Results of Polarimetric Monitoring of Near-Earth Asteroids at the 2.6-m KrAO Telescope and the 2-m Telescope of the Terskol Peak Observatory

The article presents preliminary results of polarimetric monitoring of near-Earth asteroids (NEA), carried out with 2.6-meter telescope of the Crimean Astrophysical Observatory and the 2-meter telescope of the Terskol Peak Observatory. As part of the observations, 19 phase dependences of NEA polarization were obtained, and for such data were obtained for the first time for 17 asteroids, which significantly supplemented the existing polarimetric database. Near-Earth asteroids can be observed at large phase angles, which allows us to significantly expand our knowledge of the phase dependences of asteroids of different spectral classes—S, C and E. An asteroid with an extremely high degree of polarization, 25 330 (1999 KV4), has been discovered, reaching 38.5% at a phase angle of 75.7°, which suggests the presence of sublimation-dust activity. In addition, asteroids 52768 and 159402 exhibited similar orbital parameters and polarization values, suggesting that they are parts of the same parent body.