Sergei Vasilyevich Avdeyev (Сергей Васильевич Авдеев; born 1 January 1956) is a former Russian

engineer Engineers, as practitioners of engineering, are professionals who Invention, invent, design, build, maintain and test machines, complex systems, structures, gadgets and materials. They aim to fulfill functional objectives and requirements while ...

and

cosmonaut An astronaut (from the Ancient Greek (), meaning 'star', and (), meaning 'sailor') is a person trained, equipped, and deployed by a List of human spaceflight programs, human spaceflight program to serve as a commander or crew member of a spa ...

. Avdeyev was born in Chapayevsk,

Samara Oblast Samara Oblast (, ) is a federal subjects of Russia, federal subject of Russia (an oblast). Its administrative center is the types of inhabited localities in Russia, city of Samara. From 1935 to 1991, it was known as Kuybyshev Oblast. As of the Rus ...

(formerly Kuybyshev Oblast),

Russian SFSR The Russian Soviet Federative Socialist Republic (Russian SFSR or RSFSR), previously known as the Russian Socialist Federative Soviet Republic and the Russian Soviet Republic, and unofficially as Soviet Russia,Declaration of Rights of the labo ...

. He graduated from

Moscow Engineering Physics Institute National Research Nuclear University MEPhI (Moscow Engineering Physics Institute) () is a public university, public technical university in Moscow, Russia. It was founded in 1942 as the Moscow Mechanical Institute of Munitions, but was soon renam ...

in 1979 as an

physicist A physicist is a scientist who specializes in the field of physics, which encompasses the interactions of matter and energy at all length and time scales in the physical universe. Physicists generally are interested in the root or ultimate cau ...

br>
From 1979 to 1987 he worked as an engineer for NPO Energiya. He was selected as a cosmonaut as part of the Energia Engineer Group 9 on 26 March 1987. His basic cosmonaut training was from December 1987 through to July 1989. He retired as a cosmonaut on 14 February 2003. Avdeyev at one point held the record for cumulative time spent in space with 747.59 days in Earth orbit, accumulated through three tours of duty aboard the

Mir ''Mir'' (, ; ) was a space station operated in low Earth orbit from 1986 to 2001, first by the Soviet Union and later by the Russia, Russian Federation. ''Mir'' was the first modular space station and was assembled in orbit from 1986 to ...

Space Station. He has orbited the Earth 11,968 times traveling about 515,000,000 kilometers. In August 2005, this record was taken by another cosmonaut, Sergei K. Krikalev; it has since been surpassed by other cosmonauts, the current record holder being

Oleg Kononenko Oleg Dmitriyevich Kononenko (; ; born 21 June 1964) is a Russian cosmonaut. He has flown to the International Space Station five times as a flight engineer for Expedition 17 aboard Soyuz TMA-12, as a flight engineer on Expedition 30 and comm ...

since February 2024. Avdeyev is married with two children. He is an

amateur radio Amateur radio, also known as ham radio, is the use of the radio frequency radio spectrum, spectrum for purposes of non-commercial exchange of messages, wireless experimentation, self-training, private recreation, radiosport, contesting, and emer ...

operator, and his

call sign In broadcasting and radio communications, a call sign (also known as a call name or call letters—and historically as a call signal—or abbreviated as a call) is a unique identifier for a transmitter station. A call sign can be formally as ...

is RV3DW.

Time dilation record

For a long time, Avdeyev held the record for

time dilation Time dilation is the difference in elapsed time as measured by two clocks, either because of a relative velocity between them (special relativity), or a difference in gravitational potential between their locations (general relativity). When unsp ...

experienced by a human being. In his 747 days aboard

, cumulative across three missions, he went approximately 27,360 km/h and thus aged roughly 0.02 seconds (20

milliseconds A millisecond (from '' milli-'' and second; symbol: ms) is a unit of time in the International System of Units equal to one thousandth (0.001 or 10−3 or 1/1000) of a second or 1000 microseconds. A millisecond is to one second, as one second i ...

) slower from an Earthbound person's perspective, p. 75 which is considerably more than any other human being, except

Sergei Krikalev Sergei Konstantinovich Krikalev (, also transliterated as Sergei Krikalyov; born 27 August 1958) is a Russian mechanical engineer and former cosmonaut and head of the Yuri Gagarin Cosmonaut Training Center. As a prominent rocket scientist, he ...

