Thor Delta E1
Thor family
· built by McDonnell Douglas
· maiden flight 1966-07-01
Profile data last updated: 2026-08-29T15:37:07.354998+00:00 | 7531-10-17
American orbital launch vehicle family with Thor first stage and a delta second stage.
Specifications
28.0 mLength
2.44 mDiameter
68 tLaunch mass
4Stages
1450 kNLiftoff thrust
Payload Capacity
540 kgTo LEO
150 kgTo GTO
Lifetime Launch Record
As reported by Launch Library 2 across this rocket's entire history, not just the launches tracked on this site.
17Total launches
16Successful
1Failed
0Upcoming
Launches Tracked on This Site
17In our archive
94.1%Success rate
Jul 01, 1966 16:02 UTCEarliest tracked
Apr 01, 1971 02:57 UTCMost recent
| Mission | Date | Status |
|---|---|---|
| Thor Delta E1 | Isis 2 | Apr 01, 1971 02:57 UTC | Success |
| Thor Delta E1 | IMP G | Jun 21, 1969 08:47 UTC | Failure |
| Thor Delta E1 | ESSA 9 | Feb 26, 1969 07:47 UTC | Success |
| Thor Delta E1 | Isis 1 | Jan 30, 1969 06:46 UTC | Success |
| Thor Delta E1 | HEOS 1 | Dec 05, 1968 18:55 UTC | Success |
| Thor Delta E1 | Pioneer 9 | Nov 08, 1968 09:46 UTC | Success |
| Thor Delta E1 | GEOS B | Jan 11, 1968 16:16 UTC | Success |
| Thor Delta E1 | Pioneer 8 | Dec 13, 1967 14:08 UTC | Success |
| Thor Delta E1 | ESSA 6 | Nov 10, 1967 17:53 UTC | Success |
| Thor Delta E1 | INTELSAT II F-4 | Sep 28, 1967 00:45 UTC | Success |
| Thor Delta E1 | Explorer 35 | Jul 19, 1967 14:19 UTC | Success |
| Thor Delta E1 | IMP F | May 24, 1967 14:05 UTC | Success |
| Thor Delta E1 | INTELSAT II F-3 | Mar 23, 1967 01:30 UTC | Success |
| Thor Delta E1 | INTELSAT II F-2 | Jan 11, 1967 10:55 UTC | Success |
| Thor Delta E1 | INTELSAT II F-1 | Oct 26, 1966 23:05 UTC | Success |