Encyclopedia Astronautica
Atlas V 431

American orbital launch vehicle. Atlas V with 4-m diameter payload fairing, single engine Centaur upper stage, and three strap-on solid boosters. Payloads: 11,547 kg (25,458 lb) to sun synchronous orbit; 7,800 kg (17,196 lb) to geosynchronous transfer orbit.

Status: Active.
Gross mass: 482,500 kg (1,063,700 lb).
Payload: 11,547 kg (25,456 lb).
Height: 59.10 m (193.80 ft).
Diameter: 3.81 m (12.49 ft).
Span: 6.91 m (22.67 ft).
Thrust: 7,910.00 kN (1,778,230 lbf).
First Launch: 2005.03.11.
Last Launch: 2009.11.23.
Number: 2 .

More... - Chronology...

Associated Countries
Associated Spacecraft
  • FS-1300 American communications satellite bus. Operational, first launch 1989.06.05. More...
  • Eurostar 3000 French communications satellite bus. Operational, first launch 2005.03.11 (Inmarsat 4-F1). Third generation of Matra Marconi Space GEO satellite platforms serving mainly commercial telecommunications applications. More...

See also
  • Atlas V The Atlas V launch vehicle system was a completely new design that succeeded the earlier Atlas series. Atlas V vehicles were based on the 3.8-m (12.5-ft) diameter Common Core Booster (CCB) powered by a single Russian RD-180 engine. These could be clustered together, and complemented by a Centaur upper stage, and up to five solid rocket boosters, to achieve a wide range of performance. More...

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

Associated Programs
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 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
  • Atlas CCB Lox/Kerosene propellant rocket stage. Loaded/empty mass 306,914/22,461 kg. Thrust 4,152.00 kN. Vacuum specific impulse 338 seconds. Common Core Booster uses Glushko RD-180 engine and new isogrid tanks. Used in Atlas IV/USAF EELV, Atlas V. Includes 272 kg booster interstage adapter and 1297 kg Centaur interstage adapter. More...
  • Atlas V SRB Solid propellant rocket stage. Loaded/empty mass 40,824/4,000 kg. Thrust 1,270.00 kN. Vacuum specific impulse 275 seconds. New SRB boosters in development for Atlas V. Empty mass, vacuum thrust, sea level Isp estimated. More...
  • Centaur V1 Lox/LH2 propellant rocket stage. Loaded/empty mass 22,825/2,026 kg. Thrust 99.19 kN. Vacuum specific impulse 451 seconds. Single-engine Centaur for Atlas V. Centaur is powered by either one or two Pratt & Whitney RL10A-4-2 turbopump-fed engines burning liquid oxygen and liquid hydrogen. For typical, high-energy mission applications, Centaur will be configured with one RL10 engine. Guidance, tank pressurization, and propellant usage controls for both Atlas and Centaur phases are provided by the inertial navigation unit (INU) located on the Centaur forward equipment module. More...

Atlas V 431 Chronology

2005 March 11 - . 21:42 GMT - . Launch Site: Cape Canaveral. Launch Complex: Cape Canaveral LC41. Launch Pad: SLC41. LV Family: Atlas V. Launch Vehicle: Atlas V 431. LV Configuration: Atlas V 431 AV-004.
  • Inmarsat 4-F1 - . Payload: Inmarsat 4A / Eurostar 3000GM. Mass: 5,959 kg (13,137 lb). Nation: International. Agency: Inmarsat. Manufacturer: EADS Astrium. Program: Inmarsat. Class: Communications. Type: Civilian communications satellite. Spacecraft: Eurostar 3000. USAF Sat Cat: 28628 . COSPAR: 2005-009A. Apogee: 36,011 km (22,376 mi). Perigee: 35,562 km (22,097 mi). Inclination: 3.0000 deg. Period: 1,436.10 min. Heaviest single payload to geosynchronous transfer orbit to that date. Delayed from October 2004, February 27, March 10, 2005. The satellite was to provide L-band mobile communications and wideband data transmission for Inmarsat's global network. As of 2007 Mar 11 located at 63.82E drifting at 0.000E degrees per day.

2009 November 23 - . 06:55 GMT - . Launch Site: Cape Canaveral. Launch Complex: Cape Canaveral LC41. Launch Pad: SLC41. LV Family: Atlas V. Launch Vehicle: Atlas V 431. LV Configuration: Atlas V 431 s/n AV024.
  • Intelsat IS-14 - . Mass: 5,663 kg (12,484 lb). Nation: USA. Agency: Martin. Program: Intelsat. Spacecraft: FS-1300. USAF Sat Cat: 36097 . COSPAR: 2009-064A. Apogee: 35,800 km (22,200 mi). Perigee: 35,775 km (22,229 mi). Inclination: 0.0000 deg. Period: 1,436.10 min. Communications satellite to replace IS-1R at 24 deg W over the Atlantic. The Centaur AV-024 upper stage maneuvered and then released the satellite into a 6157 km x 39094 km x 22.5 deg geosynchronous transfer orbit at 08:53 GMT. IS-14 then used its own propulsion to reach its operational orbit. Mass 2517 kg unfuelled.

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