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Atlas II
Part of Atlas Family
Atlas 2
Atlas 2
Atlas 2 - AC-102 - COSPAR 1991-083
American orbital launch vehicle. The Atlas II booster was 2.7-meters longer than an Atlas I and included uprated Rocketdyne MA-5A engines. The Atlas I vernier engines were replaced with a hydrazine roll control system. The Centaur stage was stretched 0.9-meters compared to the Centaur I stage. Fixed foam insulation replaced Atlas I's jettisonable insulation panels. The original Atlas II model was developed to support the United States Air Force Medium Launch Vehicle II program. Its Centaur used RL10A-3-3A engines operating at an increased mixture ratio. The first Atlas II flew on 7 December 1991, successfully delivering AC-102/Eutelsat II F3 to orbit.

Status: Retired 1998. First Launch: 1991-12-07. Last Launch: 1998-03-16. Number: 10 . Payload: 6,580 kg (14,500 lb). Thrust: 2,110.60 kN (474,482 lbf). Gross mass: 187,600 kg (413,500 lb). Height: 47.50 m (155.80 ft). Diameter: 3.05 m (10.00 ft). Apogee: 185 km (114 mi).

LEO Payload: 6,580 kg (14,500 lb) to a 185 km orbit at 28.50 degrees. Payload: 2,810 kg (6,190 lb) to a GTO. Launch Price $: 85.000 million in 1994 dollars.

Stage Data - Atlas II

  • Stage 0. 1 x Atlas MA-5A. Gross Mass: 4,187 kg (9,230 lb). Empty Mass: 4,187 kg (9,230 lb). Thrust (vac): 2,093.700 kN (470,682 lbf). Isp: 299 sec. Burn time: 172 sec. Isp(sl): 263 sec. Diameter: 4.90 m (16.00 ft). Span: 4.90 m (16.00 ft). Length: 0.0000 m ( ft). Propellants: Lox/Kerosene. No Engines: 2. Engine: RS-56-OBA. Status: In Production.
  • Stage 1. 1 x Atlas II. Gross Mass: 161,995 kg (357,137 lb). Empty Mass: 6,095 kg (13,437 lb). Thrust (vac): 386.300 kN (86,844 lbf). Isp: 316 sec. Burn time: 283 sec. Isp(sl): 220 sec. Diameter: 3.05 m (10.00 ft). Span: 3.05 m (10.00 ft). Length: 24.90 m (81.60 ft). Propellants: Lox/Kerosene. No Engines: 1. Engine: RS-56-OSA. Status: In Production.
  • Stage 2. 1 x Centaur II. Gross Mass: 18,833 kg (41,519 lb). Empty Mass: 2,053 kg (4,526 lb). Thrust (vac): 146.800 kN (33,002 lbf). Isp: 444 sec. Burn time: 488 sec. Isp(sl): 0.0000 sec. Diameter: 3.05 m (10.00 ft). Span: 3.05 m (10.00 ft). Length: 10.10 m (33.10 ft). Propellants: Lox/LH2. No Engines: 2. Engine: RL-10A-3A. Status: In Production.
  • Stage 3. 1 x IABS. Gross Mass: 1,578 kg (3,478 lb). Empty Mass: 275 kg (606 lb). Thrust (vac): 980 N (220 lbf). Isp: 312 sec. Burn time: 60 sec. Isp(sl): 0.0000 sec. Diameter: 2.90 m (9.50 ft). Span: 2.90 m (9.50 ft). Length: 0.68 m (2.23 ft). Propellants: N2O4/MMH. No Engines: 2. Engine: R-4D. Other designations: Integrated Apogee Boost Subsystem. Status: In Production.


More at: Atlas II.

Family: orbital launch vehicle. Country: USA. Engines: R-4D, RS-56-OBA, RS-56-OSA, RL-10A-3A. Spacecraft: UHF, Spacebus 100, DSCS III, HS 601. Projects: DSCS, Eutelsat. Launch Sites: Cape Canaveral, Cape Canaveral LC36A, Cape Canaveral LC36B. Stages: IABS, Atlas MA-5A, Atlas II stage, Centaur II. Agency: Convair.
Photo Gallery

Atlas IIIAtlas III
Atlas II Variants - Atlas IIA and IIAS
Credit: © Mark Wade


Atlas 2Atlas 2
Credit: © Mark Wade



1991 December 7 - . 22:47 GMT - . Launch Site: Cape Canaveral. Launch Complex: Cape Canaveral LC36B. LV Family: Atlas. Launch Vehicle: Atlas II.
  • Eutelsat II F3 - . Mass: 1,874 kg (4,131 lb). Nation: Europe. Agency: Eutelsat. Program: Eutelsat. Class: Communications. Type: Civilian communications satellite. Spacecraft: Spacebus 100. USAF Sat Cat: 21803 . COSPAR: 1991-083A. Apogee: 35,802 km (22,246 mi). Perigee: 35,769 km (22,225 mi). Inclination: 2.0000 deg. Period: 1,436.10 min.

