NGC 4309

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

{{Infobox Galaxy

| name = NGC 4309

| image = NGC4309 - SDSS DR14.jpg

| image_size = 250px

| caption = SDSS image of NGC 4309

| epoch = J2000

| constellation name = Virgo{{cite book

| editor=R. W. Sinnott

| title= The Complete New General Catalogue and Index Catalogue of Nebulae and Star Clusters by J. L. E. Dreyer

| date=1988

| publisher=Sky Publishing Corporation and Cambridge University Press

| isbn=978-0-933346-51-2}}

| type = SAB0^+(r){{cite web

| title=NASA/IPAC Extragalactic Database

| work=Results for NGC 4309

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

| access-date=2007-03-30}}

| ra = {{RA|12|22|12.4}}

| dec = {{DEC|07|08|40}}

| dist_ly ={{convert|16.6|Mpc|Mly|abbr=on|lk=on|order=flip}}

| h_radial_v = 869 km/s

| z = 0.002899

| appmag_v = 13.6

| size_v = 4.99 x 0.79

| group_cluster = Virgo Cluster

|size=~{{convert|19|kpc|ly|abbr=on|lk=on|order=flip}} (estimated)

| names = UGC 7435, PGC 40051, VCC 0534, MCG +01-32-025

}}

NGC 4309 is a lenticular galaxy located about 55 million light-years away{{Cite web|url=https://ned.ipac.caltech.edu/cgi-bin/objsearch?objname=NGC+4309&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=2019-09-01}} in the constellation Virgo. The galaxy was discovered by astronomer Christian Peters in 1881{{Cite web|url=https://cseligman.com/text/atlas/ngc43.htm#4309|title=New General Catalog Objects: NGC 4300 - 4349|website=cseligman.com|access-date=2019-08-19}} and is a member of the Virgo Cluster.{{Cite journal|last1=Binggeli|first1=B.|last2=Sandage|first2=A.|last3=Tammann|first3=G. A.|date=1985-09-01|title=Studies of the Virgo Cluster. II - A catalog of 2096 galaxies in the Virgo Cluster area.|journal=The Astronomical Journal|volume=90|pages=1681–1759|doi=10.1086/113874|issn=0004-6256|bibcode=1985AJ.....90.1681B}}{{Cite web|url=https://ned.ipac.caltech.edu/cgi-bin/NEDatt?objname=NGC+4309|title=Detailed Object Classifications|website=ned.ipac.caltech.edu|access-date=2019-09-01}}

NGC 4309 is classified as an AGN{{Cite journal|last1=Gavazzi|first1=G.|last2=Fumagalli|first2=M.|last3=Fossati|first3=M.|last4=Galardo|first4=V.|last5=Grossetti|first5=F.|last6=Boselli|first6=A.|last7=Giovanelli|first7=R.|last8=Haynes|first8=M. P.|date=2013-05-01|title=Halpha3: an Halpha imaging survey of HI selected galaxies from ALFALFA. II. Star formation properties of galaxies in the Virgo cluster and surroundings|journal=Astronomy and Astrophysics|volume=553|pages=A89|doi=10.1051/0004-6361/201218789|arxiv=1303.2846|issn=0004-6361|bibcode=2013A&A...553A..89G|doi-access=free}} and has undergone ram-pressure stripping.{{Cite journal|last1=Köppen|first1=J|last2=Jáchym|first2=P|last3=Taylor|first3=R|last4=Palouš|first4=J|date=2018-10-01|title=Ram pressure stripping made easy: an analytical approach|journal=Monthly Notices of the Royal Astronomical Society|language=en|volume=479|issue=4|pages=4367–4390|doi=10.1093/mnras/sty1610|doi-access=free|issn=0035-8711|arxiv=1806.05887|bibcode=2018MNRAS.479.4367K|s2cid=119245255}}