A Revisit to the Guest Star of A.D. 185

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Science  02 Jan 1987:
Vol. 235, Issue 4784, pp. 59-60
DOI: 10.1126/science.235.4784.59


The guest star of A.D. 185 is possibly the earliest recorded supernova, and the radio source RCW 86 is believed to be its remnant. However, a restudy of ancient Chinese literature suggests that RCW 86 is unrelated to the guest star, which probably had a visible duration of only 7 months and appeared between β and δ Centauri, instead of the previously proposed 20-mtonth duration and a location between α and ,β Centauri.