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List of Abell clusters

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The Abell catalogue is a catalogue of approximately 4,000 galaxy clusters with at least 30 members, almost complete to a redshift of z = 0.2. It was originally compiled by the American astronomer George O. Abell in 1958 using plates from POSS, and extended to the southern hemisphere by Abell, Corwin and Olowin in 1987. The name "Abell" is also commonly used as a designation for objects he compiled in a catalogue of 86 planetary nebulae in 1966. The proper designation for the galaxy clusters is ACO, as in "ACO 13", while the planetary-nebula designation is the single letter A, as in "A 39".

1–1999

ACO catalog number	Other names	Member of	Constellation	Right ascension (J2000){{cite web	Declination (J2000)	Abell richness class{{cite web	Bautz–Morgan type	Notes
url = http://ned.ipac.caltech.edu/	title = NASA/IPAC Extragalactic Database	publisher = NASA/IPAC Extragalactic Database (NED)	access-date = March 15, 2012	url = http://vizier.u-strasbg.fr/cgi-bin/VizieR-2?-source=VII/110A	title = The VizieR Catalogue Service	publisher = Strasbourg Astronomical Observatory, UdS/CNRS, Strasbourg, France	access-date = March 15, 2012
13						2	II	ACO 13 is not to be confused with Abell 13, a planetary nebula
85						1	I
133			Cetus			0
209			Cetus			3	II-III
222			Cetus			3	II-III
223			Cetus			3	III
226						1	II
262		Perseus–Pisces Supercluster	Between Andromeda and Triangulum			0	III
263						1
370			Cetus			0	II-III	Exhibits gravitational lensing. The most distant Abell object, at a redshift of 0.375.
383			Eridanus			2	II-III
400			Cetus			1	II-III
401			Aries			2	I
426	Perseus Cluster	Perseus–Pisces Supercluster	Perseus			2	II-III
478			Taurus			2
514						1	II-III
520	Train Wreck Cluster		Orion			3	III
553						0	II
569			Lynx			0	II
576			Lynx			1	III
653			Hydra			1
665			Ursa Major			5	III	The only Abell cluster of richness class 5.{{cite journal
671			Cancer			0	II-III
689			Cancer			0
754			Hydra			2	I-II
779			Lynx
901						1
907			Hydra			1
955						1
966						1	III
1060	Hydra Cluster		Hydra			1	III
1142		Leo Supercluster
1146			Crater			4	I
1185		Leo Supercluster	Ursa Major			1	II
1367	Leo Cluster		Leo			2	II-III
1413			Between Leo and Coma Berenices			3	I	Contains an extremely large cD galaxy.
1631			Corvus			0	I
1656	Coma Cluster		Coma Berenices			2	II
1689			Virgo			4	II-III	One of the biggest and most massive galaxy clusters known; exhibits gravitational lensing.
1795			Boötes			2	I
1835			Virgo			0		Behind it lies a candidate for the furthest known galaxy, "Galaxy Abell 1835 IR1916", seen through gravitational lensing.
1914			Boötes			2	II
1991			Boötes			1	I

2000–4076

ACO catalog number	Other names	Member of	Constellation	Right ascension (J2000)	Declination (J2000)	Abell richness class	Bautz–Morgan type	Notes
2029			Virgo			2	I	Near the Serpens–Virgo border.
2052						0	I-II
2061		Corona Borealis Supercluster	Corona Borealis			1	III
2063		Hercules Superclusters
2065	Corona Borealis Cluster	Corona Borealis Supercluster	Corona Borealis			2	III
2067		Corona Borealis Supercluster	Corona Borealis			1	III
2079		Corona Borealis Supercluster	Corona Borealis
2089		Corona Borealis Supercluster	Corona Borealis
2092		Corona Borealis Supercluster	Corona Borealis
2107		Hercules Superclusters
2124			Corona Borealis			1	I
2142			Corona Borealis			2	II	A merger of two huge galaxy clusters.
2147		Hercules Superclusters	Serpens			1	III
2151	Hercules Cluster	Hercules Superclusters	Hercules			2	III	Major component of the Hercules Superclusters.
2152		Hercules Superclusters				1	III	vauthors=Reichert G, Mason KO, Charles PA, Bowyer S, Lea SM, Pravdo S	title=Low energy X-ray emission from five galaxy cluster sources	journal=Astrophys. J.	date=Aug 1981	volume=247	pages=803–12	bibcode=1981ApJ...247..803R	doi=10.1086/159092 }}
2162		Hercules Superclusters	Corona Borealis
2163			Ophiuchus			2
2199		Hercules Superclusters	Hercules			2	I
2200			Hercules			0
2218			Draco			4	II	Exhibits gravitational lensing.
2256			Ursa Minor			2	II-III
2261			Hercules				I	Part of the Cluster Lensing and Supernova survey with Hubble (CLASH) survey.
2319			Cygnus			1	II-III	Very close to, and possibly extending into, Lyra.
2384			Capricornus			1	II-III
2390			Pegasus			1
2440						0	II
2515			Pegasus	23h 00m 40.9s	+31° 09' 52"	3	II
2589			Pegasus			0	I
2666						0	I
2667			Sculptor			3	I	Exhibits strong gravitational lensing.
2744	Pandora's Cluster		Sculptor			3	III	It seems to have formed from four different clusters involved in a series of collisions over a period of some 350 million years.
3128	Shapley 20 Cluster	Horologium Supercluster				3	I-II
3158	Shapley 17 Cluster	Horologium Supercluster				2	I-II
3192	MCS/MACS J0358.8-2955		Eridanus					Comprises such a huge amount of mass that the galaxy cluster noticeably curves spacetime around it, making it into a gravitational lens. Smaller galaxies behind the cluster appear distorted into long, warped arcs around the cluster’s edges.
3266		Horologium Supercluster	Reticulum			2	I-II
3341						2	II
3363						3	I
3526	Centaurus Cluster	Hydra–Centaurus Supercluster	Centaurus			0	I-II
3558	Shapley 8 Cluster	Shapley Supercluster				4	I
3562		Shapley Supercluster				2	I
3565		Hydra–Centaurus Supercluster				1	I
3574		Hydra–Centaurus Supercluster				0	I
3581		Hydra–Centaurus Supercluster				0	I
3627	Norma Cluster		Norma			1	I
3667			Pavo			2	I-II	10^15 solar masses, bright X-ray source, paired radio relics, likely result of cluster merger
3677			Microscopium					possible member of Microscopium Supercluster
3693			Microscopium					possible member of Microscopium Supercluster
3695		Microscopium Supercluster	Microscopium					gravitationally bound to Abell 3696
3696		Microscopium Supercluster	Microscopium					gravitationally bound to Abell 3695
3705			Microscopium					possible member of Microscopium Supercluster
3854						3	II
4059						1	I

Southern catalogue S1–S1174

ACO catalog number	Other names	Member of	Constellation	Abell richness class	Bautz–Morgan type
S636	Antlia Cluster	Hydra–Centaurus Supercluster	Antlia	0	I-II
S740			Centaurus	0	I-II
S1077			Piscis Austrinus	2	II-III

References

(7 January 2014). "NASA's Hubble and Spitzer Team up to Probe Faraway Galaxies". [[NASA]].
(Aug 1981). "Low energy X-ray emission from five galaxy cluster sources". Astrophys. J..
[http://www.eso.org/public/news/eso1120/ ESO-A Galactic Crash Investigation]
[https://science.nasa.gov/missions/hubble/hubble-views-a-double-cluster-of-glowing-galaxies/ NASA: Hubble Views a Double Cluster of Glowing Galaxies]

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