Physical parameters of near-Earth asteroid 2017 VR12 from radar and optical photometric observationsТекст статьи
We report results of bistatic radar and optical photometric observations of near-Earth Asteroid 2017 VR12. This asteroid closest approach was on March 7 at a distance of 0.0097 au. The continuous wave echo power spectra were obtained during March 5, 2018 using Goldstone radar to transmit and 32-m radio telescopes in Zelenchukskaya and Badary observatories to receive the echoes. Light curve data were made using 0.65 m telescope at the Ussuriysk Astrophysical Observatory on March 6, 2018. We find that the asteroid rotates with a period 1.378 ± 0.03 hours and have a pole-on silhouette breadth of 138 m. Our estimates of radar albedo are 0.32 ± 0.04 and 0.31 ± 0.04 and the circular polarization ratios are 0.36 ± 0.02 and 0.34 ± 0.01 for Zelenchukskaya and Badary correspondingly.