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NGC281 (The Pac-man Nebula), 



    
        

            Eric Solís
Powered byPixInsight

NGC281 (The Pac-man Nebula)

Getting plate-solving status, please wait...
NGC281 (The Pac-man Nebula), 



    
        

            Eric Solís
Powered byPixInsight

NGC281 (The Pac-man Nebula)

Acquisition details

Dates:
Nov. 29, 2017
Frames:
ZWO Ha 36mm: 10×300(50′) (gain: 139.00) -20°C bin 1×1
ZWO OIII 36mm: 9×300(45′) (gain: 139.00) -20°C bin 1×1
ZWO SII 36mm: 9×300(45′) (gain: 139.00) -20°C bin 1×1
Integration:
2h 20′
Darks:
16
Flats:
25
Bias:
110
Avg. Moon age:
10.14 days
Avg. Moon phase:
77.69%
Bortle Dark-Sky Scale:
5.00
Temperature:
32.00

RA center: 00h53m09s.29

DEC center: +56°3817.7

Pixel scale: 1.038 arcsec/pixel

Orientation: 62.650 degrees

Field radius: 0.585 degrees

WCS transformation: thin plate spline

More info:Open 

Resolution: 2957x2777

File size: 4.0 MB

Locations: Backyard, Milford, MA, United States

Description

My first attempt at The Pac-man Nebula in Hubble palette. Definitely needs more time, will probably gather more data this week, but I like to see what I can get out of the subs I have.

I also would like to capture just the stars in RGB, because I really don't like the unnatural star color I get with narrowband. I'm sure there is a way to do it in PixInsight, the only question is how many days will it take to figure it out

Comments

Revisions

  • NGC281 (The Pac-man Nebula), 



    
        

            Eric Solís
    Original
  • NGC281 (The Pac-man Nebula), 



    
        

            Eric Solís
    B
  • NGC281 (The Pac-man Nebula), 



    
        

            Eric Solís
    C
  • NGC281 (The Pac-man Nebula), 



    
        

            Eric Solís
    D
  • NGC281 (The Pac-man Nebula), 



    
        

            Eric Solís
    E
  • Final
    NGC281 (The Pac-man Nebula), 



    
        

            Eric Solís
    F

B

Description: I changed the color combination to:
R = 0.5 x SII + 0.5 x Ha
G = 0.9 x Ha + 0.1 x OIII
B = 1.0 x OIII

I like the hue and internal contrast of the result. Also, I saturated the colors less this time to make the result less iridescent.

Uploaded: ...

C

Description: Slight curves adjustment

Uploaded: ...

D

Description: A very nice new color combination that was graciously suggested by the awesome and very helpful Ruben Barbosa!

R: 75% SII + 25%Ha
G: 33% SII + 33% Ha + 33%OII
B: 100% OIII

I used Ha alone as a pseudo-luminance because the data quality for the other filters was much lower and introduced too much noise when mixed with Ha for pseudo-luminance.

Thanks again to Ruben for the tips! Input like this is what makes AstroBin such a fantastic community, especially for someone like me who is still daunted by the complexities of the image processing! And doubly for those of us moving to narrow band from a DSLR!

Uploaded: ...

E

Description: Similar to D, except with more noise reduction and increased contrast between nebula and background.

Again, many thanks to Ruben for his suggestions with the processing of this image!

Uploaded: ...

F

Description: Slight background reduction from E.

Uploaded: ...

Sky plot

Sky plot

Histogram

NGC281 (The Pac-man Nebula), 



    
        

            Eric Solís