On April 29th, 2019, Jaroslaw Grzegorzek, a polish amateur astronomer, discovered a supernova in galaxy Messier 100 when this had a brightness at magnitude of 16.5 mag. Five days after I took this image centered in this magnitude 9.5 mag spiral galaxy at 55 million light-years in constellation Coma Berenices and discoverd by Pierre Méchain in 1718. The supernova is located relatively near of the galaxy core, 15 arcminutes toward Northeast, and its spectrum indicates that its brightness is being fairly reduced because dust clouds in the galaxy.

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