|Right ascension||12h 01m 50.37s |
|Declination||−18° 52′ 12.7″ |
|Galactic coordinates||286.9460 +42.4568 (34" W, 10" S)|
|Distance||63 Mly (19.2 Mpc) |
|Peak apparent magnitude||14.9 |
|Other designations||SN 2004gt|
SN 2004GT was a type Ic supernova that happened in the interacting galaxy NGC 4038 on December 12, 2004. The event occurred in a region of condensed matter in the western spiral arm.  The progenitor was not identified from older images of the galaxy, and is either a type WC Wolf-Rayet star with a mass over 40 times that of the Sun, or a star 20 to 40 times as massive as the Sun in a binary star system.