Delta B
Delta B prior to the launch of TIROS-8 | |
Function | Expendable launch system |
---|---|
Country of origin | United States |
Capacity | |
Payload to LEO | |
Altitude | 350 nautical miles (650 km; 400 mi) |
Mass | 800 pounds (360 kg)[1] |
Payload to Earth escape trajectory | |
Mass | 130 pounds (59 kg)[1] |
Launch history | |
Status | Retired[2] |
Launch sites | Cape Canaveral LC-17[3] |
Total launches | 9 |
Success(es) | 8 |
Failure(s) | 1 |
First flight | 13 December 1962 |
Last flight | 19 March 1964 |
[edit on Wikidata] |
The Delta B, or Thor-Delta B was an American expendable launch system used for nine orbital launches between 1962 and 1964.[3] A derivative of the Thor-Delta, it was a member of the Delta family of rockets.[4]
The first stage was a Thor missile in the DM-21 configuration, and the second stage was the AJ10-118,[1] which was derived from the earlier Delta-A.[4] An Altair solid rocket motor was used as a third stage.[1]
All nine launches occurred from Cape Canaveral Air Force Station Launch Complex 17.[3] Most of the launches carried communications satellites, including Syncom-1[2] and Syncom-2.[2] Syncom-1 was intended to be the first satellite to be placed into a geosynchronous orbit, however the spacecraft malfunctioned prior to reaching this orbit.[5]Syncom-2 subsequently became the first geosynchronous satellite,[5] and was placed at 55° west of the Greenwich Meridian. The final launch failed due to third stage underperformance,[6] all other launches were successful.[3]
Delta B launches
Delta B was launched nine times:[3]
Date | Ser. | Launch site | Payload |
---|---|---|---|
13.12.1962 | Thor 355 Delta 15 | LC-17A | Relay 1 |
14.02.1963 | Thor 358 Delta 16 | LC-17B | Syncom 1 |
03.04.1963 | Thor 357 Delta 17 | LC-17B | Explorer 17 |
07.05.1963 | Thor 366 Delta 18 | LC-17B | Telstar 2 |
19.06.1963 | Thor 359 Delta 19 | LC-17B | TIROS 7 |
26.07.1963 | Thor 370 Delta 20 | LC-17A | Syncom 2 |
21.12.1963 | Thor 371 Delta 22 | LC-17B | TIROS 8 |
21.01.1964 | Thor 373 Delta 23 | LC-17B | Relay 2 |
19.03.1964 | Thor 391 Delta 24 | LC-17A | Explorer (failed) |
References
- ^ a b c d Launch Vehicles of the National Launch Vehicle Program (PDF) (Technical report). Washington, D.C.: NASA. November 1962. p. 7. N63-10712. Archived (PDF) from the original on December 6, 2022. Retrieved May 31, 2023.
- ^ a b c Wade, Mark. "Thor Delta B". Astronautix. Archived from the original on May 15, 2023. Retrieved May 31, 2023.
- ^ a b c d e Krebs, Gunter D. "Delta B". Gunter's Space Page. Archived from the original on January 30, 2023. Retrieved May 31, 2023.
- ^ a b Graham, William (September 13, 2018). "The evolution of Thor – Delta II prepares for swansong". NASASpaceflight.com. p. 2. Archived from the original on March 29, 2023. Retrieved May 31, 2023.
- ^ a b NASA, The First 25 Years: 1958 - 1983 (PDF) (Technical report). Washington, D.C.: NASA. 1983. p. 38. Archived (PDF) from the original on May 31, 2023. Retrieved May 31, 2023.
- ^ "Satellite Rocket Failure Ends Winning Streak". Corpus Christi Times. Cape Kennedy. Associated Press. March 19, 1964. p. 1. Archived from the original on May 31, 2023. Retrieved May 31, 2023 – via Newspapers.com.
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