IC5146 (Cocoon Nebula) and B168 (Jeff Weiss)

Celestial hemisphere: Northern · Constellation: Cygnus (Cyg) · Contains: B168 · Cocoon nebula · IC 5146 · LBN 424 · LDN 1030 · LDN 1031 · LDN 1040 · LDN 1042 · LDN 1045 · LDN 1047 · LDN 1055 · Sh2-125 · VdB147

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IC5146 (Cocoon Nebula) and B168

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IC5146 (Cocoon Nebula) and B168

IC 5146 (the Cocoon Nebula) is a reflection/emission nebula and Caldwell object (C19) in Cygnus. The NGC description refers to IC 5146 as a cluster of 9.5 mag stars involved in a bright and dark nebula. The cluster is ~4,000 ly away, 15 ly in size and the central star that lights it formed about 100,000 years ago. Dark nebula Barnard 168 (B168) is an inseparable part this object, forming a dark lane that surrounds the cluster and projects westward forming the appearance of a trail behind the Cocoon. (Ref. Wikipedia). This 8.8hr LRGB image, using the new PI 1.8.5 Photometric Color Calibration, seems to show quite a bit more reflection than emission in the bright nebula than most renditions. This image uses the new PixInsight Photometric Color Calibration (PCC) process which is based upon the known colors of numerous stars in the image. Perhaps that might have to do with not having any Ha data in this image which might otherwise overwhelm the reflection areas but that is pure speculation.

Collected 8/19/17, 9/15/17 at D.A.R.C. Observatory, Mercey Hot Springs, CA.

Original
C
G
K
Final
L

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Status	Advanced success
Started	...
Astrometry.net job	1875572
PixInsight job	CE55VD8563WNXTD16ZSWH7EGLCDHSK60
PixInsight queue size	n/a
PixInsight stage	TASK_LOG

RA (center)	21h50m14s.92
RA (top/left)	21h55m30s.43
RA (top/right)	21h44m48s.43
RA (bottom/right)	21h45m07s.42
RA (bottom/left)	21h55m34s.73

Dec (center)	+47°28′45″.10
Dec (top/left)	+48°08′52″.9
Dec (top/right)	+48°06′09″.6
Dec (bottom/right)	+46°47′40″.5
Dec (bottom/left)	+46°50′14″.8

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IC5146 (Cocoon Nebula) and B168

IC5146 (Cocoon Nebula) and B168

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IC5146 (Cocoon Nebula) and B168

IC5146 (Cocoon Nebula) and B168

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