Keywords

оН ГМЮВЕМХЪЛ н – я, ОНКСВЕММШЛ ОПХ СКСВЬЕМХХ НПАХР 356 968 МСЛЕПНБЮММШУ ЮЯРЕПНХДНБ, НОПЕДЕКЕМШ ЯХЯРЕЛЮРХВЕЯЙХЕ НЬХАЙХ ГБЕГДМШУ ЙЮРЮКНЦНБ USNO A2.0, UCAC-2 Х UCAC3. мЕАЕЯМЮЪ ЯТЕПЮ ПЮГДЕКЕМЮ МЮ 10 212 АКХГЙХУ ОН ОКНЫЮДХ Х ПЮГЛЕПЮЛ СВЮЯРЙНБ. йЮФДНЕ ХГ 70 234 284 МЮАКЧДЕМХИ, ОПНХГБЕДЕММШУ ОНЯКЕ 2001 Ц., НРМЕЯЕМН Й РНЛС ХКХ ХМНЛС СВЮЯРЙС МЕАЮ. нЬХАЙХ ГБЕГДМШУ ЙЮРЮКНЦНБ ДКЪ ЙЮФДНЦН СВЮЯРЙЮ БШВХЯКЕМШ ЙЮЙ ЯПЕДМЕЕ ЮПХТЛЕРХВЕЯЙНЕ ЯННРБЕРЯРБСЧЫХУ ГМЮВЕМХИ н – я. йПНЛЕ РНЦН, ДКЪ ВЮЯРХ ОКНЫЮДНЙ МЮ МЕАЕЯМНИ ЯТЕПЕ НОПЕДЕКЕМШ ЯЙНПНЯРХ ХГЛЕМЕМХЪ ЯХЯРЕЛЮРХВЕЯЙХУ НЬХАНЙ ЙЮРЮКНЦЮ USNO A2.0.

Improving the orbit of 356,968 numbered asteroids enabled us to calculate systematic biases in the star catalogs USNO A2.0, UCAC-2 and UCAC-3 from the calculated н-я values. The celestial sphere was divided into 10,212 sectors which were identical in size and area. Each of the 70 234 284 observations made after 2001 was referred to a certain sky sector. The biases in the star catalogs were calculated for each sector as the arithmetic mean values of the corresponding O – C. The variability rates of the USNO A2.0 catalog systematic errors were defined for some celestial sphere sectors.