NGC 939

{{Short description|Elliptical or lenticular galaxy in the constellation Eridanus}}

{{Infobox galaxy

| name = NGC 939

| image = File:NGC 939 DECam.jpg

| caption = DECam image of NGC 939

| epoch = J2000

| constellation name = Eridanus

| ra = {{RA|02|26|21.312}}{{cite journal |doi=10.1086/498708 |last1=Skrutskie |first1=Michael F. |last2=Cutri |first2=Roc M. |last3=Stiening |first3=Rae |last4=Weinberg |first4=Martin D. |last5=Schneider |first5=Stephen E. |last6=Carpenter |first6=John M. |last7=Beichman |first7=Charles A. |last8=Capps |first8=Richard W. |last9=Chester |first9=Thomas |last10=Elias |first10=Jonathan H. |last11=Huchra |first11=John P. |last12=Liebert |first12=James W. |last13=Lonsdale |first13=Carol J. |last14=Monet |first14=David G. |last15=Price |first15=Stephan |last16=Seitzer |first16=Patrick |last17=Jarrett |first17=Thomas H. |last18=Kirkpatrick |first18=J. Davy |last19=Gizis |first19=John E. |last20=Howard |first20=Elizabeth V. |last21=Evans |first21=Tracey E. |last22=Fowler |first22=John W. |last23=Fullmer |first23=Linda |last24=Hurt |first24=Robert L. |last25=Light |first25=Robert M. |last26=Kopan |first26=Eugene L. |last27=Marsh |first27=Kenneth A. |last28=McCallon |first28=Howard L. |last29=Tam |first29=Robert |last30=Van Dyk |first30=Schuyler D. |last31=Wheelock |first31=Sherry L. |title=The Two Micron All Sky Survey (2MASS) |journal=The Astronomical Journal |date=1 February 2006 |volume=131 |issue=2 |pages=1163–1183 |bibcode=2006AJ....131.1163S |s2cid=18913331 |issn=0004-6256 |doi-access=free }}

| dec = {{DEC|-44|26|46.08}}

| z = 0.017186

| h_radial_v = 5108 km/s

| dist_ly = {{cvt|74.01|±|5.22|Mpc|Mly|lk=on|order=flip}}{{cite web|url=https://ned.ipac.caltech.edu/byname?objname=NGC%20939&hconst=67.8&omegam=0.308&omegav=0.692&wmap=4&corr_z=1|title=Results for object NGC 0939 (NGC 939)|work=NASA/IPAC Extragalactic Database|publisher=California Institute of Technology|access-date=2020-05-30}}

| group_cluster =

| type = S0/a/E{{cite web|url=http://leda.univ-lyon1.fr/ledacat.cgi?o=NGC%20939|title=Search specification: NGC 939|work=HyperLeda|publisher=Université Claude Bernard Lyon 1|access-date=2020-05-30}}

| size =

| appmag_v =

| appmag_b = 14.06

| absmag_v =

| size_v =

| names = {{odlist|UGC=|MCG=-07-06-004|PGC=9271}}{{cite simbad|title=NGC 939|access-date=2020-05-30}}}}

NGC 939 is a lenticular or elliptical galaxy in the constellation Eridanus. It is estimated to be 241 million light-years from the Milky Way and has a diameter of approximately 80,000 ly. NGC 939 was discovered on October 18, 1835 by astronomer John Herschel.{{Cite web|url=http://spider.seds.org/ngc/revngcic.cgi?NGC%20939|title=Revised NGC Data for NGC 939|website=spider.seds.org|access-date=2020-03-26}}{{Cite web|url=https://in-the-sky.org/data/object.php?id=NGC939|title=The galaxy NGC 939 - In-The-Sky.org|last=Ford|first=Dominic|website=in-the-sky.org|language=en|access-date=2020-03-26}}

NGC 939 is better seen from the southern hemisphere because of its location south of the celestial equator.{{Cite web|title=NGC 939 - Elliptical Galaxy {{!}} TheSkyLive.com|url=https://theskylive.com/sky/deepsky/ngc939-object|access-date=2020-12-04|website=theskylive.com}}