NGC 172

{{Short description|Barred spiral galaxy in the constellation Cetus}}

{{Infobox galaxy

| name = NGC 172

| image = 250px

| upright = 1.35

| alt = NGC 172

| caption = NGC 172 as seen on SDSS

| epoch = J2000

| ra = {{RA|00|37|13.6}}{{cite web

| work=NASA/IPAC Extragalactic Database

| title=Results for NGC 0172

| url=http://ned.ipac.caltech.edu/cgi-bin/objsearch?objname=NGC+172&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=2016-09-02}}

| dec = {{DEC|-22|35|13}}

| constellation name = Cetus

| z = 0.010164

| dist_ly = 136 MlyAn object's distance from Earth can be determined using Hubble's law: v=H_o is Hubble's constant (70±5 (km/s)/Mpc). The relative uncertainty Δd/d divided by the distance is equal to the sum of the relative uncertainties of the velocity and v=H_o

| type = SB(r)bc?

| appmag_v = 15.09

| size_v = 2.0' × 0.3'

| notes =

| names = ESO 474- G 005, MCG -04-02-027, 2MASX J00371359-2235132, 2MASXi J0037135-223513, IRAS 00348-2251, IRAS F00347-2012, ESO-LV 4740050, 6dF J0037136-223513, PGC 2228.

}}

NGC 172 is a barred spiral galaxy located around 136 million light-years away in the constellation Cetus. It was discovered in 1886 by astronomer Frank Muller.{{cite web|title=New General Catalog Objects: 150 - 199|url=http://cseligman.com/text/atlas/ngc1a.htm#172|website=cseligman.com|access-date=2018-02-13}}