Measuring the Orbit Drift of Near-Earth Asteroids by the Yarkovsky Effect

The Yarkovsky effect causes the semimajor axis drift of near-Earth asteroids. The drift can be detected by a precise orbit determination process. Using the proposed algorithm, 2233 out of 27,078 near-Earth asteroids are chosen as the initial candidates. Out of these initial candidates, 769 have a me...

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Bibliographic Details
Published in:The Astrophysical journal 2023-06, Vol.950 (1), p.50
Main Authors: Liu, Xin, Hou, Xi-Yun, Yang, Zhi-Tao, Gan, Qing-Bo, Zhang, Yao
Format: Article
Language:English
Subjects:
Algorithms
Asteroids
Astrometry
Astrophysics
Drift
Dynamic models
Earth
Earth axis
Near-Earth Objects
Orbit determination
Signal to noise ratio
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Summary:The Yarkovsky effect causes the semimajor axis drift of near-Earth asteroids. The drift can be detected by a precise orbit determination process. Using the proposed algorithm, 2233 out of 27,078 near-Earth asteroids are chosen as the initial candidates. Out of these initial candidates, 769 have a measurable Yarkovsky effect with a signal-to-noise ratio (S/N) larger than 1, and 166 have a measurable Yarkovsky effect with an S/N larger than 3. The ratio between retrograde and prograde near-Earth asteroids is plotted with respect to their size. An average ratio of 2 is found for asteroids with an absolute magnitude between 14 and 21. The measurement work is carried out based on orbit determination software developed by the authors that considers a high-precision dynamical model.
ISSN:0004-637X
1538-4357
DOI:10.3847/1538-4357/accc81