The paper presents results of evaluating the precision of determining the Yarkovsky effect parameter A2 for asteroids with small perihelion distances known by January 2021. It is shown that the arc length has a significant effect on the precision of determining A2. As the interval increases, the root mean square error of the parameter decreases. For asteroids (3200) Phaethon and (137924) 2000 BD19 with a large arc length, an experiment was carried out to decrease the number of real observations. A decrease of the interval and the number of observations leads to a loss in the precision of the parameter being determined. Model observations based on real ones with an increase in their precision showed that the root mean square error of the A2 parameter decreases in proportion with the increase in the observation precision. The increase of the arc length using model observations confirmed the conclusion about the inverse proportionality of the A2 uncertainty to the number and interval of observations.
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Translated from Izvestiya Vysshikh Uchebnykh Zavedenii, Fizika, No. 9, pp. 170–174, September, 2021.
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Galushina, T.Y., Letner, O.N. & Syusina, O.M. Estimation of Precision of Determining the Yarkovsky Effect Parameter Based on Real and Model Observations of Asteroids. Russ Phys J 64, 1774–1779 (2022). https://doi.org/10.1007/s11182-022-02518-3
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DOI: https://doi.org/10.1007/s11182-022-02518-3