Sh2-125 + B168 (Cocoon Nebula) (Ben Hayes)

Celestial hemisphere: Northern · Constellation: Cygnus (Cyg) · Contains: B168 · Cocoon Nebula · IC 5146 · LBN 424 · LDN 1055 · Sh2-125 · VdB147

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Sh2-125 + B168 (Cocoon Nebula)

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Sh2-125 + B168 (Cocoon Nebula)

Most plate solvers identify this target as IC 5146, which specifically refers to the cluster of stars (9.5 mag) in the bright Ha-rich nebula. The open star cluster is also known as Collinder 470.

Sharpless 125 (Sh2-125) is the catalog entry for the entire Cocoon nebula and Barnard 168 (B168) refers to the dark nebula surrounding the IC5146/Col 470 star cluster. Edward Emerson Barnard, a gifted observational astronomer, discovered this nebula in a photograph taken on October 11, 1893 using the 6" Willard lens at the Lick Observatory in California (USA). B168 forms a dark, dusty trail behind the Cocoon that projects westward over a great distance. Its very prominent in the wide-field image taken with the RedCat51 telescope (shown below; the high-resolution version is Revision C).

Sh2-125+B168 (Cocoon Nebula) - RedCat51 and LX200 comparison.jpeg

Wishing you clear skies! 🔭

Original
Final
B
D

B

Description: Same as original (Revision A), but with out the acquisition details.

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D

Description: Wide field image of Sh2-125 + B126 (Cocoon Nebula) taken with RedCat51 (focal length = 249mm) and inset image taken with 8" Meade LX200 "classic" SCT (focal length = 1219mm). A few facts about the target and the astronomer who discovered it are included out of interest.

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Status	Advanced success
Started	...
Astrometry.net job	8375324
PixInsight job	M6QH12YCY5CICSP27KP4QNUPU6V4N79Q
PixInsight queue size	n/a
PixInsight stage	TASK_LOG

RA (center)	21h53m26s.849
RA (top/left)	21h53m10s.501
RA (top/right)	21h51m30s.952
RA (bottom/right)	21h53m43s.260
RA (bottom/left)	21h55m23s.707

Dec (center)	+47°16′17″.76
Dec (top/left)	+47°37′44″.13
Dec (top/right)	+47°07′27″.28
Dec (bottom/right)	+46°54′51″.74
Dec (bottom/left)	+47°25′00″.91

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Sh2-125 + B168 (Cocoon Nebula)

Sh2-125 + B168 (Cocoon Nebula)

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Sh2-125 + B168 (Cocoon Nebula)

Sh2-125 + B168 (Cocoon Nebula)

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