NASA Astronaut Group 20

NASA Astronaut Group 20 (The Chumps) saw the training of nine mission specialists, and five international mission specialists to become NASA astronauts. These 14 astronauts began training in August 2009 and officially graduated as astronauts on 4 November 2011.

Mission specialists

 * Serena M. Auñón (1 flight)
 * Soyuz MS-09
 * Flight engineer, Expedition 56/57
 * Jeanette J. Epps
 * SpaceX Crew-8
 * Mission specialist, Expedition 70/71
 * Jack D. Fischer (1 flight)
 * Soyuz MS-04
 * Flight engineer, Expedition 52/53
 * Michael S. Hopkins (2 flights)
 * Soyuz TMA-10M
 * Flight engineer, Expedition 37/38
 * Commander, SpaceX Crew-1
 * Flight engineer, Expedition 64/65
 * Kjell N. Lindgren (2 flights)
 * Soyuz TMA-17M
 * Flight engineer, Expedition 44/45
 * Commander, SpaceX Crew-4
 * Flight engineer, Expedition 67/68
 * Kathleen Rubins (2 flights)
 * Soyuz MS-01
 * Flight engineer, Expedition 48/49
 * Soyuz MS-17
 * Flight engineer, Expedition 63/64
 * Scott D. Tingle (1 flight)
 * Soyuz MS-07
 * Flight engineer, Expedition 54/55
 * Commander, Starliner-1 (future flight)
 * Mark T. Vande Hei (2 flights)
 * Soyuz MS-06
 * Flight engineer, Expedition 53/54
 * Soyuz MS-18/MS-19
 * Flight engineer, Expedition 64/65/66
 * Gregory R. Wiseman (1 flight)
 * Former Chief of the Astronaut Office
 * Soyuz TMA-13M
 * Flight engineer, Expedition 40/41
 * Commander, Artemis II (future flight)

International mission specialists

 * Jeremy Hansen, Canada
 * Mission specialist, Artemis II (future flight)
 * Norishige Kanai, Japan (1 flight)
 * Soyuz MS-07
 * Flight engineer, Expedition 54/55
 * Takuya Onishi, Japan (1 flight)
 * Soyuz MS-01
 * Flight engineer, Expedition 48/49
 * David Saint-Jacques, Canada (1 flight)
 * Soyuz MS-11
 * Flight engineer, Expedition 58/59
 * Kimiya Yui, Japan (1 flight)
 * Soyuz TMA-17M
 * Flight engineer, Expedition 44/45