NGC 861

{{Short description|Spiral galaxy in the constellation Triangulum}}

{{Infobox galaxy

| name = NGC 861

| image = 250px

| caption = Pan-STARRS image of NGC 861

| epoch = J2000

| constellation name = Triangulum

| ra = {{RA|02|15|51.146}}{{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|+35|54|48.89}}

| z = 0.027249

| h_radial_v = 8058 km/s

| dist_ly = {{cvt|110.59|Mpc|Mly|lk=on|order=flip}}{{cite journal|title=Groups of Galaxies in the Two Micron All Sky Redshift Survey|author1=Crook, Aidan C.|author2=Huchra, John P.|author3=Martimbeau, Nathalie|author4=Masters, Karen L.|author5=Jarrett, Tom|author6=Macri, Lucas M.|journal=The Astrophysical Journal|volume=655|issue=2|pages=790–813|date=2007|bibcode=2007ApJ...655..790C|doi=10.1086/510201|arxiv=astro-ph/0610732|s2cid=11672751 }}

| group_cluster =

| type = Sb

| size =

| appmag_v =

| appmag_b = 14.8

| absmag_v =

| size_v =

| notes =

| names = {{odlist|UGC=1737|MCG=+06-06-003|PGC=8652}}{{cite simbad|title=NGC 861|access-date=2020-05-25}}

}}

NGC 861 is a spiral galaxy in the constellation Triangulum. It is estimated to be 360 million light-years from the Milky Way and has a diameter of approximately 165,000 light-years. The object was discovered on September 18, 1865 by Heinrich d'Arrest.{{Cite web|url=https://in-the-sky.org/data/object.php?id=896|title=The galaxy NGC 861 - In-The-Sky.org|last=Ford|first=Dominic|website=in-the-sky.org|language=en|access-date=2020-04-26}}{{Cite web|url=http://ned.ipac.caltech.edu/cgi-bin/objsearch?objname=NGC+861&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|title=Your NED Search Results|website=ned.ipac.caltech.edu|access-date=2020-04-26}}{{Cite web|url=http://spider.seds.org/ngc/revngcic.cgi?NGC%20861|title=Revised NGC Data for NGC 861|website=spider.seds.org|access-date=2020-04-26}}