Abstract
I have re-examined the records in the Chinese“Standard Histories”on this famous object, including one set of relatively precise observations made in the year 837 A.D., which has only recently become available in an English translation (Ho 1962). This set, when properly interpreted, consists of the comet’s right ascension on 10 specified dates, given to the nearest half of a Chinese degree (1 Chinese degree = 360°/365.25). While the records of the other returns are not so precise, they can nevertheless be used with great advantage to determine the time of perihelion passage. These records provide an almost complete coverage back to the year 240 B.C.
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