Ursa Minor Dwarf

Dwarf Spheroidal Galaxy Ursa Minor Dwarf (UGC 9749, DDO 199, A1508), type dE4, in Ursa Minor

RA:
15 : 08.8
Dec:
+67 : 12
Type:
dSph/E4
RV:
Distance:
240 kly
Apparent Dimension:
41.0 x 26.0 arc min
Diameter:
Brightness:
10.9 m_v
Abs. Mag:
Mass:
Discovered by A.G. Wilson in 1954.

The Ursa Minor Dwarf was discovered by A.G. Wilson of Lowell Observatory, who had already discovered dwarf galaxy Leo I some years earlier, on photographic plates from the National Geographic Society - Palomar Observatory Sky Survey (POSS) in the early 1954, together with the Draco Dwarf (Wilson 1955).

Ursa Minor Dwarf is one of the small satellite galaxies of our Milky Way Galaxy, at a distance of about 240,000 light years. It is a dwarf elliptical or dwarf spheroidal galaxy, consisting of an old stellar population only and no significant amount of interstellar matter.

References:



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Hartmut Frommert
Christine Kronberg
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Last Modification: May 29, 2002