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NGC 6200, NGC 6204 and Hogg 21 + 22 - open star clusters in
the constellation Ara |
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Object description:
NGC 6200 is an
open star cluster in the constellation (Ara) Altar and is classified as
type III 2 m by 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 stellar association. It was discovered
by John Herschel on July 1, 1834.
NGC 6204 und Hogg 22 - an Odd
Couple
NGC 6204 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. |
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Directly southeast lies the clearly 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.
More
information about NGC 6204 and Hogg 22
can be found here.
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All Images and all Content are ©
by Franz Hofmann + Wolfgang Paech |