NGC 1128

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NGC 1128
3c75.jpg
Binary black hole system 3C 75 contained in the dumbbell shaped galaxy NGC 1128
Observation data (J2000 epoch)
ConstellationCetus
Right ascension02h 57m 41.6s[1]
Declination+06° 01′ 29″[1]
Redshift6940 ± 20 km/s[1]
Distance300 Mly[2]
Apparent magnitude (V)13.8[1]
Characteristics
TypeE0[1]
Apparent size (V)0'.9 × 0'.4[1]
Notable featuresDumbbell-shaped galaxy
Other designations
PGC 11188, 11189[1]

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]

SDSS image of NGC 1128

References[edit]

  1. ^ a b c d e f g "Results for object NGC 1128". NASA/IPAC Extragalactic Database. Retrieved 26 October 2006.
  2. ^ "APOD: 2017 October 22 - Two Black Holes Dancing in 3C 75".
  3. ^ Seligman, Courtney. "Celestial Atlas: NGC Objects: NGC 1100 - 1149". cseligman.com. Archived from the original on 25 July 2015. Retrieved 25 July 2015.

External links[edit]


Coordinates: Sky map 02h 57m 41.6s, +06° 01′ 29″