Retrograde near-circular periodic orbits near equatorial planes of small irregular bodies
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DOI: 10.1007/s10509-017-3148-2
Abstract: Research on the stabilities of periodic orbits is useful for selection of parking orbits in asteroid and comet missions. In this paper, retrograde near-circular periodic orbits near equatorial planes (RNPOEP) of small irregular bodies are… read more here.
Keywords: circular periodic; orbits near; near equatorial; near circular ... See more keywords
Observability of spherical photon orbits in near-extremal Kerr black holes
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DOI: 10.1103/physrevd.100.044058
Abstract: We investigate the spherical photon orbits in near-extremal Kerr spacetimes. We show that the spherical photon orbits with impact parameters in a finite range converge on the event horizon. Furthermore, we demonstrate that the Weyl… read more here.
Keywords: photon orbits; spherical photon; near extremal; orbits near ... See more keywords