|Other designations||SN 2005bc|
|Date||2 April 2005|
|Right ascension||14h 37m 15.050s|
|Declination||+38° 27′ 23.10″|
|Galactic coordinates||Long 66.764500° Lat 65.168763°|
|Distance||about 200,000,000 light-years|
|Progenitor type||White Dwarf|
|Peak apparent magnitude||+15.3|
SN 2005bc was a Type Ia supernova occurring in the Barred spiral galaxy NGC 5698 in the constellation of Boötes. SN 2005bc was discovered on 2 April 2005 by LOSS and independently by Tim Puckett and L. Cox.
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. By mid-May, the supernova had faded to 17th magnitude.
The host galaxy, NGC 5698, along with the supernova lie approximately 200 million light-years (~60 million parsecs) from Earth. This puts the absolute magnitude of the supernova at around −18.6 at maximum, rather faint for a Type Ia event.