Palomar 4 Explained

Palomar 4
Epoch:J2000
Constellation:Ursa Major
Ra:[1]
Dist Ly:326 kly
Dist Pc:100 kpc
Names:UGCA 237, GCl 17

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. It is calculated to be 100000abbr=offNaNabbr=off from the Sun.[2]

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

Notes and References

  1. Web site: SIMBAD Astronomical Database . Results for Palomar 4 . 2006-11-17.
  2. Zonoozi . Akram Hasani . Haghi . Hosein . Kroupa . Pavel . Küpper . Andreas H.W. . Baumgardt . Holger . Direct N-body simulations of globular clusters – III. Palomar 4 on an eccentric orbit . Monthly Notices of the Royal Astronomical Society . 19 January 2017 . stx130 . 10.1093/mnras/stx130 . free . 1701.06168 .