Saturday, April 25, 1992
Sunday, April 19, 1992
Explorer 2
1958-F02
The second Explorer was launched on 1958 Mar 5 by Juno I. Stage 4 failed to ignite and Explorer II did not achieve orbit. The main innovation on Explorer II was a tape recorder to store cosmic ray data for regions not covered by ground stations.
Intended orbit was 351 x 1459 x 34.1.
Explorer 2 to 5 were formally under ARPA.
| Explorer II | |||
| Date | Time | Event | Orbit |
|---|---|---|---|
| 1958 Mar 5 | 1827:57 | Launch by Juno I | CC LC26A |
| T+2:29 Redstone cutoff (LOX depl.) | |||
| T+2:33 Redstone sep | |||
| 1834:29 | Stage 2 burn T+6:30, 376 km | -5911 x 380 | |
| Stage 2 cutoff | |||
| 1834:45 | Stage 3 burn T+6:46 | ||
| 1834:53 | Stage 3 cutoff | ||
| 1834:58 | Stage 4 failed to ignite | -3599 x 379 x 34.1 | |
| 1841? | Stage 4/payload impact, range 3260 km | ||
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