Optical spectroscopy and photometry of main-belt asteroids with a high orbital inclination. (February 2017)

• Record Type: Journal Article
• Authors: Iwai, Aya; Itoh, Yoichi; Terai, Tsuyoshi; Gupta, Ranjan; Sen, Asoke; Takahashi, Jun
• Is Part Of: Research in astronomy and astrophysics. Volume 17:Number 2(2017:Feb.)
• Publication Date: 2017-02
• Subjects: minor planets -- asteroids -- general—techniques -- spectroscopic; Astronomy -- Periodicals; Astrophysics -- Periodicals; 520.5
• DOI: 10.1088/1674-4527/17/2/17
• Languages: English
• ISSNs: 1674-4527

Abstract

Abstract: 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.