N-4 Spacecraft Credit - Chelomei School, Leninsk

Cosmic ray measurements. Study of the nature of high and ultra-high energy cosmic rays and their interaction with atomic nuclei. Mass announced at time of launch 17,000 kg. Scientific payload 12,500 kg; operated for 100 days in orbit.

Typical orbit: 248 km x 477 km at 52 degrees inclination. Span: 4.10 m (13.40 ft). Mass: 16,000 kg (35,000 lb). Payload: 12,500 kg (27,500 lb). Associated Launch Vehicle: Proton 8K82K.

• 1968 November 16 - Proton 4 - Program: Proton. Launch Site: Baikonur. Launch Vehicle: Proton 8K82K. Mass: 16,000 kg (35,000 lb). Perigee: 248 km (154 mi). Apogee: 477 km (296 mi). Inclination: 51.60 deg. Period: 91.80 min.

  First launch of the Proton three-stage variant. The satellite studied the nature of high and ultra-high energy cosmic rays and their interaction with atomic nuclei. Scientific payload 12,500 kg; operated for 100 days in orbit.

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