Centaurus A

NGC 5128 was discovered on 29 April 1826 by James Dunlop during a survey at the Parramatta Observatory.{{Cite journal |last1=Robertson |first1=Peter |last2=Cozens |first2=Glen |last3=Orchiston |first3=Wayne |last4=Slee |first4=Bruce |last5=Wendt |first5=Harry |date=2010 |title=Early Australian Optical and Radio Observations of Centaurus A |url=https://www.cambridge.org/core/product/identifier/S1323358000000503/type/journal_article |journal=Publications of the Astronomical Society of Australia |language=en |volume=27 |issue=4 |pages=402–430 |arxiv=1012.5137 |bibcode=2010PASA...27..402R |doi=10.1071/AS09071 |issn=1323-3580 |s2cid=54580482}}{{Cite journal |last=Dunlop |first=James |date=1828-12-31 |title=A catalogue of nebulæ and clusters of stars in the southern hemisphere, observed at Paramatta in New South Wales, … |journal=Philosophical Transactions of the Royal Society of London |language=en |volume=118 |pages=113–151 |doi=10.1098/rstl.1828.0010 |issn=0261-0523 |doi-access=free}}

Centaurus A is listed on p. 138 as entry number 482. A sketch of Centaurus A appears as Fig. 20 on the plate between pages 114 and 115.

In 1847 John Herschel described the galaxy as "two semi-ovals of elliptically formed nebula appearing to be cut asunder and separated by a broad obscure band parallel to the larger axis of the nebula, in the midst of which a faint streak of light parallel to the sides of the cut appears."{{Cite book |last=Herschel |first=John F. W. |author-link=John Herschel |url=https://archive.org/details/outlinesofastron00hersuoft/mode/2up |title=Outlines of astronomy |date=1878 |publisher=London Longmans, Green |isbn=978-1-108-01377-2 |edition=1 |pages=602 |doi=10.1017/cbo9780511709111}}

In 1949 John Gatenby Bolton, Bruce Slee and Gordon Stanley localized NGC 5128 as one of the first extragalactic radio sources.{{cite journal

|author1=J. G. Bolton |author2=G. J. Stanley |author3=O. B. Slee |title=Positions of Three Discrete Sources of Galactic Radio-Frequency Radiation

|journal=Nature

|volume=164

|issue=4159

|date=1949

|pages=101–102 |doi=10.1038/164101b0|bibcode = 1949Natur.164..101B |s2cid=4073162 }} Five years later, Walter Baade and Rudolph Minkowski suggested that the peculiar structure is the result of a merge event of a giant elliptical galaxy and a small spiral galaxy.{{cite journal|title=On the Identification of Radio Sources.|first1=W.|last1=Baade|first2=R.|last2=Minkowski|date=1 January 1954|journal=Astrophysical Journal|volume=119|pages=215|via=NASA ADS|doi=10.1086/145813|bibcode=1954ApJ...119..215B}} The first detection of X-ray emissions, using a sounding rocket, was performed in 1970.{{cite journal

|author1=C. S. Bowyer |author2=M. Lampton |author3=J. Mack |author4=F. de Mendonca |title=Detection of X-Ray Emission from 3C 273 and NGC 5128

|journal=Astrophysical Journal

|volume=161

|date=1970

|doi=10.1086/180559 |bibcode=1970ApJ...161L...1B |page=L1|url=http://urlib.net/8JMKD3MGP3W34P/3L6DNS2 }} In 1975–76 gamma-ray emissions from Centaurus A were observed through the atmospheric Cherenkov technique.{{cite journal|title=Evidence for the detection of gamma rays from Centaurus A at gamma-ray energies above 300 GeV|first1=J. E.|last1=Grindlay|first2=H. F.|last2=Helmken|first3=R. H.|last3=Brown|first4=J.|last4=Davis|first5=L. R.|last5=Allen|date=1 April 1975|journal=Astrophysical Journal Letters|volume=197|pages=L9–L12NASA ADS|doi=10.1086/181764|bibcode=1975ApJ...197L...9G}}

