Encyclopedia Astronautica
Thor Burner 2A


American orbital launch vehicle. Three stage vehicle consisting of 1 x Thor DM-18A + 1 x Star 37B + 1 x Star 26B

Failures: 1. First Fail Date: 1976-02-19. Last Fail Date: 1976-02-19.

Status: Retired 1976.
Gross mass: 50,000 kg (110,000 lb).
Height: 23.00 m (75.00 ft).
Diameter: 2.44 m (8.00 ft).
Thrust: 750.00 kN (168,600 lbf).
Apogee: 1,000 km (600 mi).
First Launch: 1971.10.14.
Last Launch: 1976.02.19.
Number: 8 .

More... - Chronology...


Associated Countries
Associated Spacecraft
  • DMSP Block 5B American earth weather satellite. 5 launches, 1971.10.14 (DMSP-Block-5B F1) to 1974.03.16 (DMSP-Block-5B F5). Defense Meteorological Satellite Program. More...
  • DMSP Block 5C American earth weather satellite. 3 launches, 1974.08.09 (DMSP-Block-5C F1) to 1976.02.19 (DMSP-Block-5C F3). Defense Meteorological Satellite Program. 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...

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

Associated Programs
  • DMSP The first CORONA photos in August 1960 convinced authorities that knowledge of cloud cover over Russia was necessary and could be obtained only via satellite. Since the civilian TIROS program could not yet meet the requirement, the Director, National Reconnaissance Office authorized an 'interim' effort - the Defense Meteorological Satellite Program. The satellite series continued to be updated and served into the 21st Century. 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 SLC10W Delta launch complex. Originally a Thor 75 SMS launch pad. Upgraded to a launch emplacement in 1965. More...

Associated Stages
  • Star 26B Solid rocket stage. 34.63 kN (7,784 lbf) thrust. Mass 261 kg (575 lb). More...
  • Star 37B Solid rocket stage. 45.00 kN (10,116 lbf) thrust. Mass 718 kg (1,583 lb). More...
  • Thor DM-19 Lox/Kerosene propellant rocket stage. Loaded/empty mass 49,340/3,125 kg. Thrust 758.71 kN. Vacuum specific impulse 282 seconds. More...

Thor Burner 2A Chronology


1971 October 14 - . 07:51 GMT - . Launch Site: Vandenberg. Launch Complex: Vandenberg SLC10W. LV Family: Delta. Launch Vehicle: Thor Burner 2A. LV Configuration: Thor Burner 2A 159.
  • DMSP-Block-5B F1 - . Payload: DMSP 4527 / OPS 4311. Mass: 195 kg (429 lb). Nation: USA. Agency: USAF. Program: DMSP. Class: Earth. Type: Weather satellite. Spacecraft: DMSP Block 5B. USAF Sat Cat: 5557 . COSPAR: 1971-087A. Apogee: 850 km (520 mi). Perigee: 772 km (479 mi). Inclination: 99.1000 deg. Period: 101.10 min. Summary: Defense Meteorological Satellite Program..

1972 March 24 - . 08:46 GMT - . Launch Site: Vandenberg. Launch Complex: Vandenberg SLC10W. LV Family: Delta. Launch Vehicle: Thor Burner 2A. LV Configuration: Thor Burner 2A 153.
  • DMSP-Block-5B F2 - . Payload: DMSP 5528 / OPS 5058. Mass: 195 kg (429 lb). Nation: USA. Agency: USAF. Program: DMSP. Class: Earth. Type: Weather satellite. Spacecraft: DMSP Block 5B. USAF Sat Cat: 5903 . COSPAR: 1972-018A. Apogee: 858 km (533 mi). Perigee: 781 km (485 mi). Inclination: 98.9000 deg. Period: 101.30 min. Summary: Defense Meteorological Satellite Program..

1972 November 9 - . 03:23 GMT - . Launch Site: Vandenberg. Launch Complex: Vandenberg SLC10W. LV Family: Delta. Launch Vehicle: Thor Burner 2A. LV Configuration: Thor Burner 2A 294.
  • DMSP-Block-5B F3 - . Payload: DMSP 6530 / OPS 7323. Mass: 195 kg (429 lb). Nation: USA. Agency: USAF. Program: DMSP. Class: Earth. Type: Weather satellite. Spacecraft: DMSP Block 5B. USAF Sat Cat: 6275 . COSPAR: 1972-089A. Apogee: 841 km (522 mi). Perigee: 785 km (487 mi). Inclination: 98.6000 deg. Period: 101.10 min. Summary: Defense Meteorological Satellite Program..

