Ursa Major Dwarf, Palomar 4

Globular Cluster Palomar 4, class XII, formerly misclassified as Dwarf Spheroidal Galaxy Ursa Major Dwarf, (UGCA 237, A 1127), in Ursa Major

RA:
11 : 29.3
Dec:
+28 : 58
Type:
RV:
Distance:
356 kly
Apparent Dimension:
2.1 arc min
Diameter:
Brightness:
+14.2 mag
Abs. Mag:
Mass:
Discovered by E.P. Hubble in 1949.
Independently rediscovered by A.G. Wilson in 1955.

On various occasions, globular cluster Palomar 4 was taken for a nearby dwarf elliptical (or spheroidal) galaxy, and supposed to be a Local Group member candidate because of its resolution into stars. At its distance of 356,000 light years, this object is significantly more remote than the nearest satellite galaxies of the Milky Way, namely SagDEG and the Magellanic Clouds.


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Hartmut Frommert
Christine Kronberg
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