Encyclopedia Astronautica
Titan 402A/IUS


American orbital launch vehicle. Version of Titan 4 with IUS upper stages.

Gross mass: 910,000 kg (2,000,000 lb).
Height: 54.00 m (177.00 ft).
Diameter: 3.05 m (10.00 ft).
Thrust: 14,200.00 kN (3,192,200 lbf).
Apogee: 40,000 km (24,000 mi).
First Launch: 1989.06.14.
Last Launch: 1994.12.22.
Number: 3 .

More... - Chronology...


Associated Countries
Associated Spacecraft
  • DSP American military early warning satellite. 23 launches, 1970.11.06 (IMEWS 1) to 2007.11.11 (USA 176). An evolving series of satellites built by the United States to detect intercontinental ballistic missiles on launch. More...

See also
  • Titan The Titan launch vehicle family was developed by the United States Air Force to meet its medium lift requirements in the 1960's. The designs finally put into production were derived from the Titan II ICBM. Titan outlived the competing NASA Saturn I launch vehicle and the Space Shuttle for military launches. It was finally replaced by the USAF's EELV boosters, the Atlas V and Delta IV. Although conceived as a low-cost, quick-reaction system, Titan was not successful as a commercial launch vehicle. Air Force requirements growth over the years drove its costs up - the Ariane using similar technology provided lower-cost access to space. More...

Associated Manufacturers and Agencies
  • Martin American manufacturer of rockets, spacecraft, and rocket engines. Martin Marietta Astronautics Group (1956), Denver, CO, USA. More...

Associated Launch Sites
  • Cape Canaveral America's largest launch center, used for all manned launches. Today only six of the 40 launch complexes built here remain in use. Located at or near Cape Canaveral are the Kennedy Space Center on Merritt Island, used by NASA for Saturn V and Space Shuttle launches; Patrick AFB on Cape Canaveral itself, operated the US Department of Defense and handling most other launches; the commercial Spaceport Florida; the air-launched launch vehicle and missile Drop Zone off Mayport, Florida, located at 29.00 N 79.00 W, and an offshore submarine-launched ballistic missile launch area. All of these take advantage of the extensive down-range tracking facilities that once extended from the Cape, through the Caribbean, South Atlantic, and to South Africa and the Indian Ocean. More...
  • Cape Canaveral LC40 Titan launch complex. Constructed as part of the Titan Integrate-Transfer-Launch (ITL) facility at the north end of Cape Canaveral in the early 1960s. Supported a wide variety of military space missions involving Titan IIIC, Titan 34D and Titan IV vehicles. More...
  • Cape Canaveral LC41 Titan, Atlas V launch complex. Complexes 40 and 41 were constructed as part of the Integrate-Transfer-Launch (ITL) Titan launch facility at the north end of Cape Canaveral in the early 1960s. Over the next three decades, the complexes supported a wide variety of military space missions involving Titan IIIC, Titan 34D and Titan IV. Complex 41 was deactivated at the end of 1977, then upgraded for the Titan IV program in the 1986-88 period. In October 1999, Complex 41 was demolished with high explosives in order for a new pad for launch of the Atlas 5 rocket to be erected. By then it had been the starting point for 27 Titan flights. More...

Associated Stages
  • IUS-2 Solid propellant rocket stage. Loaded/empty mass 3,919/1,170 kg. Thrust 78.41 kN. Vacuum specific impulse 304 seconds. More...
  • Titan 4-1 N2O4/Aerozine-50 propellant rocket stage. Loaded/empty mass 163,000/8,000 kg. Thrust 2,428.31 kN. Vacuum specific impulse 302 seconds. More...
  • Titan 4-2 N2O4/Aerozine-50 propellant rocket stage. Loaded/empty mass 39,500/4,500 kg. Thrust 459.51 kN. Vacuum specific impulse 316 seconds. More...
  • Titan UA1207 Solid propellant rocket stage. Loaded/empty mass 319,330/51,230 kg. Thrust 7,117.00 kN. Vacuum specific impulse 272 seconds. More...
  • TOS Solid propellant rocket stage. Loaded/empty mass 10,960/1,130 kg. Thrust 185.10 kN. Vacuum specific impulse 296 seconds. IUS-2 stage with simplified electronics. More...

Titan 402A/IUS Chronology


1989 June 14 - . 13:18 GMT - . Launch Site: Cape Canaveral. Launch Complex: Cape Canaveral LC41. LV Family: Titan. Launch Vehicle: Titan 402A/IUS. LV Configuration: Titan 402A/IUS K-1 (45D-1).
  • USA 39 - . Payload: DSP-1 Block 14 F14. Mass: 2,360 kg (5,200 lb). Nation: USA. Agency: USAF. Class: Military. Type: Early warning satellite. Spacecraft: DSP. USAF Sat Cat: 20066 . COSPAR: 1989-046A. Apogee: 35,614 km (22,129 mi). Perigee: 35,699 km (22,182 mi). Inclination: 3.1000 deg. Period: 1,421.80 min. First DSP-1 Block 14 ballistic missile launch detection satellite; first Titan 4 launch. Positioned in geosynchronous orbit at 165 deg W in 1990-1994; 145 deg W in 1999; 166 deg W in 2000.. Still in service as of March 2007. As of 2007 Feb 5 located at 145.23W drifting at 0.014W degrees per day.

1990 November 13 - . 00:37 GMT - . Launch Site: Cape Canaveral. Launch Complex: Cape Canaveral LC41. LV Family: Titan. Launch Vehicle: Titan 402A/IUS. LV Configuration: Titan 402A/IUS K-6 (45D-2).
  • USA 65 - . Payload: DSP-1 Block 14 F15. Mass: 2,360 kg (5,200 lb). Nation: USA. Agency: USAF. Class: Military. Type: Early warning satellite. Spacecraft: DSP. Completed Operations Date: 2006-01-01 . USAF Sat Cat: 20929 . COSPAR: 1990-095A. Apogee: 35,699 km (22,182 mi). Perigee: 35,614 km (22,129 mi). Inclination: 3.1000 deg. Period: 1,421.80 min. Summary: DSP-1 Block 14 ballistic missile launch detection satellite. Positioned in geosynchronous orbit at 105 deg E in 1991; 70 deg E in 1991-1992; 5 deg E in 1992-1993; 35 deg W in 1993; 38 deg W in 1999-2004. Believed to have been taken out of service in 2006..

1994 December 22 - . 22:19 GMT - . Launch Site: Cape Canaveral. Launch Complex: Cape Canaveral LC40. LV Family: Titan. Launch Vehicle: Titan 402A/IUS. LV Configuration: Titan 402A/IUS K-14 (45D-3).
  • USA 107 - . Payload: DSP-1 Block 14 F17. Mass: 2,360 kg (5,200 lb). Nation: USA. Agency: USAF. Class: Military. Type: Early warning satellite. Spacecraft: DSP. USAF Sat Cat: 23435 . COSPAR: 1994-084A. Apogee: 35,790 km (22,230 mi). Perigee: 35,780 km (22,230 mi). Inclination: 0.0000 deg. Period: 1,436.10 min. Summary: DSP-1 Block 14 ballistic missile launch detection satellite. Positioned in geosynchronous orbit at 103 deg E in 1999. Still in service as of March 2007..

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