The Einstein Observatory detected an X-ray jet emanating from the nucleus in 1979.{{cite journal

|author1=E. J. Schreier |author2=E. Feigelson |author3=J. Delvaille |author4=R. Giacconi |author5=D. A. Schwartz |title=EINSTEIN Observations of The X-Ray Structure of Centaurus A: Evidence For The Radio-Lobe Energy Source

|journal=Astrophysical Journal, Part 2

|volume=234

|date=1979

|pages=39–43

|doi=10.1086/183105 |bibcode=1979ApJ...234L..39S|doi-access=free}} Ten years later, young blue stars were found along the central dust band with the Hubble Space Telescope.{{cite web

|title=HubbleSite – NewsCenter – Hubble Provides Multiple Views of How to Feed a Black Hole (05/14/1998) – Background Info

|url=http://hubblesite.org/newscenter/archive/releases/1998/14/background/

|access-date=14 October 2015

|archiveurl=https://web.archive.org/web/20071030030708/http://hubblesite.org/newscenter/archive/releases/1998/14/background/

|archivedate=2007-10-30}}

The Chandra X-ray Observatory identified in 1999 more than 200 new point sources.{{cite journal

|author1=R. P. Kraft |author2=J. M. Kregenow |author3=W. R. Forman |author4=C. Jones |author5=S. S. Murray |title=Chandra Observations of the X-Ray Point Source Population in Centaurus A

|journal=Astrophysical Journal

|volume=560

|issue=2

|date=20 October 2001

|pages=675–688

|doi=10.1086/323056

|bibcode=2001ApJ...560..675K|doi-access=

}} Another space telescope, the Spitzer Space Telescope, found a parallelogram-shaped structure of dust in near infrared images of Centaurus A in 2006.{{cite journal

|author1=Alice C. Quillen |author2=Mairi H. Brookes |author3=Jocelyn Keene |author4=Daniel Stern |author5=Charles R. Lawrence |title=Spitzer Observations of the Dusty Warped Disk of Centaurus A

|journal=Astrophysical Journal

|volume=645 Nummer = 2

|issue=2 |date=10 July 2006

|pages=1092–1101

|doi=10.1086/504418

|bibcode=2006ApJ...645.1092Q|arxiv = astro-ph/0601135 |s2cid=18443587 }}

Evidence of gamma emissions with very high energy (more than 100 GeV) was detected by the H.E.S.S-Observatorium in Namibia in 2009.{{cite journal

|author1=F. Aharonian |author2=A. G. Akhperjanian |author3=G. Anton |author4=U. Barres de Almeida |author5=A. R. Bazer-Bachi |title=DISCOVERY OF VERY HIGH ENERGY γ-RAY EMISSION FROM CENTAURUS A WITH H.E.S.S.

|journal=Astrophysical Journal

|volume=695

|issue=1

|date=10 April 2009

|pages=L40–L44

|doi=10.1088/0004-637x/695/1/l40

|bibcode=2009ApJ...695L..40A|arxiv = 0903.1582 |s2cid=18160745 }}

The following year, Centaurus A was identified as a source of cosmic rays of highest energies, after years of observations by Pierre Auger Observatory.{{cite journal

|author1=J. Abraham |author2=P. Abreu |author3=M. Aglietta |author4=C. Aguirre |author5=D. Allard |title=Correlation of the highest-energy cosmic rays with the positions of nearby active galactic nuclei

|journal=Astroparticle Physics

|volume=29

|issue=3

|date=1 April 2008

|pages=188–204

|doi=10.1016/j.astropartphys.2008.01.002

|arxiv = 0712.2843 |bibcode = 2008APh....29..188P }} In 2016 a review of data from Chandra and XMM-Newton, unusual high flares of energy were found in NGC 5128 and the galaxy NGC 4636. Jimmy Irwin of University of Alabama hypothesized the discovery as potentially a black hole in a yet unknown process or an intermediate-mass black hole.{{citation needed|date=December 2020}}

Centaurus A may be described as having a peculiar morphology. As seen from Earth, the galaxy looks like a lenticular or elliptical galaxy with a superimposed dust lane.{{cite book

| author=A. Sandage | author2=J. Bedke

| date=1994

| title=Carnegie Atlas of Galaxies

| publisher=Carnegie Institution of Washington

| location=Washington, D.C.

