NGC 3254

{{Short description|Spiral galaxy in the constellation Leo Minor}}

{{Infobox galaxy

| image = 250px

| alt = NGC 3254

| caption = SDSS image of NGC 3254

| epoch = J2000

| constellation name = Leo Minor

| ra = {{RA|10|29|19.922}}{{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|+29|29|29.18}}

| h_radial_v = 1363 ± 10 km/s

| z = 0.004556

| dist_ly =

| group_cluster =

| type = SA(s)bc{{cite web|url=https://ned.ipac.caltech.edu/byname?objname=NGC%203254&hconst=67.8&omegam=0.308&omegav=0.692&wmap=4&corr_z=1|title=Results for object NGC 3254 (NGC 3254)|work=NASA/IPAC Extragalactic Database|publisher=California Institute of Technology|accessdate=2021-05-17}}

| size =

| appmag_v = 11.60

| appmag_b = 12.29

| absmag_v =

| size_v =

| names = {{odlist | IRAS= F10265+2944 | UGC= 5685 | MCG= +05-25-018 | PGC= 30895 | CGCG= 154-020}}{{cite simbad|title=NGC 3254|accessdate=2021-05-17}}

}}

NGC 3254 is a spiral galaxy in the constellation Leo Minor. It was discovered on March 13, 1785, by the astronomer William Herschel.{{cite web|url=http://cseligman.com/text/atlas/ngc32a.htm#3254|title=New General Catalogue objects: NGC 3250 - 3299|author=Seligman, Courtney|website=cseligman.com|accessdate=2021-05-17}} It is a member of the NGC 3254 Group of galaxies, which is a member of the Leo II Groups, a series of galaxies and galaxy clusters strung out from the right edge of the Virgo Supercluster.{{cite web | title=The Leo III Groups |work=Atlas of the Universe |url=http://www.atlasoftheuniverse.com/galgrps/leoii.html |access-date=2010-11-27 |archive-date=July 22, 2012 |archive-url=https://archive.today/20120722223749/http://www.atlasoftheuniverse.com/galgrps/leoii.html |url-status=live }}

Two supernovae have been observed in NGC 3254:

• SN 1941B (type unknown, mag. 15.1){{cite simbad|title=SN 1941B|accessdate=2021-05-17}}{{cite web | website=Transient Name Server | title=SN{{nbsp}}1941B | url=https://www.wis-tns.org/object/1941B | publisher = IAU | access-date=27 November 2024}} was discovered by Josef J. Johnson on 25 March 1941.{{cite web

| url = http://www.cbat.eps.harvard.edu/IAUCs/IAUC0862.jpg

| title = Circular No. 862

| last = Elis

| first = Stromgren

| date = 13 May 1941

| website = Central Bureau for Astronomical Telegrams

| publisher = Observatory Copenhagen

| access-date = 27 November 2024

}} [Note: some sources incorrectly list the discovery date as 28 March 1941.]

• SN 2019np (type Ia, mag. 13.0) was discovered by Kōichi Itagaki on 9 January 2019.{{cite web | website=Transient Name Server | title=SN{{nbsp}}2019np | url=https://www.wis-tns.org/object/2019np | publisher = IAU | access-date=27 November 2024}} This supernova was the brightest observed in the year 2019.{{cite web

| url = https://www.rochesterastronomy.org/sn2019/index.html

| title = Bright Supernovae - 2019

| last = Bishop

| first = David

| website = Rochester Astronomy

| access-date = 9 December 2024

}}