講演情報
[PPS07-P19]Phase curves of >20,000 small solar system bodies obtained by the Tomo-e Gozen transient survey
*吉田 二美1、伊藤 孝士2、浦川 聖太郎3、寺居 剛4、冨永 望5、諸隈 智貴 6、酒向 重行6、大澤 亮6、田中 雅臣7、濵﨑 凌5、Tomo-e Gozen collaboration (1.千葉工業大学惑星探査研究センター、2.国立天文台天文シミュレーションプロジェクト、3.特定非営利活動法人日本スペースガード協会、4.国立天文台ハワイ観測所、5.甲南大学、6.東京大学、7.東北大学)
キーワード：
小惑星、サーベイ、位相曲線
The Tomo-e Gozen project conducts optical wide-field survey programs with a wide-field CMOS camera, Tomo-e Gozen, attached on the 105-cm Schmidt telescope at the Kiso Observatory, the University of Tokyo. Tomo-e Gozen is the world's first wide-field CMOS camera which covers 20 square degrees with 84 chips of 35 mm full HD CMOS image sensors. A wide-field and high-cadence survey in the optical wavelengths began in 2018 with the Tomo-e Gozen (hereafter referred to as the Tomo-e Gozen transient survey). The main purpose of this survey is to detect young supernovae. However, the survey simultaneously detects a large number of moving objects in their images. As one of the by-products of the survey, here we show our preliminary result about production of phase curves (solar phase angles versus absolute magnitude) of more than 20,000 small solar system bodies including main-belt asteroids, near-Earth asteroids, Jupiter Trojans, Centaurs, and Transneptunian objects. Combining the moving object catalogue derived from the survey and the output ephemeris that the Horizons/JPL system provides, we are now able to obtain phase curves of these objects almost automatically. As the Kiso moving object catalogue is updated and being expanded on a daily basis, the number of the objects (small bodies) that we deal with goes up as well. Our result, when completed, will make a fair complement as well as a significant keystone to what is already published such as from the Pan-STARRS systematic survey on the knowledge of the surface characteristics of the small solar system bodies.