Thor Delta C — mission imagery
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Success

Explorer 21

Thor Delta CUnited States Air ForceSpace Launch Complex 17A
Sunday, October 4, 1964 · 03:45 AM UTCAdd to Calendar

This mission is complete.

Vehicle

Thor Delta C

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Vehicle details are not available yet.

HeightN/A
LEO PayloadN/A
Launches1078
Successes972

Provider

United States Air Force

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Provider details are not available yet.

Mission Brief

Explorer 21 (IMP 2) was a solar-cell and chemical-battery powered spacecraft instrumented for interplanetary and distant magnetospheric studies of energetic particles, cosmic rays, magnetic fields, and plasmas.

PayloadExplorer 21
OrbitElliptical Orbit
CustomerUnited States Air Force
Stages0
PadSpace Launch Complex 17A, Cape Canaveral SFS, FL, USA

Mission Timeline

14 / 14100%

Ground vector

Launch site

Site locked

Space Launch Complex 17A

Cape Canaveral SFS, FL, USA

Global range
SITE LOCK
Latitude
28.447°N
Longitude
80.565°W

Range Weather

Launch commit criteria

Clear
Watch
TrackingNo active constraints
Weather Rules

Tracking no weather issues at this time.

Primary concern
No weather issues
Rule count
0
Temperature
Not reported
Surface wind
Not reported
Window

03:45 AM UTC - 03:45 AM UTC

Delay History

1
Oct 4Oct 4Success → Success

Schedule updated