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The scientific mission of this spacecraft was to detect the probable presence of hydrogen in several directions of the celestial sphere. Scientific and technological data recorded by an onboard recorder were transmitted on command. The satellite was a cylinder 70 cm in diameter and 80 cm long. The rotating axis was directed parallel to the sun-satellite axis, with an accuracy of about 10-20 min of arc. The spin rate was 1 rpm.

Alternate Names

  • D2A
  • Diamant-B No 3
  • 05128

Facts in Brief

Launch Date: 1971-04-15
Launch Vehicle: Diamant
Launch Site: Kourou, French Guiana
Mass: 96 kg

Funding Agency

  • Unknown (France)


  • Astronomy

Additional Information

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

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