6 band photometric and spectroscpoic observations of Vesta

Abstract

Asteroid 4 Vesta is a peculiar asteroid due to its basaltic composition. Many multi-band observations for Vesta were carried out and at last the image of Vesta were obtained by Hubble Space Telescope in 1994, and a geologic map was made.2003.
We made the visual observation using a transportable 10 cm refracting telescope with a MUTOH CV-16 CCD in ECAS filter system. Infrared observations were carried out using 105cm Schmidt telescope with Mitsubishi 1040 x 1040 PtSi CSD (KONIC) in H band at Kiso Observatory. And we made spectroscopic observation (500nm to 900nm) using a 65 cm reflecting telescope and GCS (Gunma Compact Spectrograph) at Gunma Astronomical Observatory.
We report consideration of the effect of space weathering as well as the inhomogeneous distribution of minerals on the surface of Vesta.