Orbital mechanics

ORB ORB - Orbital mechanics
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The COMmunity of ExperTs in ORBital mechanics deals with all subjects relating to space vehicle trajectories.

This community aims to lead and prompt discussions on all aspects of the life of these vehicles (from launch to re-entry), from the most theoretical aspects to the most practical aspects.

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  • Fabien Gachet Fabien Gachet
    Co-chair COMET-ORB / Flight Dynamics Engineer
  • Slim LOCOCHE
    Co-chair COMET-ORB / Mission Analysis and Flight Dynamics expert

The bureau

Space Agencies

Public Research (laboratories, Instituts, Higher School, ...)

Industrial Prime Contractor

SSII and algorithms companies

  • 11 March 2025
    from 14H00 to 15H30
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    The JUICE Lunar-Earth Gravity Assist: from Inception to Completion

    ORB - Orbital mechanics
    In August 2024, the JUICE spacecraft performed a very special manoeuvre: the first-ever Lunar-Earth gravity assist (LEGA) manoeuvre. The concept was invented at ESOC in Summer 2013. In a first phase, the potential of the concept was analysed in detail by mission analysis, and its navigability was carefully studied to ultimately include it in the JUICE baseline. Once in flight, the key was accuracy and safety. These aspects were successfully handled by the ...
    • Accessible by videoconference
    • Public
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  • 21 January 2025
    from 09H00 to 16H00
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    GNSS Satellites Orbit Determination Improvements and Applications

    ORB - Orbital mechanics
    Agenda Horaire Timing Titre Orateur(s) Organisme 9:00 30 min Accueil     9:30 30 min Introduction to GNSS positioning methods  Marie ANSART Thalès 10:00 30 min Besoin en précision de restitution ET remontée de besoins pour le GNSS lui-même (AC) Clément GAZZINO CNES 10:30 20 min Pause     10:50 40 min Moonlight Lunar Communications and Navigation Services – E2E Navigation Chain Overview Cosimo STALLO ESA 11:30 30 min   Flavien MERCIER CNES 12:00 120 min Déjeuner     14:00 30 min Composite timescales and clock modelling for precise orbit determination of GNSS satellites Pedro ROLDAN GOMEZ Thalès 14:30 30 min Inter-Satellite Links : IMPROVING GNSS NAVIGATION MESSAGE PERFORMANCE Pierre GUERIN Thalès 15:00 20 min Pause     15:20 30 min ESA Genesis Guilhem MOREAUX CLS 15:50 10 min Conclusion       Abstracts Introduction to GNSS positioning ...
    • Artilect, TOULOUSE, France
    • EN
    • Accessible by videoconference
    • Public
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  • 15 November 2024
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    Mission Analysis for Close Proximity Operations

    ORB - Orbital mechanics
    In-orbit servicing is rapidly developing for various applications: inspection, life extension, ergols filling, deorbitation, etc… This “new” field attracts the industrial prime contractors together with startups, with the support of the agencies. This seminar aims at gathering most of the European players to present the latest results of research, missions under development and return of experience, specifically for astrodynamics; it will also be the opportunity to favour exchange to improve the best ...
    • EN
    • Accessible by videoconference
    • Public
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