A near-rectilinear halo orbit (NRHO) is a halo orbit with slightly curved – or nearly straight – sides between close passes with an orbiting body. The 2022 CAPSTONE mission is the first such orbit in cislunar space, and this Moon-centric orbit will serve as a staging area for future lunar missions. The orbit could be used with other bodies in the Solar System and beyond.
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| - Orbite de halo presque rectiligne (fr)
- Near-rectilinear halo orbit (en)
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| - A near-rectilinear halo orbit (NRHO) is a halo orbit with slightly curved – or nearly straight – sides between close passes with an orbiting body. The 2022 CAPSTONE mission is the first such orbit in cislunar space, and this Moon-centric orbit will serve as a staging area for future lunar missions. The orbit could be used with other bodies in the Solar System and beyond. (en)
- Une orbite de halo presque rectiligne (NRHO, en anglais : Near-rectilinear halo orbit) est un type d'orbite de halo. Une utilisation d'une telle orbite est prévue dans l'espace cislunaire mais, au début de 2021, elle n'a été utilisée par aucun engin spatial. Cette orbite sera centrée sur la Lune et servira pour les futures missions lunaires. Cependant, une NRHO n'a pas besoin d'être utilisée pour un trajet Terre-Lune, et l'orbite pourrait être utilisée dans d'autres contextes autour d'autres corps célestes dans le système solaire et au-delà. (fr)
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| - More information needed to understand what is being plotted in what frame of reference (en)
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| - Une orbite de halo presque rectiligne (NRHO, en anglais : Near-rectilinear halo orbit) est un type d'orbite de halo. Une utilisation d'une telle orbite est prévue dans l'espace cislunaire mais, au début de 2021, elle n'a été utilisée par aucun engin spatial. Cette orbite sera centrée sur la Lune et servira pour les futures missions lunaires. Cependant, une NRHO n'a pas besoin d'être utilisée pour un trajet Terre-Lune, et l'orbite pourrait être utilisée dans d'autres contextes autour d'autres corps célestes dans le système solaire et au-delà. Les orbites NRHO sont une solution théorique au problème classique à trois corps en mécanique céleste. (fr)
- A near-rectilinear halo orbit (NRHO) is a halo orbit with slightly curved – or nearly straight – sides between close passes with an orbiting body. The 2022 CAPSTONE mission is the first such orbit in cislunar space, and this Moon-centric orbit will serve as a staging area for future lunar missions. The orbit could be used with other bodies in the Solar System and beyond. A halo orbit is a periodic, three-dimensional orbit associated with one of the L1, L2 and L3 Lagrange points. Near-rectilinear means that some segments of the orbit have a greater curvature than those of an elliptical orbit of the same maximum diameter, and other segments have a curvature less than that of an elliptical orbit of the same maximum diameter (taking maximum diameter as that of the smallest circle that contains the whole of the orbit). In the extreme case all segments have zero curvature with four points with infinite curvature (i.e. a polygon). Such a non-elliptical orbit would require at least two other bodies (e.g. the Earth and Moon), and thus NRHO orbits are one theoretical solution to the classic three-body problem in gravitational mechanics. Of the three bodies, one is taken to be of negligible mass (the spacecraft). There are four families of NRHO orbits associated with the L1 and L2 Lagrange points, two each in the northern and southern directions. The low perilune orbits are nearly polar. They are nearly stable, minimizing the artificial thrust required for station-keeping. (en)
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