SN 2005bc was a Type Ia supernova[3] occurring in the barred spiral galaxy NGC 5698,[1] located in the northern constellation of Boötes.

SN 2005bc was discovered on 2 April 2005 by LOSS and independently by Tim Puckett and L.

[4] It was positioned at an offset of 4.6″ east and 7.5″ north of the galactic nucleus.

[1] The supernova was at magnitude 16.4 at discovery, and quickly rose to a peak magnitude of around 15.3 (in visible light) just over a week after discovery.

[2] As the supernova was of Type Ia, its progenitor star was a compact white dwarf star that exceeded the Chandrasekhar limit.