Observations of NEO and Main Belt asteroids in 2018–2021 using the Baldone Schmidt telescope

Abstract

During 2018–2021 in the Baldone observatory, 49 new asteroids were discovered and more than 6000 astrometric positions for 1122 asteroids were published in MPC circulars. In this period in 221 observation nights, 5544 CCD images were obtained, which covered 648 square degrees of sky. Of them, about 1000 CCD images were devoted to studying the dynamics of NEO-type and Main belt asteroids. For asteroids, rotation periods and amplitude of brightness variation in the G(RP) passband were obtained. Photometric data reductions for the CCD images were done using the MaxIM DL program. The G(RP) photometric magnitudes for reference stars were taken from the Gaia DR2 release. Through 15 minutes and 5 minutes steps using second-order Fourier analysis, the best size of periods for eleven NEO and main belt asteroids was determined. Our main goals are contributing to checking our methodology to obtain the rotation periods by analyzing photometric broadband measurements.