Astronomy:Palomar 4

From HandWiki
(Redirected from Astronomy:UGCA 237)
Palomar 4
Palomar 4 HST 10622 01 R775G555B475.png
The globular cluster Palomar 4, taken by the Hubble Space Telescope
Observation data (J2000 epoch)
ConstellationUrsa Major
Right ascension 11h 29m 16.8s[1]
Declination+28° 58′ 25″[1]
Distance356 kly[citation needed] (109 kpc)
Physical characteristics
Other designationsUGCA 237, GCl 17[1]
See also: Globular cluster, List of globular clusters

Palomar 4 is a globular cluster of the Milky Way galaxy belonging to the Palomar Globular Clusters group. It was discovered in 1949 by Edwin Hubble and again in 1955 by A. G. Wilson. Based on measurements of the stars from the Gaia spacecraft, it is at least 65,000 light-years (20,000 parsecs) from the Sun.

This star cluster is further away than the SagDEG satellite galaxy.

Initially it was thought to be a dwarf galaxy, and it was given the name Ursa Major Dwarf. However, it was later discovered to be a globular cluster.

See also

  • Ursa Major Dwarf

References

  1. 1.0 1.1 1.2 "SIMBAD Astronomical Database". Results for Palomar 4. http://simbad.u-strasbg.fr/Simbad. Retrieved 2006-11-17. 

External links

Coordinates: Sky map 11h 29m 16.8s, +28° 58′ 25″