Atlas SLV-3D Centaur | HEAO 1
Atlas SLV-3D Centaur | HEAO 1 rode a Atlas SLV-3D Centaur into space from Cape Canaveral SFS, FL, USA, deploying its payload to LEO.
- Launch time
- Status
- SUCCESS
- Operator
- United States Air Force
- Mission type
- Astrophysics
- Rocket
- Atlas SLV-3D Centaur
- Launch site
- Cape Canaveral SFS, FL, USA
- Launch pad
- Launch Complex 36B
- Payload
- —
- Target orbit
- LEO

Mission timeline
- 1977-08-12T06:29:31.000ZLiftoff confirmed — Atlas SLV-3D Centaur is airborne.
- Max Q — Atlas SLV-3D Centaur endures peak structural stress during ascent.
- First-stage main engine cutoff (MECO) confirmed.
- The spent first stage separates from the upper stage.
- Upper stage ignites, continuing the journey toward orbit.
- The mission reaches LEO, successfully entering orbit.
- The mission concludes successfully.