« back to overview Cluster Load higher resolution (1800 x 1200 Pixel    2800 x 2200 Pixel)
Object description
NGC 6200, NGC 6204, Hogg 20, 21 and Hogg 22 - open star clusters in the constellation Ara - a widefield view

Object description:

NGC 6200 is an open star cluster in the constellation (Ara) Altar and is classified as type III 2 m according to Trumpler. With an apparent diameter of just under 15 arcminutes it lies at a distance of about 6700 light-years in the middle of the Ara OB2 star association. It was discovered by John Herschel on July 1, 1834.
NGC 6204 is a small compact open star cluster with an apparent diameter of only 5 arcminutes. It is classified as type I 2 p according to Trumpler. NGC 6204 contains about 36 stars and is located about 3500 light-years from the solar system. The cluster was discovered by James Dunlop on May 13, 1826.

Directly southeast lies the much younger star cluster Hogg 22. With a distance of about 9000 light-years it is nearly 3 times farther away from the solar system than NGC 6204. 22 stars are assigned to Hogg 22. The age of the stars is estimated to be only a few million years.

« Click here or the thumbnail to load a large annoted image.

Sun Moon Solar System DeepSky Widefield Miscellaneous Spec. Projects
All Images and all Content are © by Franz Hofmann + Wolfgang Paech