小行星是太陽系中數量最多的成員。小行星的表面成分對決定他們的演化歷史以及和太陽系其他天體的互動來說是重要的因素。轉動解析光譜可以用來研究小行星的表面變化。我們在2011年用鹿林一米望遠鏡上的Hiyoyu光譜儀觀測了12顆小行星。資料分析是用標準的IRAF軟體。我們發現有3顆小行星在觀測期間有顯著的變化。要確定這些變化是否為其表面成分的不同，更多研究是必須的。

Asteroids are the major members in Solar system quantitatively. The surface composition of asteroids is an important factor to determine their evolutional history as well as their interaction to other Solar system bodies. Rotationally resolved spectroscopy can be used to study the surface variations of asteroids. We used Hiyoyu spectrometer attached to Lulin One-meter telescope to perform observations on 12 asteroids in 2011. Data reduction is done with standard IRAF program. We found three asteroids show significant variation during our observation. Further studies are needed to confirm whether these variations are compositional differences on their surface.

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