Ascent Abort-2

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Ascent Abort-2
Assembly aa2 orion.jpg
AA-2 assembly prior to launch
Mission typeInflight Abort test
Mission durationPlanned: ~3 minutes
Spacecraft properties
Spacecraft typeOrion test article
Start of mission
Launch datePlanned: 2 July 2019 (2019-07-02)
RocketOrion Abort Test Booster
Launch siteCape Canaveral Air Force Station
End of mission
Landing sitePlanned: Atlantic Ocean
Ascent Abort-2.png  

Ascent Abort-2 (AA-2) is a scheduled test of the Launch Abort System (LAS) of NASA's Orion spacecraft.

The test follows Orion's Pad Abort 1 test in 2010, and Exploration Flight Test-1 in 2014 in which the capsule first flew in space. It precedes an uncrewed flight of Orion around the Moon as the Artemis 1 mission, scheduled for June 2020, and paves the way for human use of Orion in subsequent missions of the Artemis program.

While the first test was at one point planned for 2009, in early 2013 a decision was made to postpone abort testing.[citation needed] As of February 2019 the test was scheduled for 12 June 2019,[1] but in April this was delayed to 2 July.[2]


An test article will be launched from Cape Canaveral SLC-46 by the purpose-built Orion Abort Test Booster (ATB). Its goal will be to demonstrate and qualify the Orion Launch Abort System (LAS) that will allow the astronaut crew to safely escape in the event of an emergency during launch pad operations, through the ascent phase of the Orion vehicle. The LAS will activate after 55 seconds of ascent at an altitude of 31,000 feet (9,400 m), at the point of maximum dynamic pressure, while the booster is still firing.[3] The purpose of the test is to collect data on the separation environment.


  1. ^ Malik, Tariq (21 February 2019). "NASA Sets Launch Date for Orion Spacecraft Abort System Test". Retrieved 20 May 2019.
  2. ^
  3. ^ "Ascent Abort-2 Flight Test" (PDF). NASA. 17 May 2019. Retrieved 20 May 2019.

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