Optical spectroscopy and photometry of main-belt asteroids with a high orbital inclination

作     者：Aya Iwai Yoichi Itoh Tsuyoshi Terai Ranjan Gupta Asoke Sen Jun Takahashi 

作者机构：National Institute of Advanced Industrial Science and TechnologyIbaraki 305-8563Japan Nishi-Harima Astronomical ObservatoryCenter for AstronomyUniversity of HyogoISIyogo 679-5313Japan National Astronomical Observatory of JapanHiloHawaii 96720USA Inter-University Centre for Astronomy and AstrophysicsGaneshkhindPune 411 007India Department of PhysicsAssam UniversitySilchar 788 001India 

出 版 物：《Research in Astronomy and Astrophysics》 (天文和天体物理学研究（英文版）)

年 卷 期：2017年第17卷第2期

页      面：43-50页

核心收录：

学科分类：0709[理学-地质学] 07[理学] 0708[理学-地球物理学] 070401[理学-天体物理] 0704[理学-天文学] 0825[工学-航空宇航科学与技术] 

基　　金：partially supported by“the Japan-India Cooperative Science Program”carried out by the Japan Society for the Promotion of Science(JSPS) the Department of Science and Technology(DST),Government of India 

主　　题：minor planets, asteroids general -- techniques spectroscopic 

摘      要：We carried out low-resolution optical spectroscopy of 51 main-belt asteroids, most of which have highly-inclined orbits. They are selected from D-type candidates in the SDSS-MOC 4 catalog. Using the University of Hawaii 2.2 m telescope and the Inter-University Centre for Astronomy and Astrophysics 2 m telescope in India, we determined the spectral types of 38 asteroids. Among them, eight asteroids were classified as D-type asteroids. Fractions of D-type asteroids are 3.0 ± 1.1% for low orbital inclination main-belt asteroids and 7.3 ± 2.0% for high orbital inclination main-belt asteroids. The results of our study indicate that some D-type asteroids were formed within the ecliptic region between the main belt and Jupiter, and were then perturbed by Jupiter.