NGC 721

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

{{Infobox galaxy

| name = NGC 721

| image = 250px

| caption = Pan-STARRS image of NGC 721

| epoch = J2000

| constellation name = Andromeda

| ra = {{RA|01|54|45.45687}}{{cite DR2}}

| dec = {{DEC|+39|23|00.7702}}

| z = 0.018566{{cite simbad|title=NGC 721|access-date=2020-05-20}}

| h_radial_v = 5514 km/s

| dist_ly = {{cvt|55.98|Mpc|Mly|order=flip|lk=on}}{{cite journal|bibcode=2016AJ....152...50T|doi=10.3847/0004-6256/152/2/50|arxiv=1605.01765|title=Cosmicflows-3|author1=Tully, R. Brent|author2=Courtois, Hélène M.|author3=Sorce, Jenny G.|journal=The Astronomical Journal|volume=152|issue=2|id=50|pages=21|date=2016|s2cid=250737862 |doi-access=free }}

| group_cluster =

| type = SB(rs)bc{{cite web|url=https://ned.ipac.caltech.edu/byname?objname=NGC%20721&hconst=67.8&omegam=0.308&omegav=0.692&wmap=4&corr_z=1|title=Results for object NGC 0721 (NGC 721)|work=NASA/IPAC Extragalactic Database|publisher=California Institute of Technology|access-date=2020-05-24}}

| size =

| appmag_v =

| appmag_b = 13.8

| absmag_v =

| notes =

| names = {{odlist|UGC=1376|MCG=06-05-043|PGC=7097}}

}}

NGC 721 is a barred spiral galaxy located in the constellation Andromeda about 250 million light years from the Milky Way. It was discovered by the Prussian astronomer Heinrich d'Arrest in 1862.{{Cite web|url=https://in-the-sky.org/data/object.php?id=NGC721|title=The galaxy NGC 721 - In-The-Sky.org|last=Ford|first=Dominic|website=in-the-sky.org|language=en|access-date=2020-04-09}}{{Cite web|url=http://spider.seds.org/ngc/revngcic.cgi?NGC721|title=Revised NGC Data for NGC 721|website=spider.seds.org|access-date=2020-04-09}}{{Cite web|url=http://ned.ipac.caltech.edu/cgi-bin/nph-objsearch?objname=ngc+721&img_stamp=YES|title=Your NED Search Results|website=ned.ipac.caltech.edu|access-date=2020-04-09}}