SN 1054
Supernova
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SN 1054 is a supernova that was first observed on c. 10 July [O.S. c. 4 July] 1054, and remained visible until c. 12 April [O.S. c. 6 April] 1056.
The event was recorded in contemporary Chinese astronomy, and references to it are also found in a... Wikipedia
Start date: July 4, 1054
Constellation: Taurus
Date: c. 10 July, 1054
Distance: 6.5 kly (2.0 kpc)
Other designations: SN 1054, SN 1054A, CSI+21-05315, PLX 1266, CM Tau
Remnant: Pulsar