Thor Delta B
Thor family
· built by McDonnell Douglas
· maiden flight 1962-12-13
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
31.0 mLength
2.44 mDiameter
51 tLaunch mass
3Stages
667 kNLiftoff thrust
Payload Capacity
370 kgTo LEO
68 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.
9Total launches
8Successful
1Failed
0Upcoming
Launches Tracked on This Site
9In our archive
88.9%Success rate
Dec 13, 1962 23:30 UTCEarliest tracked
Mar 19, 1964 11:13 UTCMost recent
| Mission | Date | Status |
|---|---|---|
| Thor Delta B | Beacon Explorer A | Mar 19, 1964 11:13 UTC | Failure |
| Thor Delta B | Relay 2 | Jan 21, 1964 21:14 UTC | Success |
| Thor Delta B | Tiros 8 | Dec 21, 1963 09:30 UTC | Success |
| Thor Delta B | Syncom 2 | Jul 26, 1963 14:33 UTC | Success |
| Thor Delta B | Tiros 7 | Jun 19, 1963 09:50 UTC | Success |
| Thor Delta B | Telstar 2 | May 07, 1963 11:38 UTC | Success |
| Thor Delta B | Explorer 17 | Apr 03, 1963 02:00 UTC | Success |
| Thor Delta B | Syncom 1 | Feb 14, 1963 05:35 UTC | Success |
| Thor Delta B | Relay 1 | Dec 13, 1962 23:30 UTC | Success |