00747naa#a2200193#i#450# EN\\bibl\33971 20260310083554.2 2500-0535 20191217b2019####ek#y0engy0150####ca ENG RU Optical observations of small spacecraft and space debris at ISTP SB RAS Sayan Observatory Journal article Irkutsk Institute of Solar-Terrestrial Physics SB RAS 2019 3 с. Journal article local Астрономия. Астрофизика. Исследование космического пространства. Геодезия. 52 ENG Korobtsev Ivan Vladimirovich Mishina Marina Nikolaevna ras.editorum.ru