Hemisphere:  Northern  ·  Constellation: Cygnus (Cyg)  ·  Contains:  Crescent Nebula  ·  Crescent nebula  ·  NGC 6888  ·  NGC6888  ·  Sh2-105
Getting plate-solving status, please wait...
Crescent Nebula and Milky Way Stars, 



    
        

            KuriousGeorge
Powered byPixInsight

Crescent Nebula and Milky Way Stars

Imaging telescopes or lenses: Planewave CDK24

Imaging cameras: FLI Proline 16803

Mounts: Planewave L600

Guiding cameras: Starlight Xpress Ultrastar

Focal reducers: None

Software: Planewave PWI4  ·  Planewave PWI3  ·  PixInsight 1.8  ·  Sequence Generator Pro  ·  Photoshop CS3  ·  PHD Guiding 2  ·  CCDWare CCD Inspector  ·  Maxim DL6

Filters: Chroma 50 mm 5nm SII  ·  Astrodon 50 mm 5 nm Ha  ·  Astrodon 50mm B  ·  Astrodon 50mm R  ·  Astrodon 50 mm 5 nm OIII  ·  Astrodon 50 mm G

Accessory: FLI CFW-5-7  ·  Astrodon Monster MOAG  ·  Hedrick Focuser  ·  Planewave Delta-T  ·  Planewave EFA


Dates:June 21, 2020June 22, 2020June 23, 2020

Frames:
Astrodon 50 mm 5 nm Ha: 4x900" -30C bin 1x1
Astrodon 50 mm 5 nm OIII: 7x1800" -30C bin 1x1
Astrodon 50 mm 5 nm OIII: 8x900" -30C bin 1x1
Chroma 50 mm 5nm SII: 4x1800" -30C bin 1x1
Chroma 50 mm 5nm SII: 5x900" -30C bin 1x1
Astrodon 50 mm G: 4x900" -30C bin 1x1
Astrodon 50mm B: 4x900" -30C bin 1x1
Astrodon 50mm R: 4x900" -30C bin 1x1

Integration: 12.8 hours

Darks: ~40

Flats: ~120

Flat darks: ~120

Bias: ~20

Avg. Moon age: 1.23 days

Avg. Moon phase: 2.45%

Mean SQM: 21.70

Mean FWHM: 2.00


Astrometry.net job: 3628444

RA center: 20h 12' 5"

DEC center: +38° 21' 18"

Pixel scale: 0.468 arcsec/pixel

Orientation: 1.281 degrees

Field radius: 0.372 degrees


Resolution: 4028x4060

Locations: KG Observatory, Julian, CA, United States

Data source: Backyard

Description

This is a more traditional processing of my prior Hubble Palette data...

Hubble Palette Version

...OIII-SII-Ha-RGB with a bit more attention to maintaining the true color of the stars – even within the nebula. (-:

This adds 1800s x 7 OIII subs for a bit smoother and deeper in the OIII region. Also added 1800s x 4 SII. That helped a bit with the subtle coloring in the background.

Comments

Revisions

    Crescent Nebula and Milky Way Stars, 



    
        

            KuriousGeorge
    Original
    Crescent Nebula and Milky Way Stars, 



    
        

            KuriousGeorge
    B
  • Final
    Crescent Nebula and Milky Way Stars, 



    
        

            KuriousGeorge
    D

B

Description: Added 1 pixel dust removal to clean up pushed OIII noise artifacts.

Uploaded: ...

D

Description: Layered starless S and O over RGB. This allowed preserving their natural levels while maintaining the base RGB star color

Uploaded: ...

Sky plot

Sky plot

Histogram

Crescent Nebula and Milky Way Stars, 



    
        

            KuriousGeorge