# List of Thor DM-18 launches

Thor was a US space launch vehicle derived from the PGM-17 Thor intermediate-range ballistic missile. The Thor rocket was the first member of the Delta rocket family of space launch vehicles.

## Launch statistics
### Launch outcome

* Failure
* Success
* Partial Failure

## Launch history

The data in this table comes from :
| Date/Time (UTC) | Rocket | S/N | Launch Site | Payload | Function | Orbit | Outcome | Remarks |
| 1957-01-26 | Thor DM-18 | Thor 101 | CCAFS LC-17B | | Missile test | Suborbital | Failure | Maiden flight of Thor, first launch from LC-17. Contaminated LOX caused loss of thrust at liftoff. Vehicle fell back onto the pad and exploded. |
| 1957-04-20 04:33 | Thor DM-18 | Thor 102 | CCAFS LC-17B | | Missile test | Suborbital | Failure | RSO sent a mistaken destruct command at T+35 seconds due to an incorrect console readout. |
| 1957-08-30 | Thor DM-18 | Thor 104 | CCAFS LC-17A | | Missile test | Suborbital | Failure | First launch from LC-17A. Control malfunction led to missile breakup at T+92 seconds. |
| 1957-09-20 | Thor DM-18 | Thor 105 | CCAFS LC-17B | | Missile test | Suborbital | Success | |
| 1957-10-03 17:14 | Thor DM-18 | Thor 107 | CCAFS LC-17A | | Missile test | Suborbital | Failure | Stuck valve prevented the gas generator from starting. Missile fell back onto the pad and exploded. |
| 1957-10-11 16:33 | Thor DM-18 | Thor 108 | CCAFS LC-17B | | Missile test | Suborbital | Failure | Turbopump failure at T+152 seconds. Flight considered a "partial success". |
| 1957-10-24 16:32 | Thor DM-18 | Thor 109 | CCAFS LC-17A | | Missile test | Suborbital | Success | |
| 1957-12-07 22:11 | Thor DM-18 | Thor 112 | CCAFS LC-17B | | Missile test | Suborbital | Success | |
| 1957-12-19 20:12 | Thor DM-18 | Thor 113 | CCAFS LC-17A | | Missile test | Suborbital | Success | |
| 1958-01-28 20:16 | Thor DM-18 | Thor 114 | CCAFS LC-17A | | Missile test | Suborbital | Failure | Electrical malfunction led to control failure. RSO T+152 seconds. |
| 1958-02-28 13:08 | Thor DM-18 | Thor 120 | CCAFS LC-17B | | Missile test | Suborbital | Failure | Premature engine shutdown at T+109 seconds. |
| 1958-04-19 13:30 | Thor DM-18 | Thor 121 | CCAFS LC-17B | | Missile test | Suborbital | Failure | Missile lost thrust and fell back onto the pad, exploding. Suspected fuel line obstruction. |
| 1958-04-24 00:10 | Thor DM-18 Able | Thor 116 | CCAFS LC-17A | | RTV test | Suborbital | Failure | Maiden flight of Thor-Able. Turbopump failure T+146 seconds. |
| 1958-06-04 21:17 | Thor DM-18 | Thor 115 | CCAFS LC-18B | | Missile test | Suborbital | Success | First launch from LC-18B |
| 1958-06-13 15:06 | Thor DM-18 | Thor 122 | CCAFS LC-17B | | Missile test | Suborbital | Success | |
| 1958-07-10 15:06 | Thor DM-18 Able | Thor 118 | CCAFS LC-17A | | RTV test | Suborbital | Success | |
| 1958-07-13 06:36 | Thor DM-18 | Thor 123 | CCAFS LC-17B | | Missile test | Suborbital | Success | Performance was normal through the boost phase, but the BECO and warhead separation signals were never received. |
| 1958-07-23 22:13 | Thor DM-18 Able | Thor 119 | CCAFS LC-17A | | RTV test | Suborbital | Success | Biological nose cone containing a mouse. The nose cone sank into the ocean and was not recovered. |
| 1958-07-26 06:40 | Thor DM-18 | Thor 126 | CCAFS LC-17B | | Missile test | Suborbital | Failure | LOX valve malfunction led to loss of thrust and vehicle breakup at T+55 seconds |
| 1958-08-06 | Thor DM-18 | Thor 117 | CCAFS LC-18B | | Missile test | Suborbital | Success | Final flight of Thor DM-18 missile |
