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In the 1-2.5 micron range, spectroscopic observations are made on theAcuA-spec asteroids, whose spectra were obtained in a continuous covered modebetween 2.5-5.0 micron by AKARI. Based on the Bus-DeMeo taxonomy (DeMeo et al.2009, Icarus, 202, 160), all the AcuA-spec asteroids are classified, using thepublished and our observational data. Additionally, taking advantage of theBus-DeMeo taxonomy characteristics, we constrain the characteristic eachspectral type by combining the taxonomy results with the other physicalobservational data from colorimetry, polarimetry, radar, and radiometry. As aresult, it is suggested that certain C-, Cb-, B-type, dark X-, and D-complexasteroids have spectral properties compatible with those of anhydrousinterplanetary dust particles with tiny bright material, such as water ice.This supports the proposal regarding the C-complex asteroids (Vernazza et al.2015, ApJ, 806, 204; 2017, AJ, 153, 72). A combination of the Bus-DeMeotaxonomy for AcuA-spec asteroids and the presumptions with other physical cluessuch as the polarimetric inversion angle, radar albedo, and mid-infraredspectroscopic spectra will be beneficial for surface material constraints, fromthe AcuA-spec asteroid observations.

Follow-up observations for the Asteroid Catalog using AKARI Spectroscopic Observations