Copenhagen, Denmark — 10 December 1855
Unexplained object
An object varying in size from the apparent diameter of the sun to that of a star was visible in the south-western atmosphere for 10 to 12 minutes. It “changed its configuration several times, having appeared now in one mass, then in two, then again in three, and so forth alternately, lighting up the heavens to a considerable distance.”
Source: Copenhagen Faedrelandet, quoted by the Manchester Guardian of 5 January, Case: W414