Encyclopedia Astronautica
Thor Agena B SLV-2A/B


Thor Agena B upgraded with addition of three Castor 1 strap-on motors.

3 stage vehicle consisting of 3 x Castor 1 + 1 x Thor DSV-2C + 1 x Agena B

AKA: Thrust Augmented Thor; DSV-2C; SLV-2C.
Status: Retired 1966.
Gross mass: 67,500 kg (148,800 lb).
Payload: 400 kg (880 lb).
Height: 31.00 m (101.00 ft).
Diameter: 2.44 m (8.00 ft).
Thrust: 1,571.00 kN (353,174 lbf).
Apogee: 1,000 km (600 mi).
First Launch: 1963.06.29.
Last Launch: 1966.05.15.
Number: 2 .

More... - Chronology...


Associated Countries
Associated Spacecraft
  • Ferret American military naval signals reconnaisance satellite. 19 launches, 1962.02.21 (Ferret 1) to 1971.07.16 (OPS 8373). More...
  • Ferret American military naval signals reconnaisance satellite. 19 launches, 1962.02.21 (Ferret 1) to 1971.07.16 (OPS 8373). More...
  • Alouette Canadian earth magnetosphere satellite. 2 launches, 1962.09.29 (Alouette 1) and 1965.11.29 (Alouette 2). Ionospheric research. More...
  • Alouette Canadian earth magnetosphere satellite. 2 launches, 1962.09.29 (Alouette 1) and 1965.11.29 (Alouette 2). Ionospheric research. More...
  • Nimbus American earth weather satellite. 8 launches, 1964.08.28 (Nimbus 1) to 1978.10.13 (Nimbus 7). More...
  • Nimbus American earth weather satellite. 8 launches, 1964.08.28 (Nimbus 1) to 1978.10.13 (Nimbus 7). More...
  • DME American earth ionosphere satellite. One launch, 1965.11.29, Explorer 31. Explorer 31, the Direct Measurement Explorer, was launched with a Canadian Alouette II on November 28, 1965, on a Thor-Agena rocket from Vandenberg Air Force Base, California. More...
  • DME American earth ionosphere satellite. One launch, 1965.11.29, Explorer 31. Explorer 31, the Direct Measurement Explorer, was launched with a Canadian Alouette II on November 28, 1965, on a Thor-Agena rocket from Vandenberg Air Force Base, California. More...

Associated Engines
  • Bell 8081 Bell Nitric acid/UDMH rocket engine. 71.2 kN. Out of production. Isp=285s. Used on Agena B stage atop Thor and Atlas. First flight 1960. More...
  • M33-20-4 Thiokol solid rocket engine. 286 kN. Isp=247s. Used as apogee kick motor on Delta D, LT Thor Agena D, Scout X-1, Scout X-2, Scout X-3, Scout X-4, TA Thor Agena B, TA Thor Agena D. First flight 1960. More...
  • MB-3-3 Rocketdyne Lox/Kerosene rocket engine. 866.7 kN. Out of Production. License built in Japan for H-1. Isp=290s. First flight 1964. More...

See also
  • Delta The Delta launch vehicle was America's longest-lived, most reliable, and lowest-cost space launch vehicle. Development began in 1955 and it continued in service in the 21st Century despite numerous candidate replacements. More...
  • Delta The Delta launch vehicle was America's longest-lived, most reliable, and lowest-cost space launch vehicle. Development began in 1955 and it continued in service in the 21st Century despite numerous candidate replacements. More...

Associated Manufacturers and Agencies
  • Douglas American manufacturer of rockets, spacecraft, and rocket engines. Boeing Huntington Beach, Huntington Beach, CA, USA. More...
  • Douglas American manufacturer of rockets, spacecraft, and rocket engines. Boeing Huntington Beach, Huntington Beach, CA, USA. More...

