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Castor & Pollux

Diamant BP4

National Center of Space Research

Launch Status


Castor & Pollux

Type: Earth Science

Dual French scientific satellites


The trajectory is unavailable. Check back for updates.


Diamant Launch Area

Kourou, French Guiana

317 rockets have launched from Kourou, French Guiana.

Diamant Launch Area, Kourou, French Guiana


Diamant BP4 – Société d’étude et de réalisation d’engins balistiques

  • Family: Diamant
  • Length: 21.6 m
  • Diameter: 1.34 m
  • Launch Mass: 18 T
  • Low Earth Orbit Capacity: 160 kg

The Diamant BP4 was manufactured by Société d’étude et de réalisation d’engins balistiques with the first launch on 1975-02-06. Diamant BP4 has 3 successful launches and 0 failed launches with a total of 3 launches. The Diamant rocket (Diamant is French for “diamond”) was the first exclusively French expendable launch system and at the same time the first satellite launcher not built by either the United States or USSR. As such, it has been referred to as being a key predecessor for all subsequent European launcher projects.


National Center of Space Research – CNES

  • Type: Government
  • Abbreviation: CNES
  • Administration: Jean-Yves Le Gall
  • Founded: 1961
  • Launchers: Ariane 5
  • Spacecraft: Mars/Venus Express | Rosetta
  • Country: FRA

The National Center of Space Research, or CNES, is a French National Agency in charge of France’s space program. In partnership with the US and Russia, they have put 10 people in space. CNES works in tandem with the larger ESA to develop the Ariane 5 and work on other probes and satellites. They are working with Germany to develop a cheaper and more efficient reusable rocket, which hopefully will be ready to fly by 2026.

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