Atlas V 501 | OTV-4 (X-37B) (USA 261) (AFSPC-5) & ULTRASat cubesat deployer

Operated by United Launch Alliance, the Government/Top Secret mission Atlas V 501 | OTV-4 (X-37B) (USA 261) (AFSPC-5) & ULTRASat cubesat deployer delivered its payload into LEO.

Launch time
Status
SUCCESS
Operator
United Launch Alliance
Mission type
Government/Top Secret
Rocket
Atlas V 501
Launch site
Cape Canaveral SFS, FL, USA
Launch pad
Space Launch Complex 41
Payload
—
Target orbit
LEO
Atlas V 501 | OTV-4 (X-37B) (USA 261) (AFSPC-5) & ULTRASat cubesat deployer cover image

Mission timeline

  1. 2015-05-20T15:05:00.000Z
    Liftoff
    Atlas V 501 roars off the pad at Cape Canaveral SFS, FL, USA.
  2. Max-Q
    The vehicle reaches Max Q, the highest aerodynamic load of the flight.
  3. Main engine cutoff (MECO)
    MECO — first-stage propulsion ends after a nominal burn.
  4. Stage separation
    Clean stage separation confirmed.
  5. Second-stage ignition
    The upper-stage engine lights up after separation.
  6. Orbit insertion
    Orbit insertion confirmed — now circling in LEO.
  7. Mission success
    All mission objectives achieved.

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