| 1958-08-17 12:18 | Thor DM-18 Able-I | Thor 127 | CCAFS LC-17A | Pioneer 0 | Lunar orbiter | High Altitude | Failure | Maiden flight of Thor-Able I. First use of a Thor-based vehicle for an orbital launch. Turbopump failure, T+73,6 seconds. |
| 1958-10-11 08:42:13 | Thor DM-18 Able-I | Thor 130 | CCAFS LC-17A | Pioneer 1 | Lunar orbiter | High Altitude | Failure | Third stage underperformed |
| 1958-11-05 08:53 | Thor DM-18A | Thor 138 | CCAFS LC-17B | | Missile test | Suborbital | Failure | Maiden flight of Thor DM-18A. Flight control failure. RSO T+45 seconds. |
| 1958-11-08 08:42:13 | Thor DM-18 Able-I | Thor 129 | CCAFS LC-17A | Pioneer 2 | Lunar orbiter | High Altitude | Failure | Third stage failed to ignite |
| 1958-11-26 09:09 | Thor DM-18A | Thor 140 | CCAFS LC-17B | | Missile test | Suborbital | Partial failure | Loss of guidance system power caused the missile to overshoot its target point by 22 miles. |
| 1958-12-06 00:41 | Thor DM-18A | Thor 145 | CCAFS LC-18B | | Missile test | Suborbital | Partial failure | LOX tank pressurization failure led to loss of thrust. Missile impacted 20 miles short of the target point. |
| 1958-12-16 23:44:45 | Thor DM-18A | Thor 151 | VAFB LC-75-1-1 | | Missile test | Suborbital | Success | First Thor launch from Vandenberg AFB |
| 1958-12-17 04:00 | Thor DM-18A | Thor 146 | CCAFS LC-17B | | Missile test | Suborbital | Success | |
| 1958-12-31 02:00 | Thor DM-18A | Thor 138 | CCAFS LC-18B | | Missile test | Suborbital | Failure | Flight control failure. RSO T+40 seconds. |
| 1959-01-23 | Thor DM-18 Able-II | Thor 128 | CCAFS LC-17A | | RVX test | Suborbital | Failure | Thor portion of flight successful. Staging failed due to an electrical malfunction. Vehicle fell into the Atlantic Ocean. |
| 1959-01-30 23:53 | Thor DM-18A | Thor 154 | CCAFS LC-17B | | Missile test | Suborbital | Success | |
| 1959-02-28 07:58 | Thor DM-18 Able-II | Thor 131 | CCAFS LC-17A | | RVX test | Suborbital | Success | |
| 1959-02-28 21:49:16 | Thor DM-18 Agena-A | Thor 163 Agena 1022 | VAFB LC-75-3-4 | Discoverer 1 | Reconnaissance | LEO | Failure | Maiden flight of Thor-Agena. Agena telemetry lost T+730 seconds. Fate of the payload unknown, but generally presumed to have impacted somewhere in Antarctica. |
| 1959-03-21 06:19 | Thor DM-18 Able-II | Thor 132 | CCAFS LC-17A | | RVX test | Suborbital | Success | |
| 1959-03-22 00:58 | Thor DM-18A | Thor 158 | CCAFS LC-18B | | Missile test | Suborbital | Success | |
| 1959-03-27 04:02 | Thor DM-18A | Thor 162 | CCAFS LC-17B | | Missile test | Suborbital | Success | |
| 1959-04-08 06:35 | Thor DM-18 Able-II | Thor 133 | CCAFS LC-17A | | RVX test | Suborbital | Success | |
| 1959-04-13 21:18:39 | Thor DM-18 Agena-A | Thor 170 Agena 1018 | VAFB LC-75-3-4 | Discoverer 2 | Reconnaissance | LEO | Success | |
| 1959-04-16 20:46 | Thor DM-18A | Thor 161 | VAFB LC-75-2-8 | | Missile test | Suborbital | Success | |
| 1959-04-23 05:30 | Thor DM-18A | Thor 176 | CCAFS LC-17B | | Missile test | Suborbital | Success | |
| 1959-04-25 05:00 | Thor DM-18A | Thor 164 | CCAFS LC-18B | | Missile test | Suborbital | Success | |
| 1959-05-12 17:35 | Thor DM-18A | Thor 187 | CCAFS LC-17B | | Missile test | Suborbital | Success | |
| 1959-05-21 06:40 | Thor DM-18 Able-II | Thor 135 | CCAFS LC-17A | | RVX test | Suborbital | Success | |
| 1959-05-23 02:42 | Thor DM-18A | Thor 184 | CCAFS LC-18B | | Missile test | Suborbital | Success | |
