United States Air ForceThor-DeltaSpace Launch Complex 17A, Cape Canaveral SFS, FL, USA
Delta DM-19 | Explorer 12
Launch window
No countdown — this launch time is not yet known to the minute.August 16, 1961Add to calendar
Image: San Diego Air & Space Museum
United States Air Force's 54th launch · 16th this year · humanity's 120th orbital launch attempt
The launch vehicle successfully inserted its payload(s) into the target orbit(s).
Window: Aug 16, 03:21 – Aug 16, 03:21 UTC
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Explorer 12
Explorer 12 (Energetic Particles Explorer A) was a NASA satellite sent into a highly elliptical orbit reaching about 77,000 km to study the solar wind, the interplanetary and geomagnetic fields, and the Van Allen belts. It returned data for 112 days before its power system failed.
Heliophysics · Elliptical Orbit (Elliptical)
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