NGC 4056

{{Short description|Galaxy in the constellation Coma Berenices}}

{{Infobox Galaxy

| name = NGC 4056

| image = 250px

| caption = SDSS image of NGC 4056.

| epoch = J2000

| type = E0?{{Cite web|url=https://cseligman.com/text/atlas/ngc40a.htm#4056|title=New General Catalog Objects: NGC 4050 - 4099|website=cseligman.com|access-date=2019-08-11}}

| ra = {{RA|12|03|57.8}}

| dec = {{DEC|20|18|45}}

| dist_ly = {{convert|105|Mpc|Mly|abbr=on|lk=on|order=flip}}{{cite web

| title=NASA/IPAC Extragalactic Database

| work=Results for NGC 4056

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

| access-date=2019-08-11}}

| group_cluster = NGC 4065 Group

| h_radial_v = 7386 km/s

| z = 0.024637

| appmag_v = 17.68

| size_v = 0.26 x 0.18

| constellation name = Coma Berenices

| names = PGC 038140

|size=~{{convert|20|kpc|ly|abbr=on|lk=on|order=flip}} (estimated)}}

NGC 4056 is an elliptical galaxy located about 340 million light-years away{{Cite web|url=https://ned.ipac.caltech.edu/cgi-bin/nph-objsearch?objname=NGC%204056&extend=no&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=2019-08-11}} in the constellation Coma Berenices. The galaxy was discovered by astronomer Albert Marth on March 18, 1865 and is a member of the NGC 4065 Group.{{Cite journal|last=Mahdavi|first=Andisheh|last2=Geller|first2=Margaret J.|date=2004-05-01|title=A Redshift Survey of Nearby Galaxy Groups: The Shape of the Mass Density Profile|journal=The Astrophysical Journal|volume=607|issue=1|pages=202–219|doi=10.1086/383458|arxiv=astro-ph/0402161|bibcode=2004ApJ...607..202M|issn=0004-637X|doi-access=free}}

Although NGC 4056 is commonly equated with PGC 38140, there is still uncertainty in its identification.{{Cite web|url=http://haroldcorwin.net/ngcic/ngcnotes.all|title=Notes on the NGC objects, particularly those missing, misidentified, or otherwise unusual (ngcnotes.all).|website=Historically-aware NGC/IC Positions and Notes|access-date=2019-08-11}}