國際天文聯會彗星軌道數據表
https://www.minorplanetcenter.net/iau/MPCORB/CometEls.txt
https://www.minorplanetcenter.net/iau/MPCORB/CometEls.txt?fbclid=IwAR20xgy4ofyufYGYb9iHpLF3SlnVVIlOGo_M5rJ3ds4gj5oMFpLjYapIq5s_aem_AbzMtjNslLFvdIaf_n9AuvQC5_px9D8bLS4Q-HvQCku9z0VYCVeh7G1FiF6RO5PApVU
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