Associated Launch Sites
  • Vandenberg Vandenberg Air Force Base is located on the Central Coast of California about 240 km northwest of Los Angeles. It is used for launches of unmanned government and commercial satellites into polar orbit and intercontinental ballistic missile test launches toward the Kwajalein Atoll. More...
  • Vandenberg Vandenberg Air Force Base is located on the Central Coast of California about 240 km northwest of Los Angeles. It is used for launches of unmanned government and commercial satellites into polar orbit and intercontinental ballistic missile test launches toward the Kwajalein Atoll. More...
  • Vandenberg SLC1E Delta launch complex. Originally a Thor 75 SMS launch pad. Upgraded to a space launch complex in 1967. More...
  • Vandenberg SLC2E Delta launch complex. Originally a Thor 75 SMS launch pad. Upgraded to a space launch complex in 1966. More...

Associated Stages
  • Agena B Nitric acid/UDMH propellant rocket stage. Loaded/empty mass 7,167/867 kg. Thrust 71.17 kN. Vacuum specific impulse 285 seconds. More...
  • Agena B Nitric acid/UDMH propellant rocket stage. Loaded/empty mass 7,167/867 kg. Thrust 71.17 kN. Vacuum specific impulse 285 seconds. More...
  • Castor 1 Solid propellant rocket stage. Loaded/empty mass 3,852/535 kg. Thrust 286.00 kN. Vacuum specific impulse 247 seconds. More...
  • Castor 1 Solid propellant rocket stage. Loaded/empty mass 3,852/535 kg. Thrust 286.00 kN. Vacuum specific impulse 247 seconds. More...
  • Delta Thor TA Lox/Kerosene propellant rocket stage. Loaded/empty mass 49,442/3,175 kg. Thrust 866.71 kN. Vacuum specific impulse 290 seconds. More...
  • Delta Thor TA Lox/Kerosene propellant rocket stage. Loaded/empty mass 49,442/3,175 kg. Thrust 866.71 kN. Vacuum specific impulse 290 seconds. More...

Thor Agena B SLV-2A/B Chronology


1963 June 29 - . 22:30 GMT - . Launch Site: Vandenberg. Launch Complex: Vandenberg SLC1E. LV Family: Delta. Launch Vehicle: Thor Agena B SLV-2A/B. LV Configuration: Thor SLV-2A Agena B 380 / Agena B 2314.
  • OPS 1440 - . Payload: Ferret 4 / Agena B 2314. Mass: 1,500 kg (3,300 lb). Nation: USA. Agency: USAF; CIA. Class: Military. Type: Military naval signals reconnaisance satellite. Spacecraft: Ferret. Decay Date: 1969-10-26 . USAF Sat Cat: 613 . COSPAR: 1963-027A. Apogee: 530 km (320 mi). Perigee: 487 km (302 mi). Inclination: 82.3000 deg. Period: 94.80 min.

1966 May 15 - . 07:55 GMT - . Launch Site: Vandenberg. Launch Complex: Vandenberg SLC2E. LV Family: Delta. Launch Vehicle: Thor Agena B SLV-2A/B. LV Configuration: Thor SLV-2A Agena B 456 (TA6) / Agena B S-01 6202 .
  • Nimbus 2 - . Payload: Nimbus C. Mass: 414 kg (912 lb). Nation: USA. Agency: NASA Greenbelt. Class: Earth. Type: Weather satellite. Spacecraft: Nimbus. USAF Sat Cat: 2173 . COSPAR: 1966-040A. Apogee: 1,176 km (730 mi). Perigee: 1,093 km (679 mi). Inclination: 100.3000 deg. Period: 108.00 min. TV, IR cloud cover photos. The spacecraft carried an advanced vidicon camera system for recording and storing remote cloud cover pictures, an automatic picture transmission camera for providing real-time cloudcover pictures, and both high- and medium-resolution infrared radiometers (HRIR and MRIR) for measuring the intensity and distribution of electromagnetic radiation emitted by and reflected from the earth and its atmosphere. The spacecraft and experiments performed normally after launch until July 26, 1966, when the spacecraft tape recorder failed. Its function was taken over by the HRIR tape recorder until November 15, 1966, when it also failed. Some real-time data were collected until January 17, 1969, when the spacecraft mission was terminated owing to deterioration of the horizon scanner used for earth reference.

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