JpGU-AGU Joint Meeting 2017

講演情報

[EE] ポスター発表

セッション記号 B (地球生命科学) » B-AO 宇宙生物学・生命起源

[B-AO01] [EE] Astrobiology: Origins, Evolution, Distribution of Life

2017年5月24日(水) 10:45 〜 12:15 ポスター会場 (国際展示場 7ホール)

コンビーナ:小林 憲正(横浜国立大学大学院工学研究院)、大石 雅寿(国立天文台天文データセンター)、薮田 ひかる(広島大学大学院理学研究科地球惑星システム学専攻)、Kirschvink Joseph(Division of Geological and Planetary Sciences, California Institute of Technology, Pasadena, CA, USA)

[BAO01-P06] Temperature Measurement Results with the Mechanical Space Thermometer for the Tanpopo

*橋本 博文1,2今井 栄一3矢野 創1,2横堀 伸一4山岸 明彦4 (1.国立研究開発法人 宇宙航空研究開発機構 宇宙科学研究所、2.総合研究大学院大学、3.長岡技術科学大学、4.東京薬科大学)

キーワード:Tanpopo, International Space Station, Mechanical Space Thermometer

Temperature in the space is very interesting as astrobiology because it controls the life and death of the creature in space environment. The mechanical thermometer using a bimetallic strip coil was developed for the Tanpopo mission. The Tanpopo mission is a multi-year passive exposure experiment for astrobiology exposure and micrometeoroid capture onboard the Exposed Experiment Handrail Attachment Mechanism (ExHAM) at the Japanese Experiment Module ‘Kibo’ (JEM) Exposed Facility (EF) on the International Space Station (ISS). The Tanpopo mission apparatuses were launched by the SpaceX-6 Dragon CRS-6 on April 14 2015, from the Cape Canaveral Air Force Station in the U.S.A. Since its microbial exposure experiment requires recording the maximum temperature that the Tanpopo exposure panel experiences, we have developed a mechanical thermometer with no electric power supplied from the ExHAM. At a given time and orbital position of the ISS, the thermometer indicator was video-imaged by the extravehicular video camera attached to the Kibo-EF and controlled from the ground. With these images analyzed, we were able to derive the temperatures of the Tanpopo exposure panels on the space pointing face of the ExHAM. Temperature measurement results with the mechanical space thermometer are shown in Fig.1. Twelve times of observation of the thermometer was carried out in 2015 and 2016. The maximum and minimum temperature were 26.4±5 ℃ and -41.6±5 ℃, respectively. Now this passive and mechanical thermometer is available to other space missions with no electric supplies required and thus highly expands the possibility of new extravehicular experiments and explorations for both human and robotic missions.