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Purple Mountain Observatory (), also known as Zijinshan Astronomical Observatory, is an astronomical observatory located on the Purple Mountain in Nanjing, China. The longtime director of the observatory (from 1950 to 1984) was Zhang Yuzhe (张钰哲) (Y. C. Chang). The observatory discovered the periodic comets 60P/Tsuchinshan and 62P/Tsuchinshan, and also the non-periodic C/1977 V1 (Tsuchinshan), also known as Comet 1977 X. Many asteroids were also discovered at the observatory, including the Trojan asteroids 2223 Sarpedon, 2260 Neoptolemus, 2363 Cebriones, 2456 Palamedes, as well as the eponymous 3494 Purple Mountain. ==Near-Earth Object Survey== The Chinese Near-Earth Object Survey (CNEOS), based at Xuyi Observation Station,〔(【引用サイトリンク】url=http://english.pmo.cas.cn/rh/dcm/xscm/200908/t20090822_33657.html )〕 started observations in 2006. It uses a 1:04=1:20=1:80 m Schmidt telescope equipped with a 4K by 4K CCD detector with drift-scanning function. Up to August 2012, the program observed 149,971 asteroids, found 1,279 new provisional designation asteroids, and cataloged 251 numbered asteroids (including five Jupiter Trojans, two Hildas, and one Phocaea). The program has obtained 824 Near-Earth Object (NEO) position observations and found four new NEOs, including one Apollo type NEO - 2007 JW2 - and three Amor type NEOs - 2009 MZ6, 2007 RT147, and 2007 QX14.〔(【引用サイトリンク】url=http://www.iau.org/public/themes/neo/nea2/ )〕 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「Purple Mountain Observatory」の詳細全文を読む スポンサード リンク
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