3C 75

3C 75
Image in radio (pink) and x-ray (cyan) of 3C 75.
Observation data (J2000 epoch)
Constellation	Cetus
Right ascension	02h 57m 42.63s[1]
Declination	+06° 01′ 04.8″
Redshift	0.0231[2]
Distance	296 Mly[2][3]
Apparent magnitude (V)	+13.93
Characteristics
Type	Active binary
Apparent size (V)	0.741″ × 0.489″
Other designations
MCG+01-08-027, NGC 1128

3C 75 (also called 3C75) is a binary black hole system in the dumbbell-shaped galaxy NGC 1128 in the galaxy cluster Abell 400. It has four relativistic jets, two coming from each accreting supermassive black hole. It is travelling at 1200 kilometers per second, causing the jets to be swept back. 3C 75 may be X-ray source 2A 0252+060 (1H 0253+058, XRS 02522+060).^[4]

• What is known about 3C 75
• Binary Black Hole in 3C 75. Astronomy Picture of the Day. 2010 March 14
• NRAO press release
• Visible image of 3C75 binary
• Merritt, David; Milosavljevic, Milos (2005). "Massive Black Hole Binary Evolution". Living Reviews in Relativity. 8: 8. arXiv:astro-ph/0410364. Bibcode:2005LRR.....8....8M. doi:10.12942/lrr-2005-8 (inactive 1 July 2025). S2CID 17677725.{{cite journal}}: CS1 maint: DOI inactive as of July 2025 (link)
• Simbad MCG+B01-08-027

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