AKA: Priborniy otsek. Status: Study 1965. Thrust: 15.83 kN (3,558 lbf). Gross mass: 2,300 kg (5,000 lb). Unfuelled mass: 2,025 kg (4,464 lb). Specific impulse: 266 s. Height: 2.25 m (7.38 ft). Diameter: 2.43 m (7.97 ft).
Spacecraft delta v: 155 m/s (508 ft/sec). Electric System: 24.00 kWh. Electric System: 0.20 average kW.