The Second Earth Trojan 2020 XL<sub>5</sub>
نویسندگان
چکیده
The Earth Trojans are co-orbitals librating around the Lagrange points $L_4$ or $L_5$ of Sun-Earth system. Although many numerical studies suggest that they can maintain their dynamical status and be stable on timescales up to a few tens thousands years even longer, remain an elusive population. Thus far only one transient member (2010 TK$_7$) has been discovered serendipitously. Here, we present study asteroid 2020 XL$_5$. With our meticulous followup astrometric observations object, confirmed it is new Trojan. However, its eccentric orbit brings close encounters with Venus frequent basis. Based N-body integration, found was captured into current Trojan in 15th century, then likelihood 99.5% leave region within next $\sim$10 kyr. Therefore, most likely XL$_5$ dynamically unstable over this timescale.
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ژورنال
عنوان ژورنال: The astrophysical journal
سال: 2021
ISSN: ['2041-8213', '2041-8205']
DOI: https://doi.org/10.3847/2041-8213/ac37bf