. This is due to the special relativistic effect of

and is not properly thought of as

time travel Time travel is the hypothetical activity of traveling into the past or future. Time travel is a concept in philosophy and fiction, particularly science fiction. In fiction, time travel is typically achieved through the use of a device known a ...

ling as described by mainstream culture. A common misconception is that the

Apollo program The Apollo program, also known as Project Apollo, was the United States human spaceflight program led by NASA, which Moon landing, landed the first humans on the Moon in 1969. Apollo followed Project Mercury that put the first Americans in sp ...

astronauts hold the record—they did go faster than Avdeyev, but they were only in space for a few days.

Spaceflights

Soyuz TM-15 Soyuz TM-15 was the 15th expedition to the Mir ''Mir'' (, ; ) was a space station operated in low Earth orbit from 1986 to 2001, first by the Soviet Union and later by the Russia, Russian Federation. ''Mir'' was the first modular space st ...

– 27 July 1992 to 1 February 1993 – 188 days, 21 hours, 41 minutes, 15 seconds *

Soyuz TM-22 Soyuz TM-22 was a Soyuz spaceflight to the Soviet space station Mir.The mission report is available here: http://www.spacefacts.de/mission/english/soyuz-tm22.htm It launched from Baikonur Cosmodrome Launch Pad 1 on September 3, 1995. After two d ...

– 3 September 1995 to 29 February 1996 – 179 days, 1 hour, 41 minutes, 45 seconds *

Soyuz TM-28 TM-28 was a Soyuz mission to the Mir space station. Crew Mission Accomplishments *Docked with Mir. *Baturin became the first Russian politician in space. *Padalka and Avdeyev performed an EVA on 15.09.1998 (30 m) into the module Spektr (new ...

and

Soyuz TM-29 Soyuz TM-29 was a Russian Soyuz (spacecraft), Soyuz spaceflight launched from the Baikonur Cosmodrome aboard a Soyuz 11A511U rocket. It docked with Mir on February 22, 1999 at 05:36 GMT with cosmonauts Viktor M. Afanasyev, Viktor Afanasyev of Rus ...

– 13 August 1998 to 28 August 1999 – 379 days, 14 hours, 51 minutes, 9 seconds

Spacewalks (42 hours, 2 minutes)

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

Honours and awards

Hero of the Russian Federation Hero of the Russian Federation ( rus, Герой Российской Федерации, p=ɡʲɪˈroj rɐˈsʲijskəj fʲɪdʲɪˈratsɨɪ), also unofficially called Hero of Russia ( rus, Герой России, p=ɡʲɪˈroj rɐˈsʲiɪ), is ...

(February 5, 1993) - for the successful implementation of spaceflight on the orbital scientific research complex ''Mir'' and displaying courage and heroism *

Order of Merit for the Fatherland Order, ORDER or Orders may refer to: * A socio-political or established or existing order, e.g. World order, Ancien Regime, Pax Britannica * Categorization, the process in which ideas and objects are recognized, differentiated, and understood * ...

; **2nd class (22 November 1999) - for courage and heroism displayed during prolonged space flight on the orbital scientific research complex ''Mir'' **3rd class (April 1, 1996) - for the successful implementation of spaceflight on the orbital scientific research complex ''Mir'' and displaying courage and heroism *

Medal "For Merit in Space Exploration" The Medal "For Merit in Space Exploration" () is a state decoration of the Russian Federation aimed at recognising achievements in the space program. It was established by Decree of the President of Russia, presidential decree №1099 of September ...

(April 12, 2011) - for the great achievements in the field of research, development and use of outer space, many years of diligent work, public activities * Chevalier of the

Legion of Honour The National Order of the Legion of Honour ( ), formerly the Imperial Order of the Legion of Honour (), is the highest and most prestigious French national order of merit, both military and Civil society, civil. Currently consisting of five cl ...

(France, March 1999) *

Pilot-Cosmonaut of the Russian Federation The Honorary Title Pilot-Cosmonaut of the Russian Federation () is a state award of the Russian Federation presented to all cosmonauts who fly for the Russian Federal Space Agency. Usually accompanying the distinction is the title of Hero of th ...

(February 5, 1993) * Honourary Citizen of Chapayevsk, Samara Oblast (2004)

References

{{DEFAULTSORT:Avdeyev, Sergei 1956 births Living people People from Samara Oblast Russian engineers Russian cosmonauts RKA civilian cosmonauts Moscow Engineering Physics Institute alumni Heroes of the Russian Federation Recipients of the Order "For Merit to the Fatherland", 2nd class Recipients of the Order "For Merit to the Fatherland", 3rd class Knights of the Legion of Honour Recipients of the Medal "For Merit in Space Exploration" Employees of RSC Energia European amateur radio operators Spacewalkers Mir crew members

Time dilation record

Spaceflights

Spacewalks (42 hours, 2 minutes)

Honours and awards

See also

References