Abstract The mechanism that forms the different resonant families of the asteroid belt between the orbits of Jupiter and Mars is not completely understood. To study the resonant capture mechanism and the origin of orbits of some asteroid families in mean motion resonances with Jupiter, furthermore to give a possible explanation of this problem, we performed in situ numerical simulations of the 3-dimensional semi-analytical model of the Sun-Jupiter-particle system. We examined the numbers and orbits of particles captured along the Jupiter's present orbit (including the L3, L4 and L5 Lagrange points) for 7000 Jupiter years. In our simulations we did not distinguish between planetesimals, interplanetary dust and asteroids, because we investigated the restricted three-body problem taking into account only gravitation. We found that the asteroid families in 4:3, 1:1, 4:5, 3:4, 2:3, 5:8, 4:7 and 5:9 resonances may have formed from the asteroids captured, launched and kept on their orbits not only by the L4 and L5 points, but also by the unstable L3 point and certain areas along the Jupiter's path. Furthermore, we found possible new asteroid families in 4:5 and 3:4 resonances, no any member of which have yet been identified. Thus, Jupiter forms a shield which protects the inner Solar System from asteroids moving with speeds not significantly differing from that of Jupiter.
Highlights Our aim is to demonstrate the resonant capture mechanism of dynamically cold particles along the Jupiter's orbit. We performed in situ simulations of the 3D semi-analytical model of the Sun-Jupiter-particle system. The capture efficiency of both the L4 and L5 points at the Jupiter's aphelion is 24% higher than at its perihelion. The particles captured along the Jupiter's present orbit form the 1:1, 4:3, 4:5, 3:4, 2:3, 5:8, 4:7, 5:9 resonance families.
Jupiter, the great celestial organizer: On the origin of orbits of some asteroid families in mean motion resonances with Jupiter
Acta Astronautica ; 211 ; 208-215
2023-06-04
8 pages
Article (Journal)
Electronic Resource
English
Celestial mechanics , Sun , Jupiter , Lagrange points , Greeks , Trojans , Hilda , Thule , Asteroids , Mean motion resonance
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