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В работе представлены результаты наблюдений спутников Урана и Нептуна, выполненных в 2020 г. с помощью метрового зеркального телескопа «Сатурн» (ГАО РАН) и 350-мм гида телескопа «Синтез» (КрАО РАН). Получено более 8 тыс. отдельных положений спутников Урана и Нептуна в системе каталога Gaia EDR3. Средние ошибки координат спутников по прямому восхождению и склонению, демонстрирующие внутреннюю сходимость результатов наблюдений, лежат в пределах 10—50 mas. The paper presents the results of observations of the Uranian and Neptunian satellites performed in 2020 with the 1-meter mirror telescope ‘Saturn’ (Pulkovo observatory) and the 350-mm guide telescope of the ‘Sintez’ telescope (Crimean observatory). More than 8 thousand separate positions of the satellites were obtained in the Gaia EDR3 catalog system. The average values of standard errors of the satellite normal place in right ascension and declination for the entire observation period, demonstrating the internal convergence of the observation results, lie within 10—50 mas. Работа выполнена при поддержке гранта РФФИ 19-32-90175.

We present observations of the satellites of Uranus and Neptune carried out using telescopes of the Pulkovo and Crimean observatories. Представлены наблюдения спутников Урана и Нептуна с помощью телескопов ГАО и КрАО РАН. Исследование выполнено при финансовой поддержке РФФИ в рамках научного проекта 19-32-90175.

The one-meter telescope-reflector `Saturn' (D=1 m, F = 4 m) was partially renovated at the Pulkovo observatory at the end of 2014. The telescope was equipped by CCD camera S2C with 14x14 arcmin field of view and 824 mas per pix scale. The observations of outer Jovian satellites have been performed in a test mode since January 2015. The exposure time of 30 seconds allows us to obtain images of stars up to magnitude 19.5 with the present state of the mirror and the equipment. The observations of outer Jovian satellites have been performed during testing period. These objects are interesting targets because their astrometric observations required to improve ephemeris and dynamic studies. Satellites positions have been determined on the basis of CCD images obtained within 6 nights. Astrometric reduction is performed by linear method using HCRF/UCAC4 and HCRF/URAT1. Internal accuracy of satellites positions has been estimated as 20 - 100 mas. The absolute values of residuals O-C do not exceed 100 mas in most cases. The independent tests have been carried out by the direct comparison with the results of observations of the Jovian satellite Himalia performed simultaneously by the Normal astrograph (the largest difference was 113 mas). This work has been partially supported by RFBR (12-02-00675-a) and the 22 Program of RAS Praesidium., Comment: 11 pages, 4 figures, 2 tables. Paper has been submitted to Solar System Research journal (www.springer.com/astronomy/journal/11208). We are waiting for accepting