NGC 784

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

{{Infobox galaxy

| name = NGC 784

| image = NGC 784 Hubble WikiSky.jpg

| caption = NGC 784 imaged by the Hubble Space Telescope

| epoch = J2000

| type = SBdm?{{cite web

| website=NASA/IPAC Extragalactic Database

| title=Results for object NGC 0784

| publisher = NASA and Caltech

| url=https://ned.ipac.caltech.edu/byname?objname=NGC+0784

| access-date=17 February 2013}}

| ra = {{RA|02|01|16.9067}}

| dec = {{DEC|28|50|12.274}}

| dist_ly = {{convert|5|Mpc|Mly|abbr=on|lk=on}}{{cite journal|last=Zitrin|first=Adi|author2=Brosch, Noah |title=The NGC 672 and 784 galaxy groups: evidence for galaxy formation and growth along a nearby dark matter filament|journal=Monthly Notices of the Royal Astronomical Society|date=26 July 2008|volume=390|issue=1|pages=408–420|doi=10.1111/j.1365-2966.2008.13786.x|doi-access=free |arxiv = 0808.1789 |bibcode = 2008MNRAS.390..408Z |s2cid=16296617 }}

| z = 0.000660{{r|ned}}

| h_radial_v = {{val|198|1|u=km/s|fmt=commas}}{{r|ned}}

| appmag_v = 12.23

| size_v = {{Val|6.6|×|1.5|u=arcminute}}

| size = ~{{convert|8.37|kpc|ly|abbr=on|lk=on|order=flip}} (estimated){{r|ned}}

| constellation name = Triangulum

| notes =

| names = {{odlist | PGC= 7671 | UGC= 1501 | CGCG= 503-074 | MCG= +05-05-045 | IRAS= 01584+2836}}

}}

NGC 784 is a barred spiral galaxy about 16.0 Mly away in the constellation Triangulum. NGC 784 is located within the Virgo Supercluster.{{cite web|title=NGC 784 -- Low Surface Brightness Galaxy|url=http://simbad.u-strasbg.fr/simbad/sim-id?Ident=NGC+784&jsessionid=61C561FEFC7B0A353E310973596FF50D|publisher=SIMBAD|access-date=18 February 2013}} It was discovered by German astronomer Heinrich Louis d'Arrest on 20 September 1865.{{cite web | url = https://cseligman.com/text/atlas/ngc7a.htm#784 | title = New General Catalogue Objects: NGC{{nbsp}}784 | last = Seligman | first = Courtney | website = Celestial Atlas | access-date = 19 June 2025 }}