Palomar 5, Serpens Dwarf
Globular Cluster Palomar 5 (Serpens Globular Cluster, Serpens Dwarf),
Discovered by W. Baade in 1950.
- Distance from Sun:
- 75.6 kly
- Distance from Galactic Center:
- 60.6 kly
- Apparent Diameter:
- 6.9 arc min
- 11.75 mag vis
- Radial Velocity:
- -58.7 +/- 0.2 km/s
- Abs. Mag:
- -5.17 Mag vis
Independently found by A.G. Wilson in 1955.
Palomar 5 was discovered by Walter Baade in 1950, and independently found again
by A.G. Wilson in 1955 (A.G. Wilson 1955). Wilson named
it the Serpens Globular Cluster, not necessarily a happy naming because Serpens
also contains four more globulars, including famous M5.
He published its discovery together with that of
Palomar 3, Palomar 4
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,
and suspected to be a Local Group member candidate because of its resolution
It was found that Palomar 5 is currently undergoing a process of tidal
disruption by the gravitation of the Milky Way galaxy. Many former cluster
mermber stars are moving away from it, forming tails in opposite directions
which probably exist already for several billion years, and extends now over
a length of over 13,000 light years
(Odenkirchen et.al. 2001).
The image on the right was obtained by
More information on this image (Chris & Dawn Schur)
This image was obtained by Chris
& Dawn Schur, taken with their 12.5" f/5 Home made Newtonian and
SBIG ST7E CCD camera with Enhanced Cooling, from Payson, Arizona. It is an LRGB
composite of exposures LRGB = 60:10:10:10 min.
- 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)
- Michael Odenkirchen, Eva K. Grebel, Constance M.
Rocksoi, Walter Dehnen, Rodrigo Ibata, Hans-Walter Rix, Andrea Stolte,
Christian Wolf, John E. Anderson, Jr., Neta A. Bahcall, Jon Brinkmann,
Istv&aecute;n Csabai, G. Hennessy, Robert B. Hindsley, Zeljko Ivezić,
Robert H. Lupton, Jeffrey A. Munn, Jeffrey R. Pier, Chris Stoughton,
Donald G. York, 2001.
Detection of Massive Tidal Tails around the Globular Cluster Palomar 5 with
Sloan Digital Sky Survey Commissioning Data.
The Astrophysical Journal, Volume 548, Issue 2, pp. L165-L169.
[ADS: 2001ApJ...548L.165O] -
- 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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