| 1959-06-03 20:09:20 | Thor DM-18 Agena-A | Thor 174 Agena 1020 | VAFB LC-75-3-4 | Discoverer 3 | Reconnaissance | LEO | Failure | Agena attitude control malfunction pointed the stage in the wrong direction, sending it into the Pacific Ocean rather than orbit. |
| 1959-06-11 06:44 | Thor DM-18 Able-II | Thor 137 | CCAFS LC-17A | | RVX test | Suborbital | Success | |
| 1959-06-16 21:45 | Thor DM-18A | Thor 191 | VAFB LC-75-2-7 | | Missile test | Suborbital | Failure | Pitch and roll program failed to initiate. RSO T+50 seconds. |
| 1959-06-25 22:47:45 | Thor DM-18 Agena-A | Thor 179 Agena 1023 | VAFB LC-75-3-5 | Discoverer 4 | Reconnaissance | LEO | Failure | Agena developed insufficient thrust to attain orbital velocity. |
| 1959-06-26 | Thor DM-18A | Thor 198 | CCAFS LC-18B | | Missile test | Suborbital | Success | |
| 1959-06-30 02:37 | Thor DM-18A | Thor 194 | CCAFS LC-17B | | Missile test | Suborbital | Success | |
| 1959-07-21 07:33 | Thor DM-18A | Thor 203 | CCAFS LC-17B | | Missile test | Suborbital | Failure | Pitch and roll program failed to initiate. RSO T+40 seconds. |
| 1959-07-24 12:47 | Thor DM-18A | Thor 202 | CCAFS LC-18B | | Missile test | Suborbital | Success | |
| 1959-08-03 21:41 | Thor DM-18A | Thor 175 | VAFB LC-75-1-1 | | Missile test | Suborbital | Success | |
| 1959-08-06 02:48 | Thor DM-18A | Thor 208 | CCAFS LC-17B | | Missile test | Suborbital | Success | |
| 1959-08-07 14:24:20 | Thor DM-18 Able-III | Thor 134 | CCAFS LC-17A | Explorer 6 | Radiation | HEO | Success | |
| 1959-08-13 19:00:08 | Thor DM-18 Agena-A | Thor 192 Agena 1029 | VAFB LC-75-3-4 | Discoverer 5 | Reconnaissance | LEO | Success | |
| 1959-08-14 09:00 | Thor DM-18A | Thor 204 | CCAFS LC-18B | | Missile test | Suborbital | Success | |
| 1959-08-14 19:36:04 | Thor DM-18A | Thor 190 | VAFB LC-75-2-6 | | Missile test | Suborbital | Partial failure | Premature propellant depletion. Planned range not achieved. |
| 1959-08-19 19:24:44 | Thor DM-18 Agena-A | Thor 200 Agena 1028 | VAFB LC-75-3-5 | Discoverer 6 | Reconnaissance | LEO | Success | |
| 1959-08-27 12:30 | Thor DM-18A | Thor 216 | CCAFS LC-17B | | Missile test | Suborbital | Success | |
| 1959-09-12 | Thor DM-18A | Thor 217 | CCAFS LC-18B | | Missile test | Suborbital | Success | |
| 1959-09-17 14:34 | Thor DM-18 Able-II | Thor 136 | CCAFS LC-17A | Transit 1A | Navigation | LEO | Failure | Third stage malfunctioned |
| 1959-09-17 21:09 | Thor DM-18A | Thor 228 | VAFB LC-75-1-2 | | Missile test | Suborbital | Success | |
| 1959-09-22 18:00 | Thor DM-18A | Thor 222 | CCAFS LC-17B | | Missile test | Suborbital | Success | |
| 1959-10-06 16:41 | Thor DM-18A | Thor 235 | CCAFS LC-18B | | Missile test | Suborbital | Success | |
| 1959-10-06 18:26 | Thor DM-18A | Thor 239 | VAFB LC-75-2-8 | | Missile test | Suborbital | Success | |
| 1959-10-14 04:15 | Thor DM-18A | Thor 221 | CCAFS LC-17B | | Missile test | Suborbital | Success | |
| 1959-10-21 22:57 | Thor DM-18A | Thor 220 | VAFB LC-75-1-1 | | Missile test | Suborbital | Success | |
| 1959-10-29 02:12 | Thor DM-18A | Thor 230 | CCAFS LC-18B | | Missile test | Suborbital | Success | |
| 1959-11-03 | Thor DM-18A | Thor 238 | CCAFS LC-17B | | Missile test | Suborbital | Success | |
| 1959-11-07 20:28:41 | Thor DM-18 Agena-A | Thor 206 Agena 1051 | VAFB LC-75-3-4 | Discoverer 7 | Reconnaissance | LEO | Success | |
| 1959-11-12 19:24 | Thor DM-18A | Thor 181 | VAFB LC-75-1-2 | | Missile test | Suborbital | Success | |
| 1959-11-19 | Thor DM-18A | Thor 244 | CCAFS LC-17B | | Missile test | Suborbital | Success | |
