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Source: Space Demographics compiled by William Harwood with days in space from
Mark Wade's Encyclopedia Astronautica, and NASA.
Notes:
- Days in space exclude ongoing missions and are rounded off.
- Because the Space Shuttle Challenger was lost before reaching orbit on
January 28, 1986, STS-51L is not counted for the veteran crew members,
and the three rookie crew members of the STS-51L mission are not included
in this list.
- 522 people have flown in orbit, following the launch of Soyuz TMA-3M. (Joseph
Engle flew three X-15 flights over 80 km in addition to two Space Shuttle
missions)
- Under the United States Air Force (USAF) definition (over 80 km altitude):
531 (Eight X-15 pilots, including Joseph Walker, flew the X-15 above 80 km
13 times. Mike Melvill and Brian Binnie flew SpaceShipOne (SS1) over 100
km three times.)
- Under the Fédération Aéronautique Internationale (FAI)
definition (over 100 km altitude): 525 (One of the X-15 pilots, Joseph Walker, flew two X-15 flights over 100
km. Mike Melvill and Brian Binnie flew SpaceShipOne over 100 km three times.)
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