Physical Parameters of the Asteroid 2017 VR12 from Radar and Photometric Observations
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Results of radar and photometric observations of the asteroid 2017 VR12 are presented. The observations were carried out during the asteroid’s close approach to the Earth in 2018 on March 5 with 32-m radio telescopes at the Zelenchukskaya and Badary Observatories and on March 6 with a 0.65-m optical telescope at the Ussuriysk Astrophysical Observatory. The asteroid’s radar observations were performed in the bistatic mode at a frequency of 8.56 GHz in combination with the 70-m Goldstone antenna. The echo power spectra for the asteroid were obtained as a result of the observations. The poleon silhouette breadth of this asteroid is 138 ± 14 m. We have estimated the radar albedos, 0.32 ± 0.04 and 0.31 ± 0.04, and the circular polarization ratios, 0.36 ± 0.02 and 0.34 ± 0.01, for the Zelenchukskaya and Badary Observatories, respectively. Based on our photometric observations, we have obtained the asteroid’s light curve, determined its rotation period, 1.378 ± 0.03 h, and constructed a two-dimensional surface contour.
KeywordsNEAs asteroids radar observations photometry
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- 6.P. Pravec et al., https://doi.org/www.asu.cas.cz/ppravec. Accessed 2018.