A displaced non-KeplerianNon-Keplerian orbits \b orbit is a trajectory whose orbital plane does not contain the center of mass of the primary body, so that its orbital maintenance requires the application of a suitable continuous thrust. Although the latter could be provided, in principle, by a low-thrust electric propulsion system, innovative propellantless propulsive technologies are well suited to such a mission scenario, due to their ability to generate thrust without requiring any propellant, thus significantly extending mission lifetime. This chapter focuses on the possibility of maintaining a displaced non-Keplerian orbit by means of both solar sails and electric solar wind sails (or E-sails). In fact, these advanced propulsion systems are both capable of generating a propulsive acceleration without consuming any propellant, by exploiting the solar radiation pressure (in case of solar sails) or the solar wind dynamic pressure (E-sails). This analysis uses recent models to provide a mathematical description of the propulsive acceleration generated by both propulsion systems, and different scenarios involving non-Keplerian orbits are analyzed. Particular focus is given to Type II displaced orbits, non-Keplerian orbits lying on the ecliptic plane, and heliostationary positions. Performance and attitude requirements are provided for each scenario. A linear stability analysis is also performed, in order to identify the combination of orbital parameters that characterize stable non-Keplerian orbits. The results suggest the feasibility of the mission scenarios discussed, but for most of them performance requirements are very demanding. A possible exception is non-Keplerian orbits lying on the ecliptic, which represent a very promising near-term scenario.


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    Titel :

    Displaced Non-Keplerian Orbits for Sun and Inner Planet Observation


    Beteiligte:
    Badescu, Viorel (Herausgeber:in) / Zacny, Kris (Herausgeber:in) / Bar-Cohen, Yoseph (Herausgeber:in) / Niccolai, Lorenzo (Autor:in) / Quarta, Alessandro A. (Autor:in) / Mengali, Giovanni (Autor:in)

    Erschienen in:

    Handbook of Space Resources ; Kapitel : 1 ; 3-39


    Erscheinungsdatum :

    28.04.2023


    Format / Umfang :

    37 pages




    Medientyp :

    Aufsatz/Kapitel (Buch)


    Format :

    Elektronische Ressource


    Sprache :

    Englisch





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