    Stationed at 16 deg E. Telecommunications satellite. French registration 1991-8. Transfer orbit was 663 min, 200 x 36000 km x 7.0 deg. Registered by France in ST/SG/SER.E/249 until EUTELSAT can register the satellite. EUTELSAT is the European Telecommunications Satellite Organi zation. Launch vehicle put payload into supersynchronous earth orbit with IFR trajectory option. Positioned in geosynchronous orbit at 16 deg E in 1992-1998; 36 deg E in 1999. As of 1 September 2001 located at 21.51 deg E drifting at 0.017 deg E per day. As of 2007 Mar 11 located at 74.40E drifting at 3.531W degrees per day.


1992 February 11 - . 00:41 GMT - . Launch Site: Cape Canaveral. Launch Complex: Cape Canaveral LC36A. LV Family: Atlas. Launch Vehicle: Atlas II.
  • USA 78 - . Payload: DSCS III B-14. Mass: 2,613 kg (5,760 lb). Nation: USA. Agency: USAF. Program: DSCS. Class: Communications. Type: Military communications satellite. Spacecraft: DSCS III. USAF Sat Cat: 21873 . COSPAR: 1992-006A. Apogee: 35,503 km (22,060 mi). Perigee: 30,675 km (19,060 mi). Inclination: 0.9000 deg. Period: 1,300.50 min. Spacecraft engaged in research and exploration of the upper atmosphere or outer space (US Cat B). Launch vehicle put payload into geosynchronous transfer orbit with GCS trajectory option. Positioned in geosynchronous orbit; at 135 deg W in 1995..

1992 July 2 - . 21:54 GMT - . Launch Site: Cape Canaveral. Launch Complex: Cape Canaveral LC36A. LV Family: Atlas. Launch Vehicle: Atlas II.
  • USA 82 - . Payload: DSCS III B-12. Mass: 2,613 kg (5,760 lb). Nation: USA. Agency: USAF. Program: DSCS. Class: Communications. Type: Military communications satellite. Spacecraft: DSCS III. USAF Sat Cat: 22009 . COSPAR: 1992-037A. Apogee: 35,800 km (22,200 mi). Perigee: 35,775 km (22,229 mi). Inclination: 0.2000 deg. Period: 1,436.20 min.

    Launch vehicle put payload into geosynchronous transfer orbit with GCS trajectory option. Positioned in geosynchronous orbit at 12 deg W in 1995-1996. Spacecraft engaged in practical applications and uses of space technology such as weather or communication (US Cat C).


1993 July 19 - . 22:04 GMT - . Launch Site: Cape Canaveral. Launch Complex: Cape Canaveral LC36A. LV Family: Atlas. Launch Vehicle: Atlas II.
  • USA 93 - . Payload: DSCS III B-9. Mass: 2,615 kg (5,765 lb). Nation: USA. Agency: USAF. Program: DSCS. Class: Communications. Type: Military communications satellite. Spacecraft: DSCS III. USAF Sat Cat: 22719 . COSPAR: 1993-046A. Apogee: 35,764 km (22,222 mi). Perigee: 183 km (113 mi). Inclination: 26.1000 deg. Period: 625.80 min.

    Spacecraft engaged in practical applications and uses of space technology such as weather or communication (US Cat C). Launch vehicle put payload into geosynchronous transfer orbit with GCS trajectory option. Positioned in geosynchronous orbit at 175 deg E in 1995-1997.


1993 November 28 - . 23:40 GMT - . Launch Site: Cape Canaveral. Launch Complex: Cape Canaveral LC36A. LV Family: Atlas. Launch Vehicle: Atlas II.
  • USA 97 - . Payload: DSCS III B-10. Mass: 2,615 kg (5,765 lb). Nation: USA. Agency: USAF. Program: DSCS. Class: Communications. Type: Military communications satellite. Spacecraft: DSCS III. USAF Sat Cat: 22915 . COSPAR: 1993-074A. Apogee: 35,501 km (22,059 mi). Perigee: 195 km (121 mi). Inclination: 26.4000 deg. Period: 625.40 min.

    Launch vehicle put payload into geosynchronous transfer orbit with GCS trajectory option. Positioned in geosynchronous orbit at 52 deg W in 1995; 60 deg E in 1997. Spacecraft engaged in practical applications and uses of space technology such as weather or communication (US Cat C).


