NGC 903

{{short description|Lenticular galaxy in the constellation Aries}}

{{Infobox galaxy

| name = NGC 903

| image = File:NGC 903 NGC 904 legacy dr9.jpg

| caption = legacy surveys image of NGC 903 (right) and NGC 904

| epoch = J2000

| constellation name = Aries

| ra = {{RA|02|24|00.89555}}{{cite DR2}}

| dec = {{DEC|+27|21|23.1264}}

| z = 0.01682

| h_radial_v = 5000 km/s

| dist_ly = {{cvt|70.83|±|4.97|Mpc|Mly|lk=on|order=flip}}{{cite web|url=https://ned.ipac.caltech.edu/byname?objname=NGC%20903&hconst=67.8&omegam=0.308&omegav=0.692&wmap=4&corr_z=1|title=Results for object NGC 0903 (NGC 903)|work=NASA/IPAC Extragalactic Database|publisher=California Institute of Technology|access-date=2020-05-25}}| group_cluster =

| type =

| size =

| appmag_v =

| appmag_b = 16.71{{cite web|url=http://leda.univ-lyon1.fr/ledacat.cgi?o=NGC%20903|title=Search specification: NGC 903|work=HyperLeda|publisher=Université Claude Bernard Lyon 1|access-date=2020-05-25}}

| absmag_v =

| size_v =

| notes =

| names = {{odlist|UGC=|MCG=|PGC=9097}}{{cite simbad|title=NGC 903|access-date=2020-05-25}}

}}

NGC 903 is a lenticular galaxy in the constellation Aries. It is estimated to be about 230 million light-years from the Milky Way and has a diameter of approximately 35,000 ly. NGC 903 was discovered on 13 December 1884 by the astronomer Edouard Stephan.{{Cite web|url=https://in-the-sky.org/data/object.php?id=NGC903|title=The galaxy NGC 903 - In-The-Sky.org|last=Ford|first=Dominic|website=in-the-sky.org|language=en|access-date=2020-03-21}}{{Cite web|url=http://spider.seds.org/ngc/revngcic.cgi?NGC%20903|title=Revised NGC Data for NGC 903|website=spider.seds.org|access-date=2020-03-21}}