- Source: SN 2004dj
SN 2004dj was the brightest supernova since SN 1987A at the time of its discovery.
This Type II-P supernova was discovered by Koichi Itagaki, a Japanese astronomer on July 31, 2004. At the time of its discovery, its apparent brightness was 11.2 visual magnitude; the discovery occurred after the supernova had reached its peak magnitude. The supernova's progenitor is a star in a young, compact star cluster in the galaxy NGC 2403, in Camelopardalis. The cluster had been cataloged as the 96th object in a list of luminous stars and clusters by Allan Sandage in 1984; the progenitor is therefore commonly referred to as Sandage 96. This cluster is easily visible in a Kitt Peak National Observatory image and appears starlike.
External links
Light curves and spectra on the Open Supernova Catalog
supernovae.net image collection
NASA Astronomy Picture of the Day: Cropped and rotated HST photograph (7 September 2004)
Bright Supernova page on 2004dj
