Celestial hemisphere:  Northern  ·  Constellation: Cygnus (Cyg)  ·  Contains:  Crescent nebula  ·  IC 1311  ·  IC 1318  ·  NGC 6871  ·  NGC 6883  ·  NGC 6888  ·  NGC 6914  ·  Part of the constellation Cygnus (Cyg)  ·  The star 22Cyg  ·  The star 25Cyg  ·  The star 27Cyg  ·  The star 28Cyg  ·  The star 29Cyg  ·  The star 34Cyg  ·  The star 35Cyg  ·  The star 47Cyg  ·  The star Sadr (γCyg)  ·  The star ηCyg  ·  gamma Cyg nebula
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Nebula between Sadr and Eta Cygni, 



    
        

            Yuichi Kawamoto
Nebula between Sadr and Eta Cygni
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Nebula between Sadr and Eta Cygni

Getting plate-solving status, please wait...
Nebula between Sadr and Eta Cygni, 



    
        

            Yuichi Kawamoto
Nebula between Sadr and Eta Cygni
Powered byPixInsight

Nebula between Sadr and Eta Cygni

Equipment

Imaging Telescopes Or Lenses
Borg 55FL · Borg 67FL
Imaging Cameras
Canon EOS 6D · QHYCCD QHY16200A
Mounts
CEM60
Filters
IDAS HEUIBII
Accessories
BORG Reducer 0.8x DGQ55 [7880] · Borg 7108
Software
Astroplace.net APT
Guiding Telescopes Or Lenses
Takahashi GT-40
Guiding Cameras
QHYCCD QHY5L-II M

Acquisition details

Dates:
April 29, 2017 ·  April 30, 2017
Frames:
154×140(5h 59′ 20″) ISO800
IDAS HEUIBII: 74×300(6h 10′) -20°C bin 1×1
Integration:
12h 9′ 20″
Darks:
10
Flats:
50
Bias:
50
Avg. Moon age:
4.02 days
Avg. Moon phase:
17.42%

Basic astrometry details

Astrometry.net job: 1672181

RA center: 20h14m05s.0

DEC center: +39°0939

Pixel scale: 7.254 arcsec/pixel

Orientation: 179.553 degrees

Field radius: 6.475 degrees

Resolution: 1224x1455

File size: 1.7 MB

Description

Cygnus nebulous area between the Sadl and Eta Cyg, from the famous bright clusters around Sadl down to southern, relatively faint, widely spread behind the star cloud.

Wide field like this is typically planned with camera lenses, but fine star cloud cannot be resolved with shorter lenses. I then took my 300mm class Borg and planned a six panel mosaic to acquire details and yet wide field.

Cygnus in April was at low altitude then quality of images were not satisfactory yet for the long exposure. Waiting for Summer and Autumn to get better condition, I want to expand its plan to wider area to cover all nebula around the area.

Comments

Revisions

  • Nebula between Sadr and Eta Cygni, 



    
        

            Yuichi Kawamoto
    Original
  • Nebula between Sadr and Eta Cygni, 



    
        

            Yuichi Kawamoto
    B
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            Yuichi Kawamoto
    C
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            Yuichi Kawamoto
    D
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            Yuichi Kawamoto
    E
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            Yuichi Kawamoto
    F
  • Nebula between Sadr and Eta Cygni, 



    
        

            Yuichi Kawamoto
    I
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    J
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            Yuichi Kawamoto
    L
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            Yuichi Kawamoto
    M
  • Nebula between Sadr and Eta Cygni, 



    
        

            Yuichi Kawamoto
    N
  • Final
    Nebula between Sadr and Eta Cygni, 



    
        

            Yuichi Kawamoto
    O

F

Description: A-F are original subframes of L image, to identify coordinates for alignments thanks to astrobin's platesolving :)

Uploaded: ...

I

Description: First attempt of mosaic composition of L subframes. Corrected some unmatched star positions between Cyg2 and Cyg4

Uploaded: ...

J

Description: Combined LRGB with RGB images obtained from DSLR.

Uploaded: ...

L

Description: Trial of enhancement with first LRGB, resolution reduced by 1/2 from the original mosaic image of 8,238x9,778.

Uploaded: ...

M

Description: LRGB with DSLR RGB image mixed for better mosaic composition. Star sharpness not satisfactory.

Uploaded: ...

N

Description: Revised L reprocessing flatness of individual subframes.

Uploaded: ...

O

Description: Final revision. Image size reduced to 1/2 from original mosaic image of 8,275x9835.

Uploaded: ...

Sky plot

Sky plot

Histogram

Nebula between Sadr and Eta Cygni, 



    
        

            Yuichi Kawamoto