IC 5146 - Cocoon Nebula (wide field) (Kurt Zeppetello)

IC 5146 - Cocoon Nebula (wide field)

Link: http://youtube.com/c/AstroQuest1

This is my wide field shot of the region around IC 5146, the Cocoon Nebula (also Caldwell 19, Sh 2-125, Barnard 168), in the Cygnus constellation. IC 5146 is an emission and reflection nebula 15 light years wide and located 4000 light years away. There is a lot of dust in around IC 5146 with a dark dust tail containing several dark nebulae streaming towards the top of my image. These dark nebulae are in Lynds Dark Nebula catalog and designated LDN 1042, 1045, 1047, 1030, 1031, 1040, 1035 and 1040 where LDN 1042 is closest to IC 5146 and LDN 1040 is farthest away. My favorite is LDN 1035 which seems to resemble a crown at the top center of my image.

IC 5146 is relatively bright and ionized hydrogen gas gives it the reddish glow. The small blue reflection nebula to the upper right of IC 5146 is vdB 147. This image was taken with the ASI2600 MC (a color camera) and I did not use a filter in order to capture the heavily dusted region as well as the stars, however, to capture the faint red glow of the ionized hydrogen in the background I used the dual band IDAS NBZ filter. This filter is capable of picking up ionized hydrogen (red) and ionized oxygen (blue). The two separate images were then blended inorder to highlight the dust and stars of the unfiltered data and the glowing hydrogen of the filtered image.

On the left side of the image there is a blue nebula surrounding bright star coordinates, ~ 49 03 16, 22 00 23, which only shows up in the data collected using the dual band IDAS NBZ filter. Since it is blue that would indicate that it is composed of oxygen rather than the hydrogen that predominates most of the background in this region.

Dates: 10-2-23, 10-3, 10-4, 10-10, 10-11, 10-12, 10-13, 11-1, 11-2, 11-5, 11-12

Final
Original
B

B

Description: RGB only

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Status	Advanced success
Started	...
Astrometry.net job	8885813
PixInsight job	TJ95TOM8UCMO2L9R2SRFYOM5U4MB49TG
PixInsight queue size	n/a
PixInsight stage	TASK_LOG

RA (center)	21h50m59s.50
RA (top/left)	21h50m49s.81
RA (top/right)	21h36m40s.91
RA (bottom/right)	21h51m08s.77
RA (bottom/left)	22h05m53s.72

Dec (center)	+47°34′16″.7
Dec (top/left)	+50°15′21″.8
Dec (top/right)	+46°27′19″.4
Dec (bottom/right)	+44°53′33″.8
Dec (bottom/left)	+48°34′27″.7

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