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STS 61-B was the second flight of the shuttle Atlantis. On board were Brewster Shaw, Bryan O'Conner, Mary Cleave, Sherwood Spring, Jerry Ross, Rudolfo Neri Vela (Mexico), and Charles Walker. Deployed during this mission were the Morelos-B (Mexico), Aussat-2 (Australian), and SATCOM KU-2 (RCA) satellites. This mission demonstrated construction in space by manually assembling the EASE and ACCESS experiments. Experiments required two space walks by Spring and Ross lasting five hours, 32 minutes, and six hours, 38 minutes, respectively. Middeck payloads included: Continuous Flow Electrophoresis System (CFES); Diffusive Mixing of Organic Solutions (DMOS); Morelos Payload Specialist Experiments (MPSE) and Orbiter Experiments (OEX). In the payload bay were the Get Away Special and IMAX Cargo Bay Camera (ICBC). Also deployed was the Station Keeping Target (OEX) to conduct advanced station keeping tests.

The mission duration was 165 hours 4 minutes 49 seconds.

Alternate Names

  • 16273
  • STS 23
  • STS61B

Facts in Brief

Launch Date: 1985-11-27
Launch Vehicle: Shuttle
Launch Site: Cape Canaveral, United States
Mass: 21762 kg

Funding Agency

  • NASA-Office of Space Flight (United States)


  • Life Science
  • Human Crew
  • Microgravity

Additional Information

Questions and comments about this spacecraft can be directed to: Coordinated Request and User Support Office

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