| isbn=978-0-87279-667-6}} The peculiarity of this galaxy was first identified in 1847 by John Herschel, and the galaxy was included in Halton Arp's Atlas of Peculiar Galaxies (published in 1966) as one of the best examples of a "disturbed" galaxy with dust absorption.{{cite journal

| author=H. Arp

| title=Atlas of Peculiar Galaxies

| journal=Astrophysical Journal Supplement

| date=1966

| volume=14

| pages=1–20

| bibcode=1966ApJS...14....1A | doi=10.1086/190147

}} The galaxy's strange morphology is generally recognized as the result of a merger between two smaller galaxies.{{cite journal

| author=W. Baade | author2=R. Minkowski

| title=On the Identification of Radio Sources

| journal=Astrophysical Journal

| date=1954

| volume=119

| pages=215–231

| bibcode=1954ApJ...119..215B

| doi=10.1086/145813}}

File:Centaurus A EN.webm

File:StuctureCenA-EN.png

The bulge of this galaxy is composed mainly of evolved red stars. The dusty disk, however, has been the site of more recent star formation; over 100 star formation regions have been identified in the disk.{{cite journal

| author=P. W. Hodge | author2=R. C. Kennicutt Jr.

| title=An atlas of H II regions in 125 galaxies

| journal=Astrophysical Journal

| date=1982

| volume=88

| pages=296–328

| bibcode=1983AJ.....88..296H

| doi=10.1086/113318}}

File:Supernova 1986 G in the peculiar, southern galaxy Centaurus A (NGC 5128) (eso8608a).jpgTwo supernovae have been detected in Centaurus A.{{cite web

| title=NASA/IPAC Extragalactic Database

| work=Results for extended name search on Centaurus A

| url=http://nedwww.ipac.caltech.edu/

| access-date=7 March 2007}}

The first supernova, named SN 1986G, was discovered within the dark dust lane of the galaxy by Robert Evans on 3 May 1986.{{cite journal

| author=R. Evans | author2=R. H. McNaught | author3=C. Humphries

| title=Supernova 1986G in NGC 5128

| journal=IAU Circular

| date=1986

| pages=1

| volume=4208

| bibcode=1986IAUC.4208....1E

}}

It was later identified as a Type Ia supernova,{{cite journal

| author=M. M. Phillips | display-authors=4 | author2=A. C. Phillips | author3=S. R. Heathcote | author4=V. M. Blanco | author5=D. Geisler | author6=D. Hamilton | author7=N. B. Suntzeff | author8=F. J. Jablonski | author9=J. E. Steiner | author10=A. P. Cowley | author11=P. Schmidtke | author12=S. Wyckoff | author13=J. B. Hutchings | author14=J. Tonry | author15=M. A. Strauss | author16=J. R. Thorstensen | author17=W. Honey | author18= J. Maza | author19= M. T. Ruiz | author20= A. U. Landolt | author21= A. Uomoto | author22=R. M. Rich | author23=J. E. Grindlay | author24= H. Cohn | author25=H. A. Smith | author26=J. H. Lutz | author27=R. J. Lavery | author28=A. Saha

| title=The type 1a supernova 1986G in NGC 5128 – Optical photometry and spectra

| journal=Publications of the Astronomical Society of the Pacific

| date=1987

| volume=99

| pages=592–605

| bibcode=1987PASP...99..592P | doi=10.1086/132020| doi-access= }}

which forms when a white dwarf's mass grows large enough to ignite carbon fusion in its center, touching off a runaway thermonuclear reaction, as may happen when a white dwarf in a binary star system strips gas away from the other star. SN 1986G was used to demonstrate that the spectra of type Ia supernovae are not all identical, and that type Ia supernovae may differ in the way that they change in brightness over time.

The second supernova, designated SN 2016adj,{{cite web|url=http://www.virtualtelescope.eu/2016/02/09/supernova-sn-2016adj-in-the-peculiar-galaxy-ngc-5128-centaurus-a-9-feb-2016/|title=Supernova SN 2016adj in the peculiar galaxy NGC 5128 ("Centaurus A") – 9 Feb. 2016 – The Virtual Telescope Project 2.0|date=9 February 2016}} was discovered by Backyard Observatory Supernova Search in February 2016 and was initially classified as a Type II supernova based on its H-alpha emission line.{{cite web|url=http://www.astronomerstelegram.org/?read=8651|title=ATel #8651: Bright PSN in NGC5128 (Centaurus A) Discovered By Backyard Observatory Supernova Search (BOSS)|website=ATel}}{{cite web|url=http://www.astronomerstelegram.org/?read=8655|title=ATel #8655: Tentative Spectroscopic Classification of Bright PSN in NGC 5128 (Centaurus A)|website=ATel}}

A subsequent classification found the spectrum best resembled the Type Ib core-collapse supernova 1999dn.{{cite web|url=http://www.astronomerstelegram.org/?read=8657|title=ATel #8657: CSP Spectroscopic Classification of AT 2016adj in NGC 5128 (Centaurus A)|website=ATel}} (See Type Ib and Ic supernovae).

