Hemisphere:  Northern  ·  Constellation: Cygnus (Cyg)  ·  Contains:  20 d Cyg  ·  24 psi Cyg  ·  26 e Cyg  ·  27 b01 Cyg  ·  28 b02 Cyg  ·  29 b03 Cyg  ·  30 Cyg  ·  31 omi01 Cyg  ·  32 omi02 Cyg  ·  34 P Cyg  ·  35 Cyg  ·  36 Cyg  ·  37 gam Cyg  ·  39 Cyg  ·  40 Cyg  ·  42 Cyg  ·  43 Cyg  ·  44 Cyg  ·  45 ome01 Cyg  ·  46 ome02 Cyg  ·  47 Cyg  ·  49 Cyg  ·  50 alf Cyg  ·  51 Cyg  ·  53 eps Cyg  ·  54 lam Cyg  ·  55 Cyg  ·  56 Cyg  ·  57 Cyg  ·  58 nu. Cyg  ·  And 151 more.
Getting plate-solving status, please wait...
Northern Coalsack, 



    
        

            Gary Imm
Northern Coalsack, 



    
        

            Gary Imm

Northern Coalsack

Getting plate-solving status, please wait...
Northern Coalsack, 



    
        

            Gary Imm
Northern Coalsack, 



    
        

            Gary Imm

Northern Coalsack

Imaging telescopes or lenses: Canon 50mm f/1.8 Canon

Imaging cameras: Canon Rebel T1I

Mounts: Astro-Physics Mach1GTO

Guiding telescopes or lenses: Orion 60mm Guidescope

Guiding cameras: Orion StarShoot AutoGuider Pro Mono

Software: Main Sequence Software Sequence Generator Pro  ·  PixInsight  ·  Stark Labs PHD2 2.6.3


Dates:Oct. 1, 2019

Frames: 10x90" (15') ISO1600

Integration: 15'

Avg. Moon age: 3.11 days

Avg. Moon phase: 10.57%


Astrometry.net job: 2975210

RA center: 20h 43' 45"

DEC center: +43° 2' 22"

Pixel scale: 18.884 arcsec/pixel

Orientation: -91.059 degrees

Field radius: 13.624 degrees


Resolution: 4220x3043

Data source: Backyard

Description

This naked eye object is a huge dark nebula located 500 light years away in the constellation of Cygnus at a declination of +43 degrees. The nebula spans 8 degrees in our apparent view, which corresponds to a span of 70 light years.

The original Coalsack is a wonderfully dark hole in space next to the Southern Cross in the Southern Hemisphere. I live too far north and have never seen it. But I have heard mention numerous times of the Northern Coalsack in the Northern Hemisphere, next to the Northern Cross. Now that I have found it, I will say that it is a bit disappointing. There are a number of dark nebula in its vicinity and it is actually hard to pick out which one is the Northern Coalsack. I have attached an annotated version of this image to clearly identify it. The informally named Funnel Cloud is just as visible to the naked eye as the Northern Coalsack, and there are other dark nebulae nearby as well. This object seems like a desperate attempt to try to satisfy Northern Hemisphere observers craving for their own coalsack, but to me the Northern Coalsack is just a generic version of the real thing. Surprisingly, both Coalsacks are located the same distance from us and are equally as dark, but the original Southern Coalsack looks so much more dramatic because the Milky Way surrounding it is so bright in that region.

I originally was going to make this a large mosaic with my CMOS camera, but in hindsight I am glad that I decided to image it with my DSLR. This is my first DSLR astrophotography image and it was a bit of a learning curve to get the imaging and processing done correctly. I am satisfied with the image but I have so much still to learn about DSLR astrophotography.

Comments

Revisions

  • Final
    Northern Coalsack, 



    
        

            Gary Imm
    Original
  • Northern Coalsack, 



    
        

            Gary Imm
    B

B

Description: Annotated

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Sky plot

Sky plot

Histogram

Northern Coalsack, 



    
        

            Gary Imm

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