Dynamical Classification of Trans-Neptunian Objects Detected by the Dark Energy Survey

T. Khain, J. C. Becker, Hsing Wen Lin, D. W. Gerdes, D. W. Gerdes, F. C. Adams, F. C. Adams, P. Bernardinelli, G. M. Bernstein, K. Franson, L. Markwardt, S. Hamilton, K. Napier, M. Sako, T. M.C. Abbott, S. Avila, E. Bertin, E. Bertin, D. Brooks, E. Buckley-GeerD. L. Burke, D. L. Burke, A. Carnero Rosell, A. Carnero Rosell, M. Carrasco Kind, M. Carrasco Kind, J. Carretero, L. N.Da Costa, L. N.Da Costa, J. De Vicente, S. Desai, H. T. Diehl, P. Doel, B. Flaugher, J. Frieman, J. Frieman, J. Garciá-Bellido, E. Gaztanaga, E. Gaztanaga, D. Gruen, D. Gruen, D. Gruen, R. A. Gruendl, R. A. Gruendl, J. Gschwend, J. Gschwend, G. Gutierrez, D. L. Hollowood, K. Honscheid, K. Honscheid, D. J. James, N. Kuropatkin, M. A.G. Maia, M. A.G. Maia, J. L. Marshall, F. Menanteau, F. Menanteau, C. J. Miller, C. J. Miller, R. Miquel, A. A. Plazas, E. Sanchez, V. Scarpine, M. Schubnell, I. Sevilla-Noarbe, M. Smith, F. Sobreira, F. Sobreira, E. Suchyta, M. E.C. Swanson, G. Tarle, A. R. Walker, W. Wester

Research output: Contribution to journalArticlepeer-review


The outer solar system contains a large number of small bodies (known as trans-Neptunian objects or TNOs) that exhibit diverse types of dynamical behavior. The classification of bodies in this distant region into dynamical classes-subpopulations that experience similar orbital evolution- A ids in our understanding of the structure and formation of the solar system. In this work, we propose an updated dynamical classification scheme for the outer solar system. This approach includes the construction of a new (automated) method for identifying mean motion resonances. We apply this algorithm to the current data set of TNOs observed by the Dark Energy Survey (DES) and present a working classification for all of the DES TNOs detected to date. Our classification scheme yields 1 inner centaur, 19 outer centaurs, 21 scattering disk objects, 47 detached TNOs, 48 securely resonant objects, 7 resonant candidates, and 97 classical belt objects. Among the scattering and detached objects, we detect 8 TNOs with semimajor axes greater than 150 au.

Original languageEnglish (US)
Article number133
JournalAstronomical Journal
Issue number4
StatePublished - Apr 2020

ASJC Scopus subject areas

  • Astronomy and Astrophysics
  • Space and Planetary Science


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