Pulled the table the search engines could not see
Search summaries said no aurora record exists for 1052. The Hayakawa 2015 catalogue is a PDF; extracted its text and read Table 2 directly. Found the 13 December 1052 white vapour to the north at Kaifeng. Lesson recorded as a working rule: always pull the primary tables.
How it connects
This step led us to
The 1052 white vapour matches the 1052 radiocarbon candidate
This step led us to
White vapour to the north, Kaifeng, 13 December 1052
This step and then
Checked the Yuan and Ming catalogue
This step came after
Verification pass