NGC 1128

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NGC 1128
Observation data (J2000 epoch)
Right ascension	2h 57m 41.6s[1]
Declination	+6° 01′ 29″[1]
Redshift	6940 ± 20 km/s[1]
Type	E0[1]
Apparent dimensions (V)	0'.9 × 0'.4[1]
Apparent magnitude (V)	13.8[1]
Notable features	Dumbbell-shaped galaxy
Other designations
PGC 11188[1]
See also: Galaxy, List of galaxies

NGC 1128 is a "dumbbell galaxy" in the Abell 400 galaxy cluster. It is the center of the 3C75 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. However, there is a possible 5 min error in Swift's records that casts some doubt on his discovery.^{[citation needed]}

[edit] External links

• Black Holes Dance With Incredible Violence (SpaceDaily) Apr 12, 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)

[edit] References