Physical modelling of near-Earth asteroid (23187) 2000 PN9 with ground-based optical and radar observations
Dover L. Lowry S.C. Rożek A. Rozitis B. Jackson S.L. Zegmott T. Krugly Y.N. Belskaya I.N. Fitzsimmons A. Green S.F. Snodgrass C. Weissman P.R. Brozović M. Benner L.A.M. Busch M.W. Ayvazian V.R. Chiorny V. Inasaridze R.Y. Krugov M. Mykhailova S. Reva I. Hibbert J.
1 November 2023Oxford University Press
Monthly Notices of the Royal Astronomical Society
2023#525Issue 34581 - 4595 pp.
We present a physical model and spin-state analysis of the potentially hazardous asteroid (23187) 2000 PN9. As part of a long-Term campaign to make direct detections of the Yarkovsky-OKeefe-Radzievskii-Paddack (YORP) effect, we collected optical light curves of the asteroid between 2006 and 2020. These observations were combined with planetary radar data to develop a detailed shape model, which was used to search for YORP acceleration. We report that 2000 PN9 is a relatively large top-shaped body with a sidereal rotation period of 2.53216 ± 0.00015 h. Although we find no evidence for rotational acceleration, YORP torques smaller than cannot be ruled out. It is likely that 2000 PN9 is a YORP-evolved object, and may be an example of YORP equilibrium or self-limitation.
methods: data analysis , methods: observational , minor planets, asteroids: individual: (23187) 2000 PN9 , radiation mechanisms: Thermal , techniques: photometric , techniques: radar astronomy
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Centre for Astrophysics and Planetary Science, University of Kent, Canterbury, CT2 7NH, United Kingdom
Institute for Astronomy, University of Edinburgh, Royal Observatory, Edinburgh, EH9 3HJ, United Kingdom
Planetary and Space Sciences, School of Physical Sciences, The Open University, Milton Keynes, MK7 6AA, United Kingdom
Institute of Astronomy, V. N. Karazin Kharkiv National University, Kharkiv, 61022, Ukraine
Astronomical Observatory Institute, Faculty of Physics, A. Mickiewicz University, Poznan, PL-60-286, Poland
LESIA, Observatoire de Paris, Universit e PSL, CNRS, Universit e Paris Cit e, Sorbonne Universite, Meudon, F-92195, France
Astrophysics Research Centre, Queens University Belfast, Belfast, BT7 1NN, United Kingdom
Planetary Sciences Institute, Tucson, 85719, AZ, United States
Jet Propulsion Laboratory, California Institute of Technology, Pasadena, 91109, CA, United States
SETI Institute, Mountain View, 94032, CA, United States
E. Kharadze Georgian National Astrophysical Observatory, GA, Abastumani, 0301, Georgia
Samtskhe-Javakheti State University, GA, Akhaltsikhe, 0080, Georgia
Fesenk O v Astrophysical Institute, Almaty, 050020, Kazakhstan
Isaac Newton Group, Apartado de correos 321 Santa Cruz de La Palma, Canary Islands, E-38700, Spain
Centre for Astrophysics and Planetary Science
Institute for Astronomy
Planetary and Space Sciences
Institute of Astronomy
Astronomical Observatory Institute
LESIA
Astrophysics Research Centre
Planetary Sciences Institute
Jet Propulsion Laboratory
SETI Institute
E. Kharadze Georgian National Astrophysical Observatory
Samtskhe-Javakheti State University
Fesenk O v Astrophysical Institute
Isaac Newton Group
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