NGC 4709

{{Short description|Galaxy in the constellation Centaurus}}

{{Infobox Galaxy

| name = NGC 4709

| image = File:NGC 4706 NGC 4709 legacy dr10.jpg

| image_size = 250px

| caption = legacy surveys image of NGC 4709 (large galaxy in the middle), as well as other galaxies of the Centaurus Cluster, including NGC 4706.

| epoch = J2000

| type = E1{{cite web

| title=NASA/IPAC Extragalactic Database

| work=Results for NGC 4709

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

| access-date=2018-04-12}}

| ra = {{RA|12|50|03.9}}

| dec = {{DEC|-41|22|55}}

| dist_ly = {{convert|45|Mpc|Mly|abbr=on|lk=on|order=flip}}

| group_cluster = Centaurus Cluster (Cen 45 subgroup)

| h_radial_v = 4678 km/s

| z = 0.015604

| appmag_v = 12.0

| size_v = 2.4 x 2.0

| constellation name = Centaurus

| names = ESO 323-3, CCC 130, MCG -7-26-56, PGC 43423

|size=~{{convert|39.14|kpc|ly|abbr=on|lk=on|order=flip}} (estimated)}}

NGC 4709 is an elliptical galaxy{{Cite web|url=http://ned.ipac.caltech.edu/cgi-bin/objsearch?objname=NGC+4709&extend=no&hconst=73&omegam=0.27&omegav=0.73&corr_z=1&out_csys=Equatorial&out_equinox=J2000.0&obj_sort=RA+or+Longitude&of=pre_text&zv_breaker=30000.0&list_limit=5&img_stamp=YES|title=Your NED Search Results|website=ned.ipac.caltech.edu|access-date=2018-04-13}} located in the constellation Centaurus.{{Cite web|url=http://spider.seds.org/ngc/revngcic.cgi?NGC4709|title=Revised NGC Data for NGC 4709|website=spider.seds.org|access-date=2018-04-13}} It is considered to be a member of the Centaurus Cluster{{Cite journal|last1=Jerjen|first1=H.|last2=Dressler|first2=A.|date=1997-07-01|title=Studies of the Centaurus cluster|journal=Astronomy and Astrophysics Supplement Series|language=en|volume=124|issue=1|pages=1–12|doi=10.1051/aas:1997355|issn=0365-0138|bibcode=1997A&AS..124....1J|doi-access=free}}{{Cite book|url=https://books.google.com/books?id=BoIsCgAAQBAJ&pg=PA460|title=Deep-Sky Companions: Southern Gems|last=O'Meara|first=Stephen James|date=2013-04-08|publisher=Cambridge University Press|isbn=978-1-139-85154-1|page=460|bibcode=2013dcsg.book.....O}} and is the dominant member of a small group of galaxies known as "Cen 45"{{Cite journal|last1=Lucey|first1=J. R.|last2=Currie|first2=Malcom J.|last3=Dickens|first3=R. J.|date=1986-07-01|title=The Centaurus cluster of galaxies – II. The bimodal velocity structure|journal=Monthly Notices of the Royal Astronomical Society|language=en|volume=221|issue=2|pages=453–472|doi=10.1093/mnras/221.2.453|issn=0035-8711|bibcode=1986MNRAS.221..453L|doi-access=free}} which is currently merging with the main Centaurus Cluster (Cen 30){{Cite journal|last1=Churazov|first1=E.|last2=Gilfanov|first2=M.|last3=Forman|first3=W.|last4=Jones|first4=C.|date=1999|title=Evidence for Merging in the Centaurus Cluster|url=http://stacks.iop.org/0004-637X/520/i=1/a=105|journal=The Astrophysical Journal|language=en|volume=520|issue=1|pages=105|doi=10.1086/307421|issn=0004-637X|arxiv=astro-ph/9802166|bibcode=1999ApJ...520..105C|s2cid=18552647 }} even though the two subclusters' line of sight redshift velocities differ by about 1500 km/s.{{Cite journal|last1=Walker|first1=S. A.|last2=Fabian|first2=A. C.|last3=Sanders|first3=J. S.|date=2013-11-11|title=An XMM–Newton view of the merging activity in the Centaurus cluster|journal=Monthly Notices of the Royal Astronomical Society|language=en|volume=435|issue=4|pages=3221–3230|doi=10.1093/mnras/stt1515|doi-access=free |issn=0035-8711|arxiv=1308.2090|bibcode=2013MNRAS.435.3221W}} NGC 4709 was discovered by astronomer James Dunlop on May 7, 1826.{{Cite web|url=https://cseligman.com/text/atlas/ngc47.htm#4709|title=New General Catalog Objects: NGC 4700 - 4749|website=cseligman.com|language=en-US|access-date=2018-04-11}}