1973 August 17 - . 04:49 GMT - . Launch Site: Vandenberg. Launch Complex: Vandenberg SLC10W. LV Family: Delta. Launch Vehicle: Thor Burner 2A. LV Configuration: Thor Burner 2A 291.
  • DMSP-Block-5B F4 - . Payload: DMSP 7529 / OPS 8364. Mass: 195 kg (429 lb). Nation: USA. Agency: USAF. Program: DMSP. Class: Earth. Type: Weather satellite. Spacecraft: DMSP Block 5B. USAF Sat Cat: 6787 . COSPAR: 1973-054A. Apogee: 819 km (508 mi). Perigee: 779 km (484 mi). Inclination: 98.9000 deg. Period: 100.90 min. Summary: Defense Meteorological Satellite Program..

1974 March 16 - . 08:00 GMT - . Launch Site: Vandenberg. Launch Complex: Vandenberg SLC10W. LV Family: Delta. Launch Vehicle: Thor Burner 2A. LV Configuration: Thor Burner 2A 207.
  • DMSP-Block-5B F5 - . Payload: DMSP 8531 / OPS 8579. Mass: 195 kg (429 lb). Nation: USA. Agency: USAF. Program: DMSP. Class: Earth. Type: Weather satellite. Spacecraft: DMSP Block 5B. USAF Sat Cat: 7218 . COSPAR: 1974-015A. Apogee: 846 km (525 mi). Perigee: 757 km (470 mi). Inclination: 99.1000 deg. Period: 100.90 min. Summary: Defense Meteorological Satellite Program..

1974 August 9 - . 03:22 GMT - . Launch Site: Vandenberg. Launch Complex: Vandenberg SLC10W. LV Family: Delta. Launch Vehicle: Thor Burner 2A. LV Configuration: Thor Burner 2A 275.
  • DMSP-Block-5C F1 - . Payload: DMSP 9532 / OPS 6983. Mass: 195 kg (429 lb). Nation: USA. Agency: USAF. Program: DMSP. Class: Earth. Type: Weather satellite. Spacecraft: DMSP Block 5C. USAF Sat Cat: 7411 . COSPAR: 1974-063A. Apogee: 844 km (524 mi). Perigee: 779 km (484 mi). Inclination: 98.8000 deg. Period: 101.10 min. Summary: Defense Meteorological Satellite Program..

1975 May 24 - . 03:22 GMT - . Launch Site: Vandenberg. Launch Complex: Vandenberg SLC10W. LV Family: Delta. Launch Vehicle: Thor Burner 2A. LV Configuration: Thor Burner 2A 197.
  • DMSP-Block-5C F2 - . Payload: DMSP 10533 / OPS 6226. Mass: 194 kg (427 lb). Nation: USA. Agency: USAF. Program: DMSP. Class: Earth. Type: Weather satellite. Spacecraft: DMSP Block 5C. USAF Sat Cat: 7816 . COSPAR: 1975-043A. Apogee: 880 km (540 mi). Perigee: 794 km (493 mi). Inclination: 98.7000 deg. Period: 101.70 min. Summary: Defense Meteorological Satellite Program..

1976 February 19 - . 07:52 GMT - . Launch Site: Vandenberg. Launch Complex: Vandenberg SLC10W. LV Family: Delta. Launch Vehicle: Thor Burner 2A. LV Configuration: Thor Burner 2A 182. FAILURE: Early booster cut-off due to incorrect calculation of the Thor fuel load.. Failed Stage: G.
  • DMSP-Block-5C F3 - . Payload: DMSP 11534/Star 26B S/N 009 / OPS 5140. Mass: 175 kg (385 lb). Nation: USA. Agency: USAF. Program: DMSP. Class: Earth. Type: Weather satellite. Spacecraft: DMSP Block 5C. Decay Date: 1976-02-19 . USAF Sat Cat: 8696 . COSPAR: 1976-016A. Apogee: 361 km (224 mi). Perigee: 89 km (55 mi). Inclination: 98.9000 deg. Period: 88.90 min. Summary: Defense Meteorological Satellite Program; unusable orbit. Last of the Thor Burner missions..

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