Comets and carbonaceous asteroids are the remnants of planetesimals that remain in the current solar system.

In recent years, the differences between these objects have become ambiguous. In this talk,

we consider the differences between these objects during the formation epoch, especially based on the polarimetric observation results.

Based on the scientific motivation, we will explain why a polarization instrument is necessary, especially in a domestic observatory.
We would invite researchers who are NOT so much interested in solar system research to participate.

In particular, we would ask those who are dissatisfied with the weather conditions in the domestic observatories,

or those interested in polarimetric observations, and think about a future polarimetric instrument in Korea together.