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Contains:  IC 443
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IC 443 - 0-III, Ha, Broadband : The Medusa Nebula appearing !, 





    
        

            Ewam
IC 443 - 0-III, Ha, Broadband : The Medusa Nebula appearing !

IC 443 - 0-III, Ha, Broadband : The Medusa Nebula appearing !

Technical card

Resolution: 3166x2608

Dates:May 1, 2015

Frames: 50x215"

Integration: 3.0 hours

Avg. Moon age: 12.31 days

Avg. Moon phase: 93.32%

Astrometry.net job: 641357

RA center: 94.377 degrees

DEC center: 22.682 degrees

Orientation: 176.625 degrees

Field radius: 0.580 degrees

Locations: La Gueule du Loup (Malonne), Namur, Namur, Belgium

Description

Finaly, I got round to reprocess all the subs I ever took (4 nights) of this crescent I couldn't quite capture so far. This is in no way a master piece but compared to my first edition... See here, if you care : http://astrob.in/170072/G/
It is heavily croped, due to my early negligence to keep the same framing of the target !
The list of subs is so "eclectic" that it defies good sense, but as nothing seemed to work, I kept trying different settings.
VERSION B : Radical change in the mix ; endless compromises... I thing the right way will be the "Hubble palet" with my 3 filters, and forget the lum.
In brief, there are 3 sets of O-III subs, from 300 to 420 sec, from 2000iso to 3200iso ;
2 sets of UHC subs @ 330 & 420 sec ;
3 sets of broadband, from 45 sec to 3 minutes ;
1 short set of Ha @ 450 sec... Experience this summer reveals, I'll need to push it to 600'' and get twice as much frames.
Last session was quite hard, with the nebula low down in the early evening...

Next year, I'll do a full Ha - SII - O-III session with hopefully better result.

Comments

Author

Ewam
Ewam
License: None (All rights reserved)
2440
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Revisions

  • IC 443 - 0-III, Ha, Broadband : The Medusa Nebula appearing !, 





    
        

            Ewam
    Original
  • Final
    IC 443 - 0-III, Ha, Broadband : The Medusa Nebula appearing !, 





    
        

            Ewam
    B

Sky plot

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IC 443 - 0-III, Ha, Broadband : The Medusa Nebula appearing !, 





    
        

            Ewam