The transient Jupiter Trojan-like orbit of P/2019 LD2 (ATLAS)

Henry H. Hsieh*, Alan Fitzsimmons, Bojan Novaković, Larry Denneau, Aren N. Heinze

*Corresponding author for this work

Research output: Contribution to journalArticlepeer-review

3 Citations (Scopus)


Comet P/2019 LD2 has orbital elements currently resembling those of a Jupiter Trojan, and therefore superficially appears to represent a unique opportunity to study the volatile content and active behavior of a member of this population for the first time. However, numerical integrations show that it was previously a Centaur before reaching its current Jupiter Trojan-like orbit in 2018 July, and is expected to return to being a Centaur in 2028 February, before eventually becoming a Jupiter-family comet in 2063 February. The case of P/2019 LD2 highlights the need for mechanisms to quickly and reliably dynamically classify small solar system bodies discovered in current and upcoming wide-field surveys.

Original languageEnglish
Article number114019
Early online date03 Aug 2020
Publication statusPublished - 15 Jan 2021


  • Centaurs
  • Comets
  • Dynamics
  • Trojan asteroids

ASJC Scopus subject areas

  • Astronomy and Astrophysics
  • Space and Planetary Science


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