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| Istrebitel Sputnik - I2P ASAT. As far as is known follow-on models (IS-P, IS-MU) and the R-36-launched targets had a similar appearance. Credit: © Mark Wade. 10,593 bytes. 251 x 213 pixels. |
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Other Designations: IS. Article Number: 4Ya11. Manufacturer's Designation: IS-A. Class: Military. Type: ASAT. Nation: USSR. Manufacturer: OKB-52 / KBYu. Modernised ASAT. Tested in 1976-1978 and operational through the late 1980's.
SpecificationTotal Mass: 1,400 kg.
IS-A Chronology
16 March 1961
UR-200 (8K81) launch vehicle development authorised. Launch Vehicle: UR-200. An enabling decree was issued on 1 August 1961 by the Central Committee and Politburo. The UR-200 was designed not only to send a thermonuclear warhead over a range of 12,000 km, but also to orbit all of the Kosmoplan military variants: the IS ASAT; the US nuclear-powered naval intelligence satellite; and the Kosmoplan combat re-entry vehicle.
16 February 1976
Cosmos 804 Program: ASAT. Launch Site: Baikonur . Launch Vehicle: Tsyklon 2. Mass: 1,400 kg. Perigee: 160 km. Apogee: 702 km. Inclination: 65.1 deg. ASAT interceptor. After intercept with target deorbited using on-board engine.
13 April 1976
Cosmos 814 Program: ASAT. Launch Site: Baikonur . Launch Vehicle: Tsyklon 2. Mass: 1,400 kg. Perigee: 118 km. Apogee: 480 km. Inclination: 65.1 deg. ASAT interceptor. After intercept with target deorbited using on-board engine.
21 July 1976
Cosmos 843 Program: ASAT. Launch Site: Baikonur . Launch Vehicle: Tsyklon 2. Mass: 1,400 kg. Perigee: 132 km. Apogee: 346 km. Inclination: 65.1 deg. ASAT interceptor. Intercepted Cosmos 839. Deorbited after test.
28 December 1976
Cosmos 886 Program: ASAT. Launch Site: Baikonur . Launch Vehicle: Tsyklon 2. Mass: 1,400 kg. Perigee: 593 km. Apogee: 2,291 km. Inclination: 65.8 deg. ASAT interceptor. Intercepted and destroyed Cosmos 880 target.
23 May 1977
Cosmos 910 Program: ASAT. Launch Site: Baikonur . Launch Vehicle: Tsyklon 2. Mass: 1,400 kg. Perigee: 149 km. Apogee: 506 km. Inclination: 65.1 deg. ASAT interceptor. Failed to intercept Cosmos 909. Deorbited using on-board engine.
17 June 1977
Cosmos 918 Program: ASAT. Launch Site: Baikonur . Launch Vehicle: Tsyklon 2. Mass: 1,400 kg. Perigee: 125 km. Apogee: 197 km. Inclination: 65.1 deg. ASAT interceptor. Failed to intercept Cosmos 909. Deorbited using on-board engine.
26 October 1977
Cosmos 961 Program: ASAT. Launch Site: Baikonur . Launch Vehicle: Tsyklon 2. Mass: 1,400 kg. Perigee: 269 km. Apogee: 1,421 km. Inclination: 66.4 deg. ASAT interceptor. Succeeded in intercept of Cosmos 959. Deorbited using on-board engine.
21 December 1977
Cosmos 970 Program: ASAT. Launch Site: Baikonur . Launch Vehicle: Tsyklon 2. Mass: 1,400 kg. Perigee: 928 km. Apogee: 1,142 km. Inclination: 65.9 deg. ASAT interceptor. Intercepted Cosmos 970 target. Ordered to self-destruct following interception.
19 May 1978
Cosmos 1009 Program: ASAT. Launch Site: Baikonur . Launch Vehicle: Tsyklon 2. Mass: 1,400 kg. Perigee: 966 km. Apogee: 1,364 km. Inclination: 65.9 deg. ASAT interceptor. Succeeded in intercept of Cosmos 970. Deorbited using on-board engine.
18 April 1980
Cosmos 1174 Program: ASAT. Launch Site: Baikonur . Launch Vehicle: Tsyklon 2. Mass: 1,400 kg. Perigee: 372 km. Apogee: 1,419 km. Inclination: 66.1 deg. ASAT interceptor. First test of ASAT after extended storage. Missed Cosmos 1171 target by a large distance; over the two following days two more attempts were made with the backup engine, but all failed. On 20 April the satellite was ordered to self-destruct in orbit, ending the longest ASAT interceptor mission.
02 February 1981
Cosmos 1243 Program: ASAT. Launch Site: Baikonur . Launch Vehicle: Tsyklon 2. Mass: 1,400 kg. Perigee: 294 km. Apogee: 1,013 km. Inclination: 65.8 deg. ASAT interceptor. Approached within 50 m of target, but explosive charge did not go off as planned. Deorbited to destructive reentry in the atmosphere.
14 March 1981
Cosmos 1258 Program: ASAT. Launch Site: Baikonur . Launch Vehicle: Tsyklon 2. Mass: 1,400 kg. Perigee: 299 km. Apogee: 1,022 km. Inclination: 65.8 deg. ASAT interceptor. Failed to intercept Cosmos 1241 target. Deorbited to destructive reentry in the atmosphere.
18 June 1982
Cosmos 1379 Program: ASAT. Launch Site: Baikonur . Launch Vehicle: Tsyklon 2. Mass: 1,400 kg. Perigee: 144 km. Apogee: 546 km. Inclination: 65.1 deg. ASAT interceptor. Succeeded in intercept of Cosmos 1375 target. Deorbited using on-board engine. Final test of series.
Bibliography:- 102 - Voevodin, Sergey A, VSA072 - Space Apparatus, "Sergey A. Voevodin's Reports", . HTML when accessed: http://www.mcs.net/~rusaerog/sergeyv/VSA.html
- 272 - Zheleznyakov, Aleksandr, Istoriya Rossiyskoi Sovetskoi Kosmonavtiki, "Istrebitel Sputnikov", Aleksandr Krasnikov Web Page, 1998. HTML when accessed: http://www.aha.ru/~kai/spaceflt/projects/istr.html
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Last update 12 March 2001.
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© Mark Wade, 2001 .