The Second Earth Trojan 2020 XL5

@article{Hui2021TheSE,
  title={The Second Earth Trojan 2020 XL5},
  author={Man-To 文韜 Hui 許 and Paul A. Wiegert and David J. Tholen and Dora F{\"o}hring},
  journal={The Astrophysical Journal Letters},
  year={2021},
  volume={922}
}
The Earth Trojans are coorbitals librating around the Lagrange points L 4 or L 5 of the 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 of thousands of years or even longer, they remain an elusive population. Thus far only one transient member (2010 TK7) has been discovered serendipitously. Here, we present a dynamical study of asteroid 2020 XL5. With our meticulous follow-up astrometric… 
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