Thor Delta E | ESSA 4

United States Air Force flew Thor Delta E | ESSA 4 on a Thor Delta E out of Vandenberg SFB, CA, USA, placing its payload in SSO.

Launch time
Status
SUCCESS
Operator
United States Air Force
Mission type
Earth Science
Rocket
Thor Delta E
Launch site
Vandenberg SFB, CA, USA
Launch pad
Space Launch Complex 2E
Payload
—
Target orbit
SSO
Thor Delta E | ESSA 4 cover image

Mission timeline

  1. 1967-01-26T17:31:00.000Z
    Liftoff
    Liftoff confirmed — Thor Delta E is airborne.
  2. Max-Q
    Max Q — Thor Delta E endures peak structural stress during ascent.
  3. Main engine cutoff (MECO)
    First-stage main engine cutoff (MECO) confirmed.
  4. Stage separation
    The spent first stage separates from the upper stage.
  5. Second-stage ignition
    Upper stage ignites, continuing the journey toward orbit.
  6. Orbit insertion
    The mission reaches SSO, successfully entering orbit.
  7. Mission success
    The mission concludes successfully.

Last updated: