Thor Delta L Launch History
Every orbital and deep-space launch attempt by the Thor Delta L, 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 L made 2 orbital and deep-space launch attempts between 1969 and 1972. It is part of the Thor family. Of those, 1 succeeded and 1 failed. The success rate comes to 50 percent. The busiest year was 1969, with 1 flight. The most recent flight in the catalog was in 1972.
2
Launch attempts
1
Successes
1
Failures
50%
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 L launched from, across every launch in the catalog.
| Site | Country | Launches | Successes | Failures |
|---|---|---|---|---|
| V | 🇺🇸United States | 1 | 1 | 0 |
| CC | 🇺🇸United States | 1 | 0 | 1 |
Launch chronology
Every Thor Delta L launch in the catalog, newest first.
| Date | Designator | Payloads | Site / Pad | Outcome |
|---|---|---|---|---|
| Jan 31, 1972 | 1972-005 | 564/D087 : HEOS 2 despin weight, FW4D, HEOS A2 +5 more, Improved Delta PLF, LT Thor DSV-2L-1B 564, Castor 2, Delta 87 clamp band half, Delta DSV-3E-4 | V / SLC2E | Success |
| Aug 27, 1969 | 1969-F12 | 540/D073 : Improved Delta PLF, LT Thor DSV-2L-1B 540, Castor 2 +4 more, FW4D, DSV-3E-3 73, Pioneer E, ERS 32 | CC / LC17A | Failure |