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Progress M-42



An improved version of cargo freighters used to supply the Mir space station, the Progress M series had greater cargo capacity, a modernized approach/docking system and carried 2 solar panels to generate electrical power. Progress M can fly for 30 days independently and 108 days docked with Mir. Spare propellent in Progress M's tanks can be transferred to Mir before it is consigned to burn up in reentry. In the past, extra fuel was abandoned with the craft. Future Progress vehicles will carry a recoverable reentry capsule for the speedy return of up to 150 kg of material from Mir to earth.

Progress M-42 was launched from Baikonur by a Soyuz-U rocket at 16:37 UT. It was launched after resolution of a dispute with Kazakhstan arising out of the crash of a Proton-K rocket on 5 July 1999. It docked with Mir on 18 July at 21:56 UT. Among the delivered supplies were equipment to operate the station unmanned, and to prepare for a controlled re-entry, probably by March 2000, unless financial and political resources would enable its continued operation.

Alternate Names

  • 25858
  • ProgressM-42

Facts in Brief

Launch Date: 1999-07-16
Launch Vehicle: Soyuz-U
Launch Site: Tyuratam (Baikonur Cosmodrome), Kazakhstan

Funding Agency

  • Unknown (Russia)


  • Resupply/Refurbishment/Repair

Additional Information

Questions and comments about this spacecraft can be directed to: Coordinated Request and User Support Office

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