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NGC 6910, Collinder 419 und Dolidze 10 - open star clusters
near Gamma Cygni |
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Short objekt description:
NGC 6910 is an open star
cluster in the constellation Cygnus. It is located half a degree east-northeast
of Gamma Cygni and has the proper name Sadr. All three clusters in this image
are embedded in the bright H-II emission IC 1318
(Gamma Cygni Nebula Complex). Sub-segments of IC 1318 are also catalogued as
LBN 234, 241, 245 and 249.
NGC 6910 is the core region of the
Cygnus OB 9 stellar association. It is classified
as Type I 2 p n by Trumpler and contains about 50
stars. The age of the stars is estimated at about 10 million stars, and its
distance from the solar system is given as 3,700 light-years. It was discovered
by Friedrich Wilhelm Herschel on 17 October 1786.
Collinder 419
Collinder 419 is a small and concentrated open star cluster. Its
central star is HD 193 322 with spectral type O9IV. It is a multiple star
system, probably consisting of 3 individual components and a total mass of
about 80 solar masses. Collinder 419 has been
studied relatively extensively and its distance is given as
about 3,300 light years in a 2019 publication. |
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Dolidze 10
There is almost
no information about this star cluster. Among many catalogues of DeepSky
objects there is also one called Dolidze Dzimselejsvili (DoDz). The catalogue
contains eleven inconspicuous star clusters in the northern sky. All of these
clusters have in common that they consist of a few stars with medium to low
brightness. There is no information about the two authors - Dolidze and
Dzimselejsvili - despite a long search on the internet. Dolidze has an apparent
diameter of just under 20 arc minutes and contains about 12
stars.
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by Franz Hofmann + Wolfgang Paech |