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• W2044918669 abstract "Abstract Hyperion is an irregularly shaped object of about 285 km in mean diameter, which appears as the likely remmant of a catastrophic collisional evolution. Since the peculiar orbit of this satellite (in 4 3 resonance locking with Titan) provides an effective mechanism to prevent any reaccretion of secondary fragments originated in a breakup event, the present Hyperion is probably the “core” of a disrupted precursor. This contrasts with the other, regularly shaped small satellites of Saturn, which, according to B.A. Smith et al. [Science 215, 504–537 (1982)], were disrupted several times but could reaccrete from narrow rings of collisional fragments. The numerical experiments performed to explore the region of the phase space surrounding the present orbit show that most fragments ejected with a relative velocity ⪸0.1 km / sec rapidly attain chaotic-type orbits, having repeated close encounters with Titan. Ejection velocities of this order of magnitude are indeed expected for a collision at a velocity of ∼ 10 km/sec with a projectile-to-target mass ratio of the order of 10−3; similar effects could be produced by less energetic but nearly grazing collisions. Such events are not likely to displace the largest remnant (i.e., the present Hyperion) outside the stable region of the phase space associated with the resonance, but could be responsible for the large amplitude of the observed orbital libration." @default.
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• W2044918669 date "1983-05-01" @default.
• W2044918669 modified "2023-10-18" @default.
• W2044918669 title "Hyperion: Collisional disruption of a resonant satellite" @default.
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• W2044918669 doi "https://doi.org/10.1016/0019-1035(83)90203-8" @default.
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