Direct-retrograde orbit flips at planetary close encounters - The role of the Tisserand parameter

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Table 1

Relevant orbital data for (5335) Damocles and 2000 DG₈.

Asteroid	a (au)	e	i (°)	T_J	U_J	T_S	U_S	T_U	U_U	T_n	U_n
(5335) Damocles	11.8267	0.8668	61.8	1.150	1.360	1.331	1.292	1.993	1.004	2.838	0.402
2000 DG₈	10.7628	0.7938	129.2	−0.622	1.903	0.069	1.712	1.207	1.339	2.334	0.816

Notes. The columns contain, from left to right, orbital semi-major axis, eccentricity, inclination, Tisserand parameter and planetocentric velocity with respect to Jupiter, Saturn, Uranus and Neptune.

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