Japan Spaceguard Association (JSGA)
Japan Spaceguard Association (JSGA)
Japan Spaceguard Association (JSGA)
Japan Spaceguard Association (JSGA)
Japan Spaceguard Association (JSGA)
Japan Spaceguard Association (JSGA)
Japan Spaceguard Association (JSGA)
出版者
宇宙航空研究開発機構(JAXA)
出版者（英）
Japan Aerospace Exploration Agency (JAXA)
雑誌名
宇宙航空研究開発機構特別資料: 第8回スペースデブリワークショップ講演資料集
雑誌名(英)
JAXA Special Publication: Proceedings of the 8th Space Debris Workshop
Inactive artificial objects, such as old satellites, spent rocket bodies, and fragments from disintegration, are often rotating and tumbling. Light curves derived from photometric observations are one of the most effective techniques for examining the physical characteristics of such space objects. Light curve observations were done for the Engineering Test Satellite, ETS-8, decommissioned in January 2017. It exhibits time variation in its brightness after the decommission. Observations of ETS-8 were done using the CCD device with TDI method, of which an exposure is made by shifting electrical charge while a mechanical shutter is open. Light curve data was extracted from the profile of the trailed image caused by parallel charge transfer. We tried to reproduce the observed light curve using a simple shape model. In the model, the satellite was divided into three parts (main body, solar cell paddle, and large antenna). The characteristic of each surface was assumed to be diffuse reflection and/or specular reflection, then the brightness variation in each surface was calculated when rotating. The brightness of each part was added together after multiplied by each appropriate reflectance and surface area, then the observed light curve was reproduced.
内容記述
形態: カラー図版あり
内容記述（英）
Physical characteristics: Original contains color illustrations
Observed light curve and its shape model of the decommissioned satellite ETS-8
AA1830034047.pdf
(3.56MB)
