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:  Omega nebula, M 17, NGC 6618
Getting plate-solving status, please wait...
M17 Swan Nebula, 





    
        

            Michael Southam
M17 Swan Nebula

M17 Swan Nebula

Technical card

Resolution: 4260x2932

Dates:Aug. 13, 2015

Frames:
52x30"
NBPF Hydrogen-a 12nm: 51x40"

Integration: 1.0 hours

Darks: ~10

Avg. Moon age: 28.48 days

Avg. Moon phase: 1.23%

Astrometry.net job: 758337

RA center: 275.284 degrees

DEC center: -16.153 degrees

Orientation: -102.503 degrees

Field radius: 0.520 degrees

Locations: Stellafane, Springfield, Vermont, United States

Description

I had a thoroughly disappointing imaging session at Stellafane this year. Laptop ran out of juice before I could get all the subs I wanted. This initial revision is B&W luminance only but I did get a bunch of Ha subs too but haven't managed to stack those yet. I will add to this image when I do. Also had no battery to take darks so I used darks from a previous session which I know is a big no no. Like I said, thoroughly disappointing session and a waste of the only clear night at Stellafane 2015. The fact that the end result is half decent is a testament to the clear skys in Vermont.

Revision 1 - Slight adjustments to levels and curves on base luminance image.

Revision 2 - One small step for man. I have been wanting to add filtered shots to an image for 12 months or so and I have finally managed it. Bought a Ha filter at NEAF and tried it out at Stellafane. Although this imaging session was fairly unsuccessful, I did manage to get 50 x 40 second images in Ha before my lap top kicked the bucket. The Ha images wouldn't stack in PI for some reason, probably a setting that would be easily corrected by a pro. They did stack easily and quickly in DSS so I added them to the luminance base shot. Both luminance and Ha images were taken with the camera set to mono obviously. A deviation from Hubble Palette I know but at least the Ha is in there in the traditional icky green. Well pleased.

Revision 3 - Changed Ha layer from green to red to reflect the usual color palette of the swan and to bow to popular opinion.

Revision 4 - Having not spent too long on the green to red change, I hadn't noticed that the nebulousity was considerably flatter then in rev 2. I spent some time playing with brightness, contrast, levels, curves and opacity of the Ha layer before I was somewhat satisfied.

Comments

Author

msoutham
Michael Southam
License: Attribution-NonCommercial-ShareAlike Creative Commons
4892
Like

Revisions

  • M17 Swan Nebula, 





    
        

            Michael Southam
    Original
  • M17 Swan Nebula, 





    
        

            Michael Southam
    B
  • M17 Swan Nebula, 





    
        

            Michael Southam
    C
  • M17 Swan Nebula, 





    
        

            Michael Southam
    D
  • Final
    M17 Swan Nebula, 





    
        

            Michael Southam
    E

Sky plot

Sky plot

Histogram

M17 Swan Nebula, 





    
        

            Michael Southam

Made possible by

O'Telescope BackyardEOS