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    ESA > Our Activities > Technology > Proba Missions

    Proba-3

    About Proba-3

    Beside being a world first from a technological point of view, the Proba-3 mission will open up space for smaller Member States and small- and medium sized businesses.

    Proba-3 is ESA’s – and the world’s – first precision formation flying mission. A pair of satellites will fly together maintaining a fixed configuration as a ‘large rigid structure’ in space to prove formation flying technologies.

    The mission will demonstrate formation flying in the context of a large-scale science experiment. The paired satellites will together form a 150-m long solar coronagraph to study the Sun’s faint corona closer to the solar rim than has ever before been achieved. Beside its scientific interest, the experiment will be a perfect instrument to measure the achievement of the precise positioning of the two spacecraft.

    Proba-3 facts and figures
    Launch date: 2017
    Mass: Coronagraph spacecraft 340 kg; Occulter spacecraft 200 kg
    Orbit: High Earth orbit, 19.7 hours orbital period, 60 530 km apogee, 600 km perigee
    Instrument: External coronagraph
    Ground station: Redu, Belgium

    Last update: 19 November 2012

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    • More information
      • About Proba-3
        • Mission
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              • Proba-3 fact sheet (English)
              • Related article
                • ESA’s Tigers on prowl for solar corona’s secrets

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