Energia Engineer Group 9 - March 26, 1987. His basic cosmonaut training was from December 1987 through July 1989. He retired as a cosmonaut on February 14, 2003.

He is the cumulative record-holder for time spent in space with 747.59 days spent orbiting earth, accumulated on 3 separate stays aboard the Mir Space Station. He has orbited the earth an incredible 11,968 times traveling about 515,000,000 kilometers.

Sergei Avdeyev graduated from Moscow Physic-Engineering Institute in 1979. He is an engineer-physicist. From 1979 to 1987 he worked as an engineer for NPO Energiya. His hobbies include; nuclear physics, sports, and games. He is also an Amateur radio operator, his call sign is RV3DW.

He is the record holder for total time in space, with 747 days, 14 hours, 14 minutes and 9 seconds.

Spaceflights

• Soyuz TM-15 - July 27, 1992 to February 1, 1993 - 188 days, 21 hours, 41 minutes, 15 seconds
• Soyuz TM-22 - September 3, 1995 to February 29, 1996 - 179 days, 1 hour, 41 minutes, 45 seconds
• Soyuz TM-28 - Soyuz TM-29 - August 13, 1998 to August 28, 1999 - 379 days, 14 hours, 51 minutes, 9 seconds

Spacewalks (42 hours, 2 minutes)

• 1. MIR EO-12 - September 3, 1992 - 3 hours, 56 minutes
• 2. MIR EO-12 - September 7, 1992 - 5 hours, 8 minutes
• 3. MIR EO-12 - September 11, 1992 - 5 hours, 44 minutes
• 4. MIR EO-12 - September 15, 1992 - 3 hours, 33 minutes
• 5. MIR E0-20 - October 20, 1995 - 5 hours, 11 minutes
• 6. MIR EO-20 - December 8, 1995 - 0 hours, 37 minutes
• 7. MIR EO-26 - September 15, 1998 - 0 hours, 30 minutes
• 8. MIR EO-26 - November 17, 1998 - 5 hours, 54 minutes
• 9. MIR EO-27 - July 23, 1999 - 6 hours, 7 minutes
• 10. MIR EO-27 - July 28, 1999 - 5 hours, 22 minutes

See also

• Spaceflight records