Thor Delta E1 Launch History
Every orbital and deep-space launch attempt by the Thor Delta E1, year by year, drawn from the GCAT launch catalog. It is one of the variants covered on the Thor family page.
Data current as of 2026-07-20.
Thor Delta E1 made 17 orbital and deep-space launch attempts between 1966 and 1971. It is part of the Thor family. All 17 flights succeeded. The busiest year was 1967, with 7 flights. The most recent flight in the catalog was in 1971.
17
Launch attempts
17
Successes
0
Failures
100%
Success rate
Launches per year
Successes
Failures
Each bar links to that year's full chronology.
Year by year
Launch sites used
Sites the Thor Delta E1 launched from, across every launch in the catalog.
| Site | Country | Launches | Successes | Failures |
|---|---|---|---|---|
| CC | 🇺🇸United States | 11 | 11 | 0 |
| V | 🇺🇸United States | 6 | 6 | 0 |
Launch chronology
Every Thor Delta E1 launch in the catalog, newest first.
| Date | Designator | Payloads | Site / Pad | Outcome |
|---|---|---|---|---|
| Apr 1, 1971 | 1971-024 | 491/D084 : DSV-3E-3 84, Improved Delta PLF, Thor DSV-2C 491 +4 more, Castor, deb Isis 2, FW4D, Isis B | V / SLC2E | Success |
| Jun 21, 1969 | 1969-053 | 482/D069 : Explorer 41 despin weight, FW4D S/N 2322-2, IMP G +4 more, DSV-3E-3 S/N 20226, Improved Delta PLF, Thor DSV-2C 482, Castor 2 | V / SLC2W | Success |
| Feb 26, 1969 | 1969-016 | 483/D067 : DSV-3E-3 S/N 20225, Improved Delta PLF, Thor DSV-2C 483 +4 more, Castor 1, ESSA 9 despin weight, FW4D S/N 2322-1, TOS G | CC / LC17B | Success |
| Jan 30, 1969 | 1969-009 | 485/D065 : DSV-3E-3 65, Improved Delta PLF, Thor DSV-2C 485 +5 more, Castor 1, deb Isis 1, FW4D S/N 2226-10, Isis 1 launch debris, Isis A | V / SLC2E | Success |
| Dec 5, 1968 | 1968-109 | 481/D061 : HEOS-1 S-16 Barium Canister, HEOS 1 despin weight, FW4D +5 more, HEOS A1, Improved Delta PLF, Thor DSV-2C 481, Castor, DSV-3E-3 61 | CC / LC17B | Success |
| Nov 8, 1968 | 1968-100 | 479/D060 : Pioneer D, FW4D, Improved Delta PLF +6 more, Thor DSV-2C 479, Castor 2, Canister cover, DSV-3E-3 S/N 20220, TETR 2 cover part, ERS 31 | CC / LC17B | Success |
| Jan 11, 1968 | 1968-002 | 454/D056 : deb FW4D, DSV-3E-3 S/N 20209, Improved Delta PLF +5 more, Thor DSV-2C 454, Castor 2, Explorer 36 despin weight, FW4D S/N 2226-6, Geos B | V / SLC2E | Success |
| Dec 13, 1967 | 1967-123 | 489/D055 : Pioneer C, FW4D S/N 2226-5, Improved Delta PLF +5 more, Thor DSV-2C (S/N 20219), Castor 1, Delta 55 launch debris, DSV-3E-3 S/N 20218, ERS 30 | CC / LC17B | Success |
| Nov 10, 1967 | 1967-114 | 480/D054 : DSV-3E-3 S/N 20221, Improved Delta PLF, Thor DSV-2C 480 +5 more, Castor 1, FW4D yo weight, ESSA 6 despin weight, FW4D S/N 41105, TOS D | V / SLC2E | Success |
| Sep 28, 1967 | 1967-094 | 442/D052 : Improved Delta PLF, Thor DSV-2C (S/N 20201), Castor +5 more, FW4D S/N 41104, SVM-1 S/N 33, Delta 52 launch debris, DSV-3E-3 S/N 20215, INTELSAT II F-4 | CC / LC17B | Success |
| Jul 19, 1967 | 1967-070 | 488/D050 : Star 13, FW-4D yo weight, AIMP E +8 more, AIMP E despin weight, FW4D S/N 00006, Improved Delta PLF, Thor DSV-2C (S/N 20218), Castor S/N 583, Castor S/N 582, Castor S/N 581, DSV-3E-3 S/N 20217 | CC / LC17B | Success |
| May 24, 1967 | 1967-051 | 486/D049 : Explorer 34 despin weight, FW4D S/N 40101, IMP F +4 more, DSV-3E-3, Improved Delta PLF, Thor DSV-2C 486, Castor | V / SLC2E | Success |
| Mar 23, 1967 | 1967-026 | 470/D047 : Improved Delta PLF, Thor DSV-2C (S/N 20210), Castor +4 more, SVM-1 S/N A-24, FW4D S/N 00005, DSV-3E-3 S/N 20211, INTELSAT II F-3 | CC / LC17B | Success |
| Jan 11, 1967 | 1967-001 | 468/D044 : Improved Delta PLF, Thor DSV-2C (S/N 20209), Castor +26 more, Unknown US GTO debris, [UNID053] RCS 0.7, [UNID052] RCS 0.2, Unknown US GTO debris parent, SVM-1, [UNID105] RCS 5.2, [UNID093] RCS 1.6, [UNID055] RCS 0.1, [UNID054], [UNID051], [UNID050], [UNID049], [UNID048], [UNID046], [UNID045], [UNID040], [UNID037] RCS 0.0, [UNID036], [UNID035], [UNID034], [UNID033], [UNID016] RCS 1.2, FW4D S/N 00004, Delta 44 attach clamp, DSV-3E-3 S/N 20208, INTELSAT II F-2 | CC / LC17B | Success |
| Oct 26, 1966 | 1966-096 | 464/D042 : Improved Delta PLF, Thor DSV-2C (S/N 20207), Castor +4 more, FW4D S/N 00003, SVM-1, DSV-3E-3 S/N 20206, INTELSAT II F-1 | CC / LC17B | Success |
| Aug 17, 1966 | 1966-075 | 462/D040 : Pioneer B, FW4D S/N 00002, Improved Delta PLF +4 more, Thor DSV-2C (S/N 20205), Castor 1, Delta 40 attach clamp, DSV-3E-3 S/N 20204 | CC / LC17A | Success |
| Jul 1, 1966 | 1966-058 | 467/D039 : Star 13, AIMP D, FW-4D yo weight +9 more, AIMP D despin weight, FW4D S/N 00001, Improved Delta PLF, Thor DSV-2C 467 S/N 20208, Castor S/N 541, Castor S/N 540, Castor S/N 509, Delta attach clamp, DSV-3E-3 S/N 20207 | CC / LC17A | Success |