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Soyuz 23

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Soyuz 23
Credit: © Mark Wade

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AKA: Radon (Radon). Launched: 1976-10-14. Returned: 1976-10-16. Number crew: 2 . Duration: 2.00 days.

The Soyuz 23 ferry spacecraft suffered a docking system failure. Sensors indicated an incorrect lateral velocity, causing unnecessary firing of the thrusters during rendezvous. The automatic system was turned off, but no fuel remained for a manual docking with the Salyut 5 space station. The capsule landed in Lake Tengiz in -20 deg C conditions in a snowstorm. The wet parachute filled and dragged the capsule below the surface, cooling the capsule. Heating systems had to be turned in the capsule to conserve battery power. Amphibious vehicles attempted to recover the spacecraft but could not reach it. Finally swimmers managed to attach a cable to a helicopter. The capsule was dragged for kilometers across the icy sea. Only in the morning was the crew able to emerge from the capsule. The recovery crews were surprised they were still alive.

• Soyuz 23 - . Call Sign: Radon (Radon ). Crew: Rozhdestvensky, Zudov. Backup Crew: Glazkov, Gorbatko. Support Crew: Berezovoi, Lisun. Payload: Soyuz 7K-T(A9) s/n 65. Mass: 6,760 kg (14,900 lb). Nation: Russia. Agency: MOM. Program: Almaz. Class: Manned. Type: Manned spacecraft. Flight: Soyuz 23. Spacecraft Bus: Soyuz. Spacecraft: Soyuz 7K-T/A9. Duration: 2.00 days. Decay Date: 1976-10-16 . USAF Sat Cat: 9477 . COSPAR: 1976-100A. Apogee: 269 km (167 mi). Perigee: 239 km (148 mi). Inclination: 51.60 deg. Period: 89.50 min.

  The Soyuz 23 ferry spacecraft suffered a docking system failure. Sensors indicated an incorrect lateral velocity, causing unnecessary firing of the thrusters during rendezvous. The automatic system was turned off, but no fuel remained for a manual docking by the crew.

• Landing of Soyuz 23 - . Return Crew: Rozhdestvensky, Zudov. Nation: Russia. Related Persons: Rozhdestvensky, Zudov. Program: Almaz. Flight: Soyuz 23.

  The capsule landed at 17:46 GMT in Lake Tengiz in -20 deg C conditions in a snowstorm. The wet parachute filled and dragged the capsule below the surface, cooling the capsule. Heating systems had to be turned off in the capsule to conserve battery power. Amphibious vehicles attempted to recover the spacecraft but could not reach it. Finally swimmers managed to attach a cable to a helicopter. The capsule was dragged for kilometres across the icy sea. Only in the morning was the crew able to emerge from the capsule. The recovery crews were surprised they were still alive.