Page "S Andromedae" Paragraph 10

The location of the supernova event was 16 ″ from the relatively bright nucleus of the galaxy.

This made detection of the supernova remnant difficult, and multiple attempts proved unsuccessful.

Finally, in 1988, astronomer R. A. Fesen and others using the 4-meter Mayall telescope at Kitt Peak discovered the iron-rich remnant of the explosion.

Further observations were made with the Hubble Space Telescope in 1995.