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Fumihiko Usui,SUNAO HASEGAWA,Masateru Ishiguro,THOMAS G. MULLER,TAKAFUMI OOTSUBO 한국천문학회 2017 天文學論叢 Vol.32 No.1
Presently, the number of known asteroids is more than 710,000. Knowledge of size andalbedo is essential in many aspects of asteroid research, such as the chemical composition andmineralogy, the size-frequency distribution of dynamical families, and the relationship between smallbodies in the outer solar system or comets. Recently, based on the infrared all-sky survey data obtainedby \emph{IRAS}, \emph{AKARI}, and \emph{WISE}, the large asteroid catalogs containing size and albedo datahave been constructed. In this paper, we discuss the compositional distribution in the mainbelt regions based on the compiled data on size, albedo, and separately obtained taxonomic typeinformation.