Program
IMP
- Payloads
- 10
- In orbit
- 4
- Operational (CelesTrak)
- 0
- Re-entered
- 6
- First launch
- 1963-11-27
- Latest launch
- 1973-10-26
Owners
Built by
Payloads in this program
| Name | Status |
|---|---|
| EXPLORER 18 (IMP-1) | Re-entered 1965-12-30 |
| EXPLORER 21 (IMP-2) | Re-entered 1966-01-30 |
| EXPLORER 28 (IMP-3) | Re-entered 1968-07-04 |
| EXPLORER 33 (AIMP-D) | - |
| EXPLORER 34 (IMP-4) | Re-entered 1969-05-03 |
| EXPLORER 35 (AIMP-E) | - |
| EXPLORER 41 (IMP-5) | Re-entered 1972-12-23 |
| EXPLORER 43 (IMP-6) | Re-entered 1974-10-02 |
| EXPLORER 47 (IMP-7) | - |
| EXPLORER 50 (IMP-8) | Not operational |
From GCAT by Jonathan McDowell (CC BY 4.0). Roles are counted from the catalogue itself, not from GCAT type labels, which GCAT describes as patchy. About this source