Reply To: Supernova in M101 ! › Forums › Variable Stars › Supernova in M101 ! › Reply To: Supernova in M101 ! 27 May 2023 at 11:12 am #617542 Robin LeadbeaterParticipant So B mag peaked in just 5 days from the explosion on the 18th. That’s pretty fast I think, even for a type II
