SN 2004dj

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SN 2004dj
Supernova 2004dj.jpg
Observation data (Epoch J2000.0)
Supernova type II-P
Remnant type Nebula
Host galaxy NGC 2403
Constellation Camelopardalis
Right ascension 07h 37m 17.044s
Declination +65° 35′ 57.84″
Galactic coordinates ?
Discovery date 31 July 2004 18:15 UTC [1]
Peak magnitude (V) +11.2
Distance about 11,000,000 light-years [2]
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.

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