https://wis-tns.weizmann.ac.il/object/2020nvb
Spotted 4 hours ago by Koichi Itagaki at an already surprisingly bright mag 13 C . A tough one from the UK but better further south, Spain perhaps ?
Robin
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Another bright possible supernova (NGC4457)
Wed, 2020-07-01 17:30
#1
Another bright possible supernova (NGC4457)
Now also confirmed as a Ia and so could reach mag 12 or perhaps even a bit brighter at this distance depending on extinction