Hemisphere:  Northern  ·  Constellation: Canes Venatici (CVn)  ·  Contains:  IC 913  ·  M 106  ·  NGC 4248  ·  NGC 4258
M106 - First steps in Ha !, 



    
        

            Ewam
M106 - First steps in Ha !
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M106 - First steps in Ha !

Acquisition details

Dates:
May 16, 2015
Frames:
72×195(3h 54′)
Integration:
3h 54′
Avg. Moon age:
27.70 days
Avg. Moon phase:
3.74%

Basic astrometry details

Astrometry.net job: 648570

RA center: 12h18m47s.10

DEC center: +47°1955

Orientation: -69.068 degrees

Field radius: 0.394 degrees

Resolution: 620x463

File size: 147.8 KB

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

Description

VERSION C & D > NEW acquisition from 23:00 on late Sunday the 17th till around 2:00am...

Look at the gain in detail within the core mainly !

VERSION A & B : Here is my previous work on M106 with this last night's Ha acquisition. I still have issues on the background stars being "polluted" by the red halo - should probably not use it at all. It also grabs any high layers of even the thinnest clouds, so I had to through some subs... Noise level was high with the warm spring night, so I spent more than an hour just to clean this.

Same spec as in previous + 9x 450 sec @ 3200

> VERSION E : more subs (Ha & broadband) and heavy crop.

> VERSIN D : maybe C looks more "natural" but I wanted to regain the color contrast achieved on the previous attempt, without destroying too much the "purity" of the grain...

> VERSION C : last night (the 18th) we had a couple of hours of "one of these skies!" - a rare near perfect (belgium) seeing. I could take 16 subs of 150 sec @ 1600, of which I used the 10 best ; then I put on the Ha filter and grabbed another 16 but only 8 proved useful...

As a near beginner (although obsessive worker), I must confess that I'm quite pleased with this work now !

Comments

Revisions

  • M106 - First steps in Ha !, 



    
        

            Ewam
    Original
  • M106 - First steps in Ha !, 



    
        

            Ewam
    B
  • M106 - First steps in Ha !, 



    
        

            Ewam
    C
  • M106 - First steps in Ha !, 



    
        

            Ewam
    D
  • Final
    M106 - First steps in Ha !, 



    
        

            Ewam
    E

Sky plot

Sky plot

Histogram

M106 - First steps in Ha !, 



    
        

            Ewam