Hemisphere:  Northern  ·  Constellation: Cygnus (Cyg)  ·  Contains:  Crescent Nebula  ·  NGC 6888
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NGC 6888 (Crescent Nebula) HOO narrowband, 



    
        

            rhedden
NGC 6888 (Crescent Nebula) HOO narrowband
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NGC 6888 (Crescent Nebula) HOO narrowband

Technical card

Imaging telescopes or lenses: Edge HD 1100

Imaging cameras: QSI 660 WS

Mounts: Software Bisque Paramount MX

Guiding telescopes or lenses: Edge HD 1100

Focal reducers: Celestron f/7 reducer for Edge 1100 HD

Software: Microsoft Image Composite Editor (ICE)  ·  Topaz Labs Topaz DeNoise AI  ·  GIMP  ·  Deep Sky Stacker  ·  Fitswork 4  ·  IrfanView  ·  Software Bisque The SkyX Professional  ·  Astra Image 3.0

Filters: Orion Extra Narrowband Filter OIII 1.25"  ·  Orion Extra Narrowband Filter Ha 1.25"

Accessory: Innovations Foresight On-axis guider  ·  Starlight Xpress Lodestar X2


Dates:July 7, 2017July 11, 2017

Frames:
Orion Extra Narrowband Filter Ha 1.25": 75x270" -14C bin 2x2
Orion Extra Narrowband Filter OIII 1.25": 22x270" -14C bin 2x2

Integration: 7.3 hours

Avg. Moon age: 15.08 days

Avg. Moon phase: 96.14%

Bortle Dark-Sky Scale: 8.00


Basic astrometry details

Astrometry.net job: 4136569

RA center: 20h 12' 12"

DEC center: +38° 21' 10"

Pixel scale: 0.962 arcsec/pixel

Orientation: 294.726 degrees

Field radius: 0.410 degrees


Resolution: 2423x1882

Locations: Back Yard, Lubbock, TX, United States

Data source: Backyard

Description

This is a four-panel mosaic image of NGC 6888, the Crescent Nebula, in HOO narrowband color. Most of the subs were acquired from the city during a period when the moon was nearly full, so the image isn't as deep as it could be. The blue halo from the OIII filter did not show up at all, in fact. However, the seeing was quite good, so the details are rather sharp.

One of these days, I am going to get some good imaging weather without the full moon, and I'll do something besides urban back yard narrowband imaging!

Comments

Revisions

  • NGC 6888 (Crescent Nebula) HOO narrowband, 



    
        

            rhedden
    Original
  • Final
    NGC 6888 (Crescent Nebula) HOO narrowband, 



    
        

            rhedden
    B

B

Description: This image is a 4-panel mosaic shot with the C11 Edge at f/7. Since the O-iii data for this image were so weak (due to shooting from an urban location), I should have gone with the monochrome H-alpha version shown here. Some noise reduction was applied in Topaz DeNoise AI, which is working wonders with my H-alpha data.

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Sky plot

Sky plot

Histogram

NGC 6888 (Crescent Nebula) HOO narrowband, 



    
        

            rhedden