Downgraded and updated rows
The 5 BC star was a comet. The 369, 386, 393 and 837 guest stars are now argued to be novae, an astrophysics question, so parked. The 1458 eruption is two eruptions. The 1831 eruption is solved. The Younger Dryas platinum spike is volcanic.
How it connects
This step led us to
Younger Dryas trigger, 12,800 years ago
This step led us to
5 BC broom star
This step led us to
369 guest star
This step and then
Built this board
This step came after
Checked the Yuan and Ming catalogue