| 1959-11-20 19:25:24 | Thor DM-18 Agena-A | Thor 212 Agena 1050 | VAFB LC-75-3-5 | Discoverer 8 | Reconnaissance | LEO | Failure | Orbit too eccentric for use of return capsule |
| 1959-12-01 17:00 | Thor DM-18A | Thor 254 | CCAFS LC-18B | | Missile test | Suborbital | Success | |
| 1959-12-02 05:29 | Thor DM-18A | Thor 265 | VAFB LC-75-1-1 | | Missile test | Suborbital | Failure | |
| 1959-12-15 02:14 | Thor DM-18A | Thor 185 | VAFB LC-75-1-2 | | Missile test | Suborbital | Failure | Flight control failure. Missile broke up T+60 seconds. |
| 1959-12-17 | Thor DM-18A | Thor 255 | CCAFS LC-17B | | Missile test | Suborbital | Success | |
| 1960-01-14 16:35 | Thor DM-18C | Thor 256 | CCAFS LC 18B | | Missile test | Suborbital | Success | Maiden flight of Thor DM-18C |
| 1960-01-21 20:10 | Thor DM-18A | Thor 215 | VAFB LC-75-1-2 | | Missile test | Suborbital | Success | |
| 1960-02-04 18:51:45 | Thor DM-18 Agena-A | Thor 218 Agena 1052 | VAFB LC-75-3-4 | Discoverer 9 | Reconnaissance | LEO | Failure | Premature Thor cutoff. Agena could not attain orbital velocity. |
| 1960-02-09 17:11 | Thor DM-18C | Thor 259 | CCAFS LC-18B | | Missile test | Suborbital | Success | |
| 1960-02-19 20:15:14 | Thor DM-18 Agena-A | Thor 223 Agena 1054 | VAFB LC-75-3-5 | Discoverer 10 | Reconnaissance | LEO | Failure | Thor flight control malfunction. RSO T+52 seconds. |
| 1960-02-29 | Thor DM-18C | Thor 263 | CCAFS LC-18B | | Missile test | Suborbital | Success | |
| 1960-03-02 20:06 | Thor DM-18A | Thor 272 | VAFB LC-75-2-8 | | Missile test | Suborbital | Success | |
| 1960-03-11 13:00 | Thor DM-18 Able-IV | Thor 219 | CCAFS LC 17A | Pioneer 5 | Scientific | Heliocentric | Success | Only flight of Thor-Able IV |
| 1960-04-01 11:40:09 | Thor DM-18 Able-II | Thor 148 | CCAFS LC-17A | TIROS-1 | Weather | SSO | Success | Final flight of Thor-Able |
| 1960-04-15 20:30:37 | Thor DM-18 Agena-A | Thor 234 Agena 1055 | VAFB LC-75-3-5 | Discoverer 11 | Reconnaissance | LEO | Success | |
| 1960-06-22 23:26 | Thor DM-18A | Thor 233 | VAFB LC-75-2-7 | | Missile test | Suborbital | Success | |
| 1960-06-29 22:00:44 | Thor DM-18 Agena-A | Thor 160 Agena 1053 | VAFB LC-75-3-4 | Discoverer 12 | Reconnaissance | LEO | Failure | Agena attitude control malfunction. |
| 1960-08-10 20:37:54 | Thor DM-18 Agena-A | Thor 231 Agena 1057 | VAFB LC-75-3-5 | Discoverer 13 | Reconnaissance | LEO | Success | First successful recovery of a manmade object from orbit. |
| 1960-08-18 19:57:08 | Thor DM-18 Agena-A | Thor 237 Agena 1056 | VAFB LC-75-3-4 | Discoverer 14 | Reconnaissance | LEO | Success | |
| 1960-09-13 22:14 | Thor DM-18 Agena-A | Thor 246 Agena 1058 | VAFB LC-75-3-5 | Discoverer 15 | Reconnaissance | LEO | Success | |
| 1960-10-11 21:53 | Thor DM-18A | Thor 186 | VAFB LC-75-2-8 | | Missile test | Suborbital | Success | |
| 1960-12-13 20:08 | Thor DM-18A | Thor 267 | VAFB LC-75-2-8 | | Missile test | Suborbital | Success | |
| 1961-03-30 05:13:43 | Thor DM-18A | Thor 243 | VAFB LC-75-2-7 | | Missile test | Suborbital | Success | |
| 1961-06-20 23:54 | Thor DM-18A | Thor 276 | VAFB LC-75-2-7 | | Missile test | Suborbital | Success | |
| 1961-09-06 22:30 | Thor DM-18A | Thor 165 | VAFB LE-7 | | Missile test | Suborbital | Success | |
| 1961-12-06 01:30 | Thor DM-18A | Thor 214 | VAFB LE-8 | | Missile test | Suborbital | Success | |
| 1962-03-19 23:28 | Thor DM-18A | Thor 229 | VAFB LE-7 | | Missile test | Suborbital | Success | |
| 1962-06-19 00:30 | Thor DM-18A | Thor 269 | VAFB LE-8 | | Missile test | Suborbital | Success | |