Palomar 4, Ursa Major Dwarf

Globular Cluster Palomar 4 (Ursa Major Globular, Ursa Major Dwarf), class XII, in Ursa Major

Distance from Sun:
354.4 kly
Distance from Galactic Center:
362.5 kly
Apparent Diameter:
2.1 arc min
14.20 mag vis
Radial Velocity:
+74.5 +/- 2.1 km/s
Abs. Mag:
-3.11 Mag vis
Discovered by E.P. Hubble in 1949.
Independently rediscovered by A.G. Wilson in 1955.

Palomar 4 was discovered by E.P. Hubble in 1949, and independently found by A.G. Wilson one year later, in 1950 (A.G. Wilson 1955). Wilson named it the Ursa Major Globular Cluster. He published its discovery together with that of Palomar 3, Palomar 5 and Palomar 13, and two new Local Group galaxies. G.O. Abell (1955) cataloged them with their Palomar numbers.

Apparently unaware or unsure about its classification as a globular, it was temporarily taken for a nearby dwarf galaxy, of elliptical or spheroidal type, named the Ursa Major Dwarf, and suspected to be a Local Group member candidate because of its resolution into stars.



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