SN 2004dj

SN 2004dj
Observation data (Epoch J2000.0)
Supernova type	II-P
Remnant type	Nebula
Host galaxy	NGC 2403
Constellation	Camelopardalis
Right ascension	07^h 37^m 17.044^s
Declination	+65° 35′ 57.84″
Galactic coordinates	?
Discovery date	31 July 2004 18:15 UTC
Peak magnitude (V)	+11.2
Distance	about 11,000,000 light-years
Physical characteristics
Progenitor	Unknown star in compact cluster Sandage 96
Progenitor type	Supergiant
Colour (B-V)	Unknown
Notable features	Light Curves

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

• supernovae.net image collection
• NASA Astronomy Picture of the Day: Cropped and rotated HST photograph (7 September 2004)
• Bright Supernova page on 2004dj