In addition to these supernovae, a luminous red nova, designated AT{{nbsp}}2020nqq (type ILRT, mag. 17.8), was discovered on 27 June 2020.{{cite web | website=Transient Name Server | title=AT{{nbsp}}2020nqq | url=https://www.wis-tns.org/object/2020nqq | publisher = IAU | access-date=5 September 2024}}

Centaurus A is close enough that classical novae can also be detected. The first confirmed nova in this galaxy was discovered by BlackGEM at magnitude 18.47 on 23 December 2024, and designated AT 2024aeql.{{cite web | website=Transient Name Server | title=AT{{nbsp}}2024aeql | url=https://www.wis-tns.org/object/2024aeql | publisher = IAU | access-date=24 December 2024}}

Distance estimates to Centaurus A established since the 1980s typically range between 3–5 Mpc. Classical Cepheids discovered in the heavily obscured dust lane of Centaurus A yield a distance between ~3–3.5 Mpc, depending on the nature of the extinction law adopted and other considerations.{{cite journal | author = Ferrarese Laura | display-authors = 4 | author2 = Mould Jeremy R. | author3 = Stetson Peter B. | author4 = Tonry John L. | author5 = Blakeslee John P. | author6 = Ajhar Edward A. | date =2007 | title = The Discovery of Cepheids and a Distance to NGC 5128 | doi = 10.1086/506612 | bibcode=2007ApJ...654..186F | journal = Astrophysical Journal | volume = 654 | issue = 1| pages = 186–218 |arxiv = astro-ph/0605707 | s2cid = 17895798 }}{{cite journal|bibcode=2010AcA....60..121M|author1=Majaess, D.|date=2010|pages=121|volume=60 |issue=2|title=The Cepheids of Centaurus A (NGC 5128) and Implications for H0 |journal=Acta Astronomica|arxiv = 1006.2458 }} Mira variables{{cite journal |bibcode=2004A&A...413..903R |title=The distance to the giant elliptical galaxy NGC 5128 |journal=Astronomy and Astrophysics|arxiv = astro-ph/0310639 |doi = 10.1051/0004-6361:20034031 |date=2004 |last1=Rejkuba |first1=M. |volume=413 |issue=3 |pages=903–912 |s2cid=15938660 }} and Type II Cepheids were also discovered in Centaurus A, the latter being rarely detected beyond the Local Group.{{cite journal |author1=Majaess, D. |bibcode=2009AcA....59..403M |date=2009 |author2=Turner, D. |page=403 |author3=Lane, D. |title=Type II Cepheids as Extragalactic Distance Candles |volume=59 |issue=4 |journal=Acta Astronomica|arxiv = 0909.0181 }} The distance to Centaurus A established from several indicators such as Mira variables and planetary nebulae favour a more distant value of ~3.8 Mpc.{{cite journal |bibcode=2010PASA...27..475H |author1=Harris, Gretchen L. H. |doi=10.1071/AS09063 |title=NGC 5128: The Giant Beneath |date=2010 |pages=475–481 |issue=4 |volume=27 |journal=Publications of the Astronomical Society of Australia|arxiv = 1004.4907 |s2cid=118604663 }}{{cite journal |doi=10.1071/AS09061 |last1=Harris |arxiv=0911.3180 |first1=Gretchen L. H. |last2=Rejkuba |first2=Marina |last3=Harris |first3=William E. |title=The Distance to NGC 5128 (Centaurus A) |journal=Publications of the Astronomical Society of Australia |volume=27 |issue=4 |pages=457–462 |date=2010|bibcode = 2010PASA...27..457H |s2cid=16912328 }}

