Launch SuccessfulUnited States Air Force

Thor Delta E: ESSA 4

Name: Thor Delta E: ESSA 4
Start: 1967-01-26T17:31:00Z
End: 1967-01-26T17:31:00Z
Location: Space Launch Complex 2E

The ESSA series was the second generation of US meterological satellites after the TIROS (Television & Infra-Red Observation Satellite) series. They were also called OT (Operational TIROS), TOS (TIROS Operational Satellite).

Thursday, 26 January 1967

Mission Data

🇺🇸United States Air ForceEst. 1947

Launch VehicleThor Delta E

Vehicle FamilyThor

Vehicle Record6 of 6 launches (100%)

Provider TypeGovernment

Agency Record972 successes / 106 failures (90%)

Success Streak68 consecutive

Mission TypeEarth Science

Target OrbitSun-Synchronous Orbit

Launch PadSpace Launch Complex 2E

Location🇺🇸 Vandenberg SFB, CA, USA USA

Orbital Launches This Year#6

Agency Launches This Year#4

Launches From This Pad47

Launches From This Site923

Status Note

The launch vehicle successfully inserted its payload(s) into the target orbit(s).

About Thor Delta E

American orbital launch vehicle family with Thor first stage and a delta second stage.

Launch Site

Space Launch Complex 2E · 34.7516°N 120.6192°W

Launch data from Launch Library 2 by The Space Devs.