NGC 731

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

{{Sky|01|54|56.208|-|09|00|38.90}}

{{Infobox galaxy

| image = File:NGC 731 legacy dr10.jpg

| alt = NGC 731

| caption = legacy surveys image of NGC 731

| epoch = J2000

| constellation name = Cetus

| ra = {{RA|01|54|56.208}}

| dec = {{DEC|-09|00|38.90}}

| h_radial_v = 3875 km/s

| z = 0.01301

| dist_ly = {{cvt|52.7|Mpc|Mly|lk=on|order=flip}}{{cite journal|doi=10.1111/j.1365-2966.2010.16753.x|title=Accurate masses for dispersion-supported galaxies|year=2010|last1=Wolf|first1=Joe|last2=Martinez|first2=Gregory D.|last3=Bullock|first3=James S.|last4=Kaplinghat|first4=Manoj|last5=Geha|first5=Marla|author5-link= Marla Geha |last6=Muñoz|first6=Ricardo R.|last7=Simon|first7=Joshua D.|last8=Avedo|first8=Frank F.|journal=Monthly Notices of the Royal Astronomical Society|volume=406 |issue=2 |page=1220 |doi-access=free |s2cid=14616368|arxiv=0908.2995|bibcode=2010MNRAS.406.1220W }}

| group_cluster =

| type = E, cD:{{cite web|url=https://ned.ipac.caltech.edu/byname?objname=NGC%20731&hconst=67.8&omegam=0.308&omegav=0.692&wmap=4&corr_z=1|title=Results for object NGC 0731 (NGC 731)|work=NASA/IPAC Extragalactic Database|publisher=California Institute of Technology|accessdate=2021-08-26}}

| size =

| appmag_v = 12.14{{cite web|url=http://leda.univ-lyon1.fr/ledacat.cgi?o=NGC%20731|title=Search specification: NGC 731|work=HyperLeda|publisher=Université Claude Bernard Lyon 1|accessdate=2021-08-26}}

| appmag_b = 13.06

| absmag_v =

| size_v =

| names = {{odlist|UGC=|MCG=-02-05-073|PGC=7118}}{{cite simbad|title=NGC 731|accessdate=2021-08-26}}}}

NGC 731 is an elliptical galaxy located in the constellation of Cetus about 172 million light-years away from the Milky Way. It was discovered by William Herschel on January 10, 1785.{{cite web|url=http://cseligman.com/text/atlas/ngc7.htm#731|title=New General Catalogue objects: NGC 700 - 749|author=Seligman, Courtney|website=cseligman.com|accessdate=2021-08-26}} It has a luminosity of {{val|3.9e10|ul=solar luminosity}}.