Centaurus A is at the center of one of two subgroups within the Centaurus A/M83 Group, a nearby group of galaxies.{{cite journal

| author=I. D. Karachentsev | display-authors=4 | author2=M. E. Sharina | author3=A. E. Dolphin | author4=E. K. Grebel | author5=D. Geisler | author6=P. Guhathakurta | author7=P. W. Hodge | author8=V. E. Karachetseva | author9=A. Sarajedini | author10=P. Seitzer

| title=New distances to galaxies in the Centaurus A group

| journal=Astronomy and Astrophysics

| date=2002

| volume=385

| issue=1

| pages=21–31

| bibcode=2002A&A...385...21K | doi=10.1051/0004-6361:20020042

| doi-access=free }} Messier 83 (the Southern Pinwheel Galaxy) is at the center of the other subgroup. These two groups are sometimes identified as one group{{cite book

| author=R. B. Tully

| date=1988

| title=Nearby Galaxies Catalog

| publisher=Cambridge University Press

| location=Cambridge

| isbn=978-0-521-35299-4}}{{cite journal

| author=P. Fouque | author2=E. Gourgoulhon | author3=P. Chamaraux | author4=G. Paturel

| title=Groups of galaxies within 80 Mpc. II – The catalogue of groups and group members

| journal=Astronomy and Astrophysics Supplement

| date=1992

| volume=93

| pages=211–233

| bibcode=1992A&AS...93..211F

}} and sometimes identified as two groups.{{cite journal

| author=A. Garcia

| title=General study of group membership. II – Determination of nearby groups

| journal=Astronomy and Astrophysics Supplement

| date=1993

| volume=100

| pages=47–90

| bibcode=1993A&AS..100...47G}} However, the galaxies around Centaurus A and the galaxies around M83 are physically close to each other, and both subgroups appear not to be moving relative to each other.{{cite journal

| author=I. D. Karachentsev

| title=The Local Group and Other Neighboring Galaxy Groups

| journal=Astronomical Journal

| date=2005

| volume=129

| issue=1

| pages=178–188

| bibcode=2005AJ....129..178K | doi=10.1086/426368

|arxiv = astro-ph/0410065 | s2cid=119385141

}} The Centaurus A/M83 Group is located in the Virgo Supercluster.{{cn|date=April 2021}}

In addition to dwarf galaxies, Centaurus A, like most galaxies, has a population of globular clusters. Some objects that appear to be globular clusters are hypothesized to be the tidally stripped cores of former galaxies. The most extreme example is the object VHH81-01, whose central black hole is estimated to be around {{solar mass|{{val|8e5}}}}.{{cite journal|doi=10.3847/1538-4357/ac551c|title=A Population of Luminous Globular Clusters and Stripped Nuclei with Elevated Mass to Light Ratios around NGC 5128 |year=2022 |last1=Dumont |first1=Antoine |last2=Seth |first2=Anil C. |last3=Strader |first3=Jay |last4=Voggel |first4=Karina |last5=Sand |first5=David J. |last6=Hughes |first6=Allison K. |last7=Caldwell |first7=Nelson |last8=Crnojević |first8=Denija |last9=Mateo |first9=Mario |last10=Bailey |first10=John I. |last11=Forbes |first11=Duncan A. |journal=The Astrophysical Journal |volume=929 |issue=2 |page=147 |arxiv=2112.04504 |bibcode=2022ApJ...929..147D |s2cid=245005855 |doi-access=free }}

{{wide image|RadioCenA-EN.png|600px|Overview over the radio structure of Centaurus A. The whole radio emitting region extends about 1.8 million light years (about 8° degrees in the sky). Through observations with the VLBI technique structures of the jet and the core smaller than a light year could be resolved (corresponding to a resolution of 0.68 x 0.41 milli-arcseconds.{{cite journal|author1=Roopesh Ojha |author2=M. Kadler |author3=M. Böck |author4=R. Booth |author5=M. S. Dutka |title=TANAMI: Milliarcsecond Resolution Observations of Extragalactic Gamma-ray Sources |journal=2009 Fermi Symposium |date=30 December 2009 |arxiv=1001.0059|bibcode = 2010arXiv1001.0059O }}) }}

File:CentaurusA VR37 hi.tif

In July 2021 the Event Horizon Telescope released a resolved image of Centaurus A showing the jet coming from the black hole at its center.

