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Zhang Jiaxiang (; born in Oct. 1932), also known as Chia-Hsiang Chang, is a Chinese astronomer affiliated with Purple Mountain Observatory, Chinese Academy of Sciences, and president of the Minor Planet Foundation at that observatory. He discovered asteroid (5384) 1957 VA (credited as C.-H. Chang). ==Biography== Zhang Jiaxiang, astronomer, was born in Oct. 1932 in Nanjing, Jiangsu province. In 1951, he first joined the Purple Mountain Observatory as a technician, supervised by director Zhang Yuzhe. In 1957, Zhang Yuzhe and Zhang Jiaxiang worked together and published a paper discussing the orbit of artificial satellite. From 1965 to 1972, Prof. Zhang led a research group to accomplish the project of orbit determination of the first Chinese artificial satellite and thereafter the systematic studies of the orbit of Chinese synchronous satellite. In total, they have discovered more than 150 internationally numbered new minor planets and four comets. In the 1990s, he accurately predicted a series of collision times between 19 comet nuclei and Jupiter, based on his self-established numerical model of the solar system dynamics. In the most recent 10 years, he was named as the chief scientist, leading a project of “Construction of Near Earth Object Telescope，” which has been successfully completed. To recognize his contribution in his field, Harvard Smithsonian Observatory in Boston named an asteroid they discovered “Jiaxiang” in 1991. 抄文引用元・出典: フリー百科事典『 ウィキペディア（Wikipedia）』 ■ウィキペディアで「Zhang Jiaxiang」の詳細全文を読む スポンサード リンク
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