NGC 256

{{Short description|Open cluster in the constellation Tucana}}

{{Infobox open cluster

| name = NGC 256

| image = File:NGC 256 DECam.png

| caption = NGC 256 with DECam

| epoch = J2000

| constellation = Tucana

| ra = {{RA|00|45|54.11}}{{cite simbad|title=NGC 256}}

| dec = {{DEC|-73|30|23.9}}

| dist_ly =

| dist_pc =

| appmag_v = 12.50

| size_v = 0.9{{prime}} × 0.9{{prime}}

| mass_msol = {{val|1.3e3}}{{cite journal|doi=10.1093/mnras/stab2297|title=STEP survey – II. Structural analysis of 170 star clusters in the SMC|year=2021|last1=Gatto|first1=M.|last2=Ripepi|first2=V.|last3=Bellazzini|first3=M.|last4=Tosi|first4=M.|last5=Cignoni|first5=M.|last6=Tortora|first6=C.|last7=Leccia|first7=S.|last8=Clementini|first8=G.|last9=Grebel|first9=E. K.|last10=Longo|first10=G.|last11=Marconi|first11=M.|last12=Musella|first12=I.|journal=Monthly Notices of the Royal Astronomical Society|volume=507|issue=3|pages=3312–3330|doi-access=free |arxiv=2108.02791}}

| age = 83 Myr

| notes =

| names = Kron 23, ESO 29-SC11

|image_size=250}}

NGC 256 (also known as ESO 29-SC11) is open cluster in the Tucana constellation. It was discovered by John Frederick William Herschel on April 11, 1834.{{cite web|url=http://cseligman.com/text/atlas/ngc2a.htm#256|website=cseligman.com|title=New General Catalog Objects: NGC 250 - 299|access-date=12 February 2017}}