Palomar 4, Ursa Major Dwarf
Globular Cluster Palomar 4 (Ursa Major Globular, Ursa Major Dwarf),
in Ursa Major
Discovered by E.P. Hubble in 1949.
- 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
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
Apparently unaware or unsure about its classification as a globular, it was
temporarily taken for a nearby dwarf galaxy, of elliptical or spheroidal type,
Ursa Major Dwarf,
and suspected to be a Local Group member candidate because of its resolution
- George O. Abell, 1955.
Globular Clusters and Planetary Nebulae Discovered on the National Geographic
Society-Palomar Observatory Sky Survey.
Publications of the Astronomical Society of the Pacific, Vol. 67, No. 397,
p. 258 (August 1955)
- A.G. Wilson, 1955.
Sculptor-Type Systems in the Local Group of Galaxies.
Publications of the Astronomical Society of the Pacific, Vol. 67, No. 394,
pp. 27-29 (02/1955)
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