Ursa Minor Dwarf

{{Short description|Dwarf spheroidal galaxy}}

{{Infobox Galaxy

| image =Ursa Minor Dwarf - Giuseppe Donatiello.jpg

| caption = Ursa Minor Dwarf

| name = Ursa Minor Dwarf

| epoch = J2000

| type = E{{cite web

| title=NASA/IPAC Extragalactic Database

| work=Results for Ursa Minor Dwarf

| url=http://nedwww.ipac.caltech.edu/

| access-date=2006-11-29 }}

| ra = {{RA|15|09|08.5}}

| dec = {{DEC|+67|13|21}}

| dist_ly = 200 ± 30 kly (60 ± 10 kpc){{cite journal

| author=I. D. Karachentsev

| author2=V. E. Karachentseva

| author3=W. K. Hutchmeier

| author4=D. I. Makarov

| title=A Catalog of Neighboring Galaxies

| journal=Astronomical Journal

| date=2004

| volume=127

| issue=4

| pages=2031–2068

| bibcode=2004AJ....127.2031K

| doi=10.1086/382905| doi-access=free

}}{{cite journal

| author=Karachentsev, I. D.

| author2=Kashibadze, O. G.

| title=Masses of the local group and of the M81 group estimated from distortions in the local velocity field

| journal=Astrophysics

| date=2006

| volume=49

| issue=1

| pages=3–18

| bibcode=2006Ap.....49....3K

| doi=10.1007/s10511-006-0002-6 | s2cid=120973010

}}

| z = {{val|−247|1|u=km/s}}

| appmag_v = 11.9

| size_v = 30′.2 × 19′.1

| constellation name = Ursa Minor

| notes = Satellite galaxy of Milky Way

| names = UGC 9749, PGC 54074, DDO 199, UMi Dwarf }}

File:Ursa-Minor-Dwarf-Combi-image-text.jpg

The Ursa Minor Dwarf is a dwarf spheroidal galaxy, discovered by A.G. Wilson of the Lowell Observatory, in the United States, during the Palomar Sky Survey in 1955.{{cite book|last=Bergh|first=Sidney |title=The Galaxies of the Local Group|publisher=Cambridge University Press|location=Cambridge, United Kingdom|date=2000|pages=257|isbn=978-1-139-42965-8|url=https://books.google.com/books?id=H0JMeoqFqEcC&pg=PA257}} It appears in the Ursa Minor constellation, and is a satellite galaxy of the Milky Way. The galaxy consists mainly of older stars and seems to house little to no ongoing star formation. Its centre is around 225,000 light years distant from Earth.{{cite journal|author=Grebel, Eva K.|author2=Gallagher, John S., III|author3=Harbeck, Daniel|title=The Progenitors of Dwarf Spheroidal Galaxies|journal=The Astronomical Journal|year=2003|volume=125|issue=4|pages=1926–39|doi=10.1086/368363 | bibcode=2003AJ....125.1926G|arxiv = astro-ph/0301025 |s2cid=18496644}}