Radar observations of near-Earth asteroid 2003 SD220Full text
We report radar observations of near-Earth Asteroid 2003 SD220 by the 32-m radio telescopes in Zelenchukskaya and Svetloe Observatories during its close approach to the Earth in December 2018. We obtained continuous wave echo power spectra in December 20 and 22 when Goldstone conducted international bistatic radar observations of 2003 SD220 with the 64-m Sardinia Radio Telescope. We revealed that the asteroid is elongated with a length of at least 2.7 km. Our estimates of the circular polarization ratio is 0.25 and radar albedo is 0.17 suggests S-class NEA.