Eta Carinae / Argus
https://en.wikipedia.org/wiki/Eta_Carinae
-Eruptions:
--1827: William John Burchell notes Eta Carinae brighter than usual
--1830s: John Herschel tracks the brightness of EC from South Africa, noting that it outshone Rigel in 1837, and was even brighter in 1838
--1843: March 11th to 14th, Peak Brightness