Exploration Mission 2

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Exploration Mission 2
NASA Asteroid Initiative spacecraft conception.jpg
Operator NASA/ESA
Spacecraft properties
Spacecraft type Orion MPCV
Start of mission
Launch date As early as 2021
Rocket SLS Block 1[1]
Launch site Kennedy LC-39B[2]
End of mission
Landing site Pacific Ocean[3]

Orion logo.png

Beyond Low Earth Orbit Program
← EM-1 EM-3 →

Exploration Mission 2 or EM-2 is scheduled to be the first manned mission of NASA's Orion project, which is to restart manned exploration of the Solar System. It is to be launched as early as 2021 and will take a 2 person crew, for the first time, to a captured asteroid in lunar orbit.

In the event this mission does in fact go ahead it will (barring earlier flights by other Agencies in the interim) be the first time humans have left low earth orbit since Apollo 17 in December 1972.


EM-2 is a single launch mission of a Block I SLS with ICPS and lunar Block 1 Orion Multi-Purpose Crew Vehicle (MPCV) with a liftoff mass around 68.8 t with SLS’ Payload Insertion of 50.7 t, which would be a ten to fourteen day mission with a crew of four astronauts who would spend four days in lunar orbit. Its current description is “Crewed mission to enter lunar orbit, test critical mission events, and perform operations in relevant environments”. The destination for EM-2, as of 2013, is regarded to be a captured asteroid, in lunar orbit, to be conducted by no later than 2021.[4] The destination could possibly be 2000 SG344 although there are a number of other options.[5]


  1. ^ Bergin, Chris (23 February 2012). "Acronyms to Ascent – SLS managers create development milestone roadmap". NASASpaceflight.com. Retrieved 14 July 2012. 
  2. ^ Hill, Bill (March 2012). "Exploration Systems Development Status". NASA Advisory Council. Retrieved 21 July 2012. 
  3. ^ Bergin, Chris (14 June 2012). "NASA teams evaluating ISS-built Exploration Platform roadmap". NASASpaceflight.com. Retrieved 21 July 2012. 
  4. ^ "NASA managers evaluate yearlong deep space asteroid mission September 9, 2013 by Marshall Murphy". 
  5. ^ "Near-Earth Object Human Space Flight Accessible Targets Study (NHATS)". NASA/JPL Near-Earth Object Program Office. Retrieved 2012-06-08.