Centaurus A is located approximately 4° north of Omega Centauri (a globular cluster visible with the naked eye). Because the galaxy has a high surface brightness and relatively large angular size, it is an ideal target for amateur astronomy observations. The bright central bulge and dark dust lane are visible even in finderscopes and large binoculars, and additional structure may be seen in larger telescopes. Claims have been made that Centaurus A is visible to the naked eye under exceptionally good conditions.{{cite web|url=http://astronomy-mall.com/Adventures.In.Deep.Space/aintno.htm|title=Aintno Catalog|website=astronomy-mall.com}}

Centaurus A halo.jpg|Wide field view of Centaurus A showing its extended halo of stars

Radio galaxy Centaurus A by ALMA.jpg|The radio galaxy Centaurus A, as seen by ALMA

CentaurusA3.jpg|The heavily obscured inner (barred?) spiral disk at 24 μm as shown by the Spitzer IR telescope

NGC 5128.jpg|Chandra X-ray view of Cen A in X-rays showing one relativistic jet from the central black hole

Firestorm of Star Birth in Galaxy Centaurus A.jpg|"Hubble's panchromatic vision... reveals the vibrant glow of young, blue star clusters..."{{cite web|title=Firestorm of Star Birth in Galaxy Centaurus A|url=http://www.nasa.gov/multimedia/imagegallery/image_feature_2192.html|publisher=NASA |date=March 7, 2012|access-date=27 September 2012}}

CenA-nearIR.jpg|Image of the central parts of Centaurus A showing the parallelogram-shaped remains of a smaller galaxy that was absorbed about 200 to 700 million years ago

Centauros a-spc.png|"False-colour image of Centaurus A, showing radio (red), 24-micrometre infrared (green) and 0.5–5 keV X-ray emission (blue)

CentaurusA Center EN.PNG|Central part of the galaxy

Centaurus A jets.ogv|Video about Centaurus A jets

Centaurus a Mark Johnston.jpg|Amateur astronomer photo of Centaurus A

• Messier 87 – a giant elliptical galaxy that is also a strong radio source
• NGC 1316 – a similar lenticular galaxy that is also a strong radio source
• NGC 1106 - another lenticular galaxy with an active galactic nucleus

{{Reflist|30em}}

• STScI. [http://hubblesite.org/newscenter/newsdesk/archive/releases/1998/14/text/ Hubble Provides Multiple Views of How to Feed a Black Hole]. Press release: Space Telescope Science Institute. 14 March 1998.
• Chandra X-Ray Observatory Photo Album [http://chandra.harvard.edu/photo/2003/cenajet/ Centaurus A Jet]

{{Commons category}}

• [http://www.extragalactic.info/cena/cen-a-home.html Sarka Wykes Centaurus A project] {{Webarchive|url=https://web.archive.org/web/20170706220818/http://www.extragalactic.info/cena/cen-a-home.html |date=6 July 2017 }}
• [http://messier.seds.org/xtra/ngc/n5128.html SEDS: Peculiar Galaxy NGC 5128]
• [http://www.spacetelescope.org/images/archive/freesearch/5128/viewall/1 ESA/Hubble images of Centaurus A]
• [http://apod.gsfc.nasa.gov/apod/ap030705.html NASA's APOD: X-Rays from an Active Galaxy (July 5, 2003)]
• [http://apod.gsfc.nasa.gov/apod/ap060304.html NASA's APOD: The Galaxy Within Centaurus A (March 4, 2006)]
• [https://apod.nasa.gov/apod/ap180712.html NASA's APOD: Centaurus A (July 12, 2018)]
• [https://apod.nasa.gov/apod/ap230503.html NASA's APOD: Centaurus A: A Peculiar Island of Stars (May 3. 2023)]
• [http://www.universetoday.com/wp-content/uploads/2006/07/ngc5128.jpg High-resolution image of Centaurus A] showing the discrete elements of galactic core
• [http://www.universetoday.com/?s=Centaurus Centaurus A] at UniverseToday.com
• [https://web.archive.org/web/20090209000355/http://www.dsi-astronomie.de/Centaurus.html NGC5128 Centaurus A]
• [http://www.docdb.net/show_object.php?id=ngc_5128 NGC 5128] at DOCdb (Deep Sky Observer's Companion)
• {{WikiSky}}
• [http://www.constellation-guide.com/centaurus-a/ Centaurus A at Constellation Guide]

{{Sky|13|25|27.6|-|43|01|09|13700000}}

{{catalogs | NGC=5128 | Arp=153 | PGC=46957 | C=77}}

{{Caldwell catalogue}}

{{Ngc55}}

{{Centaurus}}

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{{DEFAULTSORT:Centaurus A}}

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