  Chondritic meteorites primarily contain millimeter-sized spherical objects,
the so-called chondrules; however, the co-accretion process of chondrules and
matrix grains is not yet understood. In this study, we investigate the ejection
process of chondrules via collisions of fluffy aggregates composed of
chondrules and matrices. We reveal that fluffy aggregates cannot grow into
planetesimals without losing chondrules if we assume that the chondrite parent
bodies are formed via direct aggregation of similar-sized aggregates.
Therefore, an examination of other growth pathways is necessary to explain the
formation of rocky planetesimals in our solar system.
