NGC 1128 explained

NGC 1128
Epoch:	J2000
Ra:	^[1]
Constellation Name:	Cetus
Z:	6940 ± 20 km/s
Dist Ly:	300 Mly^[2]
Type:	E0
Appmag V:	13.8
Size V:	0'.9 × 0'.4
Notes:	Dumbbell-shaped galaxy
Names:	PGC 11188, 11189

NGC 1128 is a dumbbell galaxy in the Abell 400 galaxy cluster. At the center of the galaxy is 3C 75, a radio source, and contains two orbiting supermassive black holes that may be merging. Computer simulations indicate that these two black holes will gradually spiral in toward each other until they merge. Lewis Swift is credited with the discovery of NGC 1128 in 1886.^[3]

External links

• • Black Holes Dance With Incredible Violence (SpaceDaily) 12 April 2006
• 3C 75 in Abell 400: Black Holes Determined to be Bound (Chandra AXAF)
• More Images of 3C 75 in Abell 400 (Chandra AXAF)
  • NGC 1128 (jpeg, Chandra AXAF)

Notes and References

1. Web site: Results for object NGC 1128 . NASA/IPAC Extragalactic Database . 26 October 2006.
2. Web site: APOD: 2017 October 22 – Two Black Holes Dancing in 3C 75.
3. Web site: Seligman . Courtney . Celestial Atlas: NGC Objects: NGC 1100–1149 . cseligman.com . 25 July 2015 . https://web.archive.org/web/20150725124451/http://cseligman.com/text/atlas/ngc11.htm#1128 . 25 July 2015 . dead .