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Harel Boren | all galleries >> Galleries >> International Acknowledgements - APODs and Publications > C19, Sh 2-125, IC 5146 and Barnard 168 The Cocoon Nebula
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Sept. 16, 2009 Harel Boren

C19, Sh 2-125, IC 5146 and Barnard 168 The Cocoon Nebula

Km. 101, East Negev Desert, Israel

Canon XSi, modded, Total RGB 42 min. = 14x3 min, ISO 1600
Baader MPCC, LXD75-SN10 OTA at F4, EQ6 mount, guided w/PHD and EQMOD

Text taken from

The Cocoon Nebula, is a reflection/emission nebula and Caldwell object in the constellation Cygnus.

IC 5146 is a star cluster and the nebula is Sh2-125. It shines at magnitude +10 or even +7.2 according to other sources. It is located near the naked-eye star Pi Cygni, the open cluster NGC 7209 in Lacerta, and the bright open cluster M39.

The cluster is about 4,000 light years away, and the central star that lights it formed about 100,000 years ago; the nebula is about 12 arcmins across, which is equavalent to a span of 15 light years.

When viewing IC 5146, dark nebula Barnard 168 is an inseparable part of the experience, forming a dark lane that surrounds the cluster and projects westward forming the appearance of a trail behind the Cocoon.

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