Clue from people AD 1053 Korean

A comet in the southern sky with a tail over 1 zhang, Korea, 25 February 1053

Goryeosa volume 47, astronomy: '二月乙亥，彗出庫樓，入翼，長丈餘', Munjong year 7, month 2, day yi-hai, about 25 February 1053: a comet appeared in Kulou (Centaurus and Lupus) and moved into Yi (Crater), its tail over 1 zhang. This matters for the 1052 hunch: a comet's tail is an innocent explanation for a 'white vapour', if the same comet was in the northern sky ten weeks earlier.

How it connects

This clue from people argues against The 1052 white vapour matches the 1052 radiocarbon candidate a comet tail could explain a white vapour

This clue from people is a clue for 1052 carbon-14 candidate

This clue from people we read it in Goryeosa (History of Goryeo), original classical Chinese text on Chinese Wikisource: volumes 47 to 49 (astronomy) and 53 to 55 (five elements, the omen sections). Saved in sources/goryeosa_*.txt; dates converted with scripts/lunar_dates.py

This clue from people came from this step Read the Goryeosa ourselves for every target year