SN 1986G was a supernova that was observed on May 3, 1986 by Robert Evans. Its host galaxy, Centaurus A, is about 15 million light-years away in the constellation Centaurus. Since Centaurus A is about 15 million light-years away from us, this supernova happened 15 million years ago.^{[citation needed]}

SN 1986G

Event type	Supernova
Ia
Date	May 3, 1986
Constellation	Centaurus
Right ascension	13h 25.6m 40s
Declination	-43° 02' 16"
Epoch	B1950.0
Galactic coordinates	unknown
Distance	about 15,000,000 light-years
Remnant	unknown
Host	Centaurus A (NGC 5128)
Progenitor	unknown
Progenitor type	F9/A0Ia
Colour (B-V)	unknown
Notable features	Only SN in NGC 5128 (so far!)
Peak apparent magnitude	+13.23
Other designations	SN 1986G, AAVSO 1319-42, EV* N5128 V0018
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[edit on Wikidata]

SN 1986G was a bright blue-green star in the middle of the left part of the dust belt of Centaurus A. The blue-green color occurs because David Malin could take the red plate used in this composite image only one year after the supernova occurred, and it had faded away at that time.