Text #48Cometography: A Catalog of Comets. Series: Cometography. Vol. 1 .
The Chinese text Han shu (100) is the oldest text to report this “long-tailed star.” It says the comet was seen “in the eastern quarter of the sky” sometime during -171. The Han shu was generally written in a chronological style and this account follows events that occurred during the spring and summer.