1995 January 29 - . 01:25 GMT - . Launch Site: Cape Canaveral. Launch Complex: Cape Canaveral LC36A. LV Family: Atlas. Launch Vehicle: Atlas II.
  • USA 108 - . Payload: UHF F/O F4. Mass: 3,023 kg (6,664 lb). Nation: USA. Agency: HCI. Program: UHF. Class: Communications. Type: Military communications satellite. Spacecraft: HS 601. USAF Sat Cat: 23467 . COSPAR: 1995-003A. Apogee: 35,799 km (22,244 mi). Perigee: 35,775 km (22,229 mi). Inclination: 2.2000 deg. Period: 1,436.10 min. UHF Follow-On #4; US Navy communications . Stationed at 177.0 deg W. Launch vehicle put payload into subsynchronous earth orbit with MRS trajectory option. Positioned in geosynchronous orbit at 177 deg W in 1995-1999..

1995 May 31 - . 15:27 GMT - . Launch Site: Cape Canaveral. Launch Complex: Cape Canaveral LC36A. LV Family: Atlas. Launch Vehicle: Atlas II.
  • USA 111 - . Payload: UHF F/O F5-EHF. Mass: 3,015 kg (6,646 lb). Nation: USA. Agency: USN. Program: UHF. Class: Communications. Type: Military communications satellite. Spacecraft: HS 601. USAF Sat Cat: 23589 . COSPAR: 1995-027A. Apogee: 35,796 km (22,242 mi). Perigee: 35,774 km (22,228 mi). Inclination: 4.8000 deg. Period: 1,436.10 min. UHF Follow-On #5; US Navy communications . Stationed at 72.3 deg E. Launch vehicle put payload into subsynchronous earth orbit with MRS trajectory option. Positioned in geosynchronous orbit at 72 deg E in 1995-1999..

1995 October 22 - . 08:00 GMT - . Launch Site: Cape Canaveral. Launch Complex: Cape Canaveral LC36A. LV Family: Atlas. Launch Vehicle: Atlas II.
  • USA 114 - . Payload: UHF F/O F6-EHF. Mass: 3,015 kg (6,646 lb). Nation: USA. Agency: USN. Program: UHF. Class: Communications. Type: Military communications satellite. Spacecraft: HS 601. USAF Sat Cat: 23696 . COSPAR: 1995-057A. Apogee: 35,797 km (22,243 mi). Perigee: 35,776 km (22,230 mi). Inclination: 5.0000 deg. Period: 1,436.10 min. UHF Follow-On #6; US Navy communications. Stationed at 105.3 deg W. Launch vehicle put payload into subsynchronous earth orbit with MRS trajectory option. Positioned in geosynchronous orbit at 105 deg W in 1995-1999..

1996 July 25 - . 12:42 GMT - . Launch Site: Cape Canaveral. Launch Complex: Cape Canaveral LC36A. LV Family: Atlas. Launch Vehicle: Atlas II.
  • USA 127 - . Payload: UHF F/O F7-EHF. Mass: 3,015 kg (6,646 lb). Nation: USA. Agency: HCI. Program: UHF. Class: Communications. Type: Military communications satellite. Spacecraft: HS 601. USAF Sat Cat: 23967 . COSPAR: 1996-042A. Apogee: 35,791 km (22,239 mi). Perigee: 35,784 km (22,235 mi). Inclination: 4.9000 deg. Period: 1,436.20 min. Positioned in geosynchronous orbit at 170 deg W in 1996; 23 deg W in 1996-1999; 100 deg W in 1999. As of 29 July 1999) 99.21 deg W drifting at 0.011 deg W per day. As of 2007 Feb 22 located at 21.85W drifting at 0.014W degrees per day..

1998 March 16 - . 21:32 GMT - . Launch Site: Cape Canaveral. Launch Complex: Cape Canaveral LC36A. Launch Pad: SLC36A. LV Family: Atlas. Launch Vehicle: Atlas II.
  • USA 138 - . Payload: UHF F/O F8-EHF. Mass: 3,206 kg (7,068 lb). Nation: USA. Agency: USN. Manufacturer: El Segundo. Program: UHF. Class: Communications. Type: Military communications satellite. Spacecraft: HS 601. USAF Sat Cat: 25258 . COSPAR: 1998-016A. Apogee: 35,803 km (22,246 mi). Perigee: 35,771 km (22,227 mi). Inclination: 3.3000 deg. Period: 1,436.10 min.

    UHF Follow-On F8 was the first Block III UHF Follow-On satellite, replacing the old FLTSATCOM satellites. It carried UHF, EHF and Ka-band transponders, including a video broadcast payload. This was the last Atlas II launch; future Atlas launches would use the Atlas IIA, IIAS and III models. Positioned in geosynchronous orbit at 172 deg E in 1998-1999.



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