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Contains:  M 1, Crab nebula, NGC 1952
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M1: Crab Nebula in RGB-Ha-OIII, 





    
        

            Chris Sullivan
M1: Crab Nebula in RGB-Ha-OIII

M1: Crab Nebula in RGB-Ha-OIII

Technical card

Resolution: 4000x3000

Dates:Oct. 25, 2018Dec. 7, 2018Dec. 8, 2018Dec. 19, 2018Dec. 20, 2018Dec. 27, 2018Jan. 4, 2019Jan. 6, 2019Jan. 7, 2019Jan. 11, 2019Jan. 12, 2019Jan. 15, 2019

Frames:
Blue: 102x150" (gain: 139.00)
Green: 85x150" (gain: 139.00)
ZWO H-alpha 7nm: 95x300" (gain: 139.00)
ZWO OIII: 99x300" (gain: 139.00)
ZWO Red: 95x150" (gain: 139.00)

Integration: 27.9 hours

Avg. Moon age: 9.12 days

Avg. Moon phase: 39.63%

Bortle Dark-Sky Scale: 8.00

Astrometry.net job: 2484212

RA center: 83.632 degrees

DEC center: 22.014 degrees

Pixel scale: 0.456 arcsec/pixel

Orientation: 269.852 degrees

Field radius: 0.317 degrees

Locations: Home Roof (Bortle 7-8 / Est. Sky Quality: 18.53), Springfield, PA, United States

Data source: Backyard

Description

This is my attempt at a narrowband-enhanced RGB version. I'm really happy with how this came out. Special thanks to everyone who provided criticism on earlier drafts - specifically TJ Connolly, Jarrett Trezzo, Rolf Karlstad, Alan Pham, Thomas Butts, Bob Andrews, Grant Blair and Karol Masztalerz, all of whom pointed out issues that I was overlooking. I didn't incorporate every suggestion, but I did incorporate at least one change from everyone. Isn't the AP community great?

Comments

Author

Chris-PA
Chris Sullivan
License: None (All rights reserved)
3965
Like

Revisions

  • M1: Crab Nebula in RGB-Ha-OIII, 





    
        

            Chris Sullivan
    Original
  • M1: Crab Nebula in RGB-Ha-OIII, 





    
        

            Chris Sullivan
    B
  • M1: Crab Nebula in RGB-Ha-OIII, 





    
        

            Chris Sullivan
    C
  • Final
    M1: Crab Nebula in RGB-Ha-OIII, 





    
        

            Chris Sullivan
    D

B

Crop

C

Selective color adjustments.

D

Crop

Sky plot

Sky plot

Histogram

M1: Crab Nebula in RGB-Ha-OIII, 





    
        

            Chris Sullivan