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Yantar-4K2M (Kobalt-M, 11F695M)

Yantar-4K2 (Kobalt)
(Yantar-4K2M (Kobalt-M) similar)

The Russian Yantar-4K2M or Kobalt-M series is the final development of the film-return variant of the Yantar reconnaissance satellite series.

These satellites were developed by TsSKB Progress, Samara, and were built at OAO Arsenal, St Petersburg. Like their Yantar-4K2 (Kobalt) predecessors, they consisted of a service module with reignitable propulsion and two solar arrays, a large conical reentry vehicle with the camera and two small spherical reentry vehicles (SpK, Spuskayemaya Kapsula). The launch mass was about 6700 kg. The orbital life time was up to 130 days. Reportedly the ground resolution was about 0.3 m.

The satellites were launched by Soyuz-U from Plesetsk, typically into a 170 km by 370 km orbit with inclinations between 62.8 and 67.2. For the last two launches the launch vehicle was replaced by a Soyuz-2-1a, as the former Soyuz-U could no longer be launched from Plesetsk. The satellite could maneuver to inspect areas of interest. Film was returned in the two small capsules and at the end of the mission in the main capsule. The typical landing area was near Orenburg. Mission durations were from 76 to 130 days. The return capsules could be reused up to three times.

The Kobalt-M series was phased out in 2015, with the electro-optical Persona satellites taking over. The last two were apparently held in reserve as a back-up against problems with the Persona satellite.

Nation: USSR / Russia
Type / Application: Reconnaissance, photo (film return type)
Operator: GRU
Contractors: TsSKB-Progress
Configuration: Yantar Bus, main reentry module, 2 small reentry capsules
Power: 2 deployable solar arrays, batteries
Lifetime: 130 days
Mass: ~ 6700 kg
Orbit: 170 km × 370 km, 62.8 - 67.2
Satellite COSPAR Date LS Launch Vehicle Remarks
Kosmos 2410 (Yantar-4K2M #1, Kobalt-M #1) 2004-038A 24.09.2004 Pl LC-16/2 Soyuz-U
Kosmos 2420 (Yantar-4K2M #2, Kobalt-M #2) 2006-017A 03.05.2006 Pl LC-16/2 Soyuz-U
Kosmos 2427 (Yantar-4K2M #3, Kobalt-M #3) 2007-022A 07.06.2007 Pl LC-16/2 Soyuz-U
Kosmos 2445 (Yantar-4K2M #4, Kobalt-M #4) 2008-058A 14.11.2008 Pl LC-16/2 Soyuz-U
Kosmos 2450 (Yantar-4K2M #5, Kobalt-M #5) 2009-022A 29.04.2009 Pl LC-16/2 Soyuz-U
Kosmos 2462 (Yantar-4K2M #6, Kobalt-M #6) 2010-014A 16.04.2010 Pl LC-16/2 Soyuz-U
Kosmos 2472 (Yantar-4K2M #7, Kobalt-M #7) 2011-028A 27.06.2011 Pl LC-16/2 Soyuz-U
Kosmos 2480 (Yantar-4K2M #8, Kobalt-M #8) 2012-024A 17.05.2012 Pl LC-16/2 Soyuz-U
Kosmos 2495 (Yantar-4K2M #9, Kobalt-M #9) 2014-025A 06.05.2014 Pl LC-43/4 Soyuz-2-1a
Kosmos 2505 (Yantar-4K2M #10, Kobalt-M #10) 2015-027A 05.06.2015 Pl LC-43/4 Soyuz-2-1a


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