Cookie consent

AstroBin saves small pieces of text information (cookies) on your device in order to deliver better content and for statistical purposes. You can disable the usage of cookies by changing the settings of your browser. By browsing AstroBin without changing the browser settings, you grant us permission to store that information on your device.

I agree
Contains:  Crescent nebula, NGC 6888
Getting plate-solving status, please wait...
Crescent at 0.5"/pixel based on Ha L OIII data, 





    
        

            avarakin
Crescent at 0.5"/pixel based on Ha L OIII data

Crescent at 0.5"/pixel based on Ha L OIII data

Technical card

Imaging telescope or lens:GSO 10" f8 RC

Imaging camera:SBIG 8300M

Mount:Losmandy G11 with OnStep

Guiding telescope or lens:GSO 10" f8 RC

Guiding camera:Meade DSI1

Focal reducer:AstroTech AT2FF

Software:PixInsight PinInsight 1.8PHD guidingKstars/Ekos

Filters:Baader OIII 36mmBaader Ha 36mm

Resolution: 3194x2428

Frames:
Baader Planerarium Baader Filter Ha 36mm 7nm: 18x1200" bin 1x1
Baader Planerarium Baader Filter OIII 36mm 7nm: 35x1200" bin 1x1

Integration: 17.7 hours

Astrometry.net job: 3089350

RA center: 20h 12' 9"

DEC center: +38° 20' 56"

Pixel scale: 0.560 arcsec/pixel

Orientation: 359.548 degrees

Field radius: 0.312

Data source: Backyard

Description

This is a close up of Crescent. I used the following PixelMath formula for producing this image:
Red = H
Green = 0.4*O+H*0.1+0.5*L
Blue = 0.8*O+H*0.2

I did not see much of SII signal in this object, so I stopped taking it and instead just took a little bit of Luminance which was mixed into Green channel.

Comments

Author

avarakin
avarakin
License: None (All rights reserved)
1490
Like

Revisions

  • Crescent at 0.5"/pixel based on Ha L OIII data, 





    
        

            avarakin
    Original
  • Crescent at 0.5"/pixel based on Ha L OIII data, 





    
        

            avarakin
    B
  • Final
    Crescent at 0.5"/pixel based on Ha L OIII data, 





    
        

            avarakin
    C

B

Enhanced blue channel to show outer OIII shell

C

Major reprocess. Reduced clipping and noise

Sky plot

Sky plot

Histogram

Crescent at 0.5"/pixel based on Ha L OIII data, 





    
        

            avarakin

In these public groups

Suburban Astrophotography