Zhang Jiaxiang

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In 1957, Zhang Yuzhe and Zhang Jiaxiang published a paper discussing the orbit of artificial satellites. From 1965 to 1972, Zhang led the project of orbit determination of the first Chinese artificial satellite and thereafter the systematic studies of the orbit of Chinese synchronous satellite. His group discovered more than 150 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. He then served as the chief scientist for the construction of the Near Earth Object Telescope.

In recognition of his contributions, the Center for Astrophysics Harvard & Smithsonian named the asteroid 4760 Jia-xiang after him.

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