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

• 来源期刊: 天文和天体物理学研究
• 年，卷（期）: 2017,（2）
• 页码范围: 17.1-17.8
• 页数: 2页
• 语种: 英文
• DOI: 10.1088/1674-4527/17/2/17

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 2.2m telescope and the Inter-University Centre for Astronomy and Astrophysics 2m 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.