Andromeda XI

{{Short description|Galaxy in constellation Andromeda}}

{{Distinguish|Xi Andromedae}}

{{Infobox Galaxy

| name = Andromeda XI

| epoch = J2000

| type = dSph D{{Cite simbad|title=NAME Andromeda XI|access-date=2017-11-03}}

| ra = {{RA|00|46.3}}

| dec = {{DEC|+33|48|05}}

| dist_ly = 2.6 ± 325 Mly (830 kpc){{Cite web|url=http://www.atlasoftheuniverse.com/galaxies.html|title=The Galaxies of the Local Group|access-date=2017-11-03}}

| size_v = 0.5 arcmin{{Cite web|url=http://spider.seds.org/spider/LG/and11.html|title=Andromeda XI|access-date=2017-11-03}}

| constellation name = Andromeda

| z = -0.001399 ± 0.000015

| h_radial_v = (-419 ± 4.4) km/s

| absmag_v = −7.3{{cite journal|bibcode=2012MNRAS.419.1362Y|title=HST/WFPC2 Imaging of the Dwarf Satellites And XI and And XIII : HB Morphology and RR Lyraes|journal=Monthly Notices of the Royal Astronomical Society|volume=419|issue=2|pages=1362|doi=10.1111/j.1365-2966.2011.19792.x|year=2012|last1=Yang|first1=S.-C|last2=Sarajedini|first2=A|doi-access=free |arxiv=1109.2038|s2cid=119190619}}

| notes = satellite galaxy of the Andromeda Galaxy

| names = And XI, PGC 5056923

}}

Andromeda XI (And 11) is a dwarf spheroidal galaxy about 2.6 million light-years away from the Sun in the constellation Andromeda. Discovered in 2006, And XI is a satellite galaxy of the Andromeda Galaxy (M31).