NGC 304

{{Short description|Galaxy in constellation Andromeda}}

{{Use mdy dates|date=October 2016}}

{{Infobox galaxy

| name = NGC 304

| image = File:NGC304 - SDSS DR14.jpg

| caption = SDSS image of NGC 304

| epoch = J2000

| ra = {{RA|00|56|06.0}}{{cite web

| title=NASA/IPAC Extragalactic Database

| work=Results for NGC 0304

| url=http://ned.ipac.caltech.edu/cgi-bin/objsearch?objname=NGC+304&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

| access-date=September 2, 2016}}

| dec = {{DEC|+24|07|37}}

| constellation name = Andromeda

| z = 0.016648

| h_radial_v = 4,991 km/s

| type = S0{{cite simbad|title=NGC 304|access-date=December 31, 2016}}

| appmag_v = 14.01

| size_v = 1.1' × 0.7'

| notes =

| names = UGC 00573, CGCG 480-023, MCG +04-03-018, 2MASX J00560603+2407367, 2MASXi J0056060+240735, PGC 3326.

}}

NGC 304 is a lenticular galaxy in the constellation Andromeda. It was discovered on October 23, 1878, by Édouard Stephan.{{cite web|title=New General Catalog Objects: NGC 300 - 349|url=http://cseligman.com/text/atlas/ngc3.htm#304|publisher=Cseligman|access-date=October 19, 2016}}

One supernova, SN 2021dnn (type Ia, mag. 15.3), was discovered in NGC 304 on 22 February, 2021.[https://www.wis-tns.org/object/2021dnn Transient Name Server entry for SN 2021dnn.] Retrieved 23 March 2023.