Hemisphere:  Northern  ·  Constellation: Ursa Major (UMa)  ·  Contains:  Bode's nebulae  ·  M 81  ·  M 82  ·  NGC 3031  ·  NGC 3034
Very first light on M81 and the Cigar Galaxy, 



    
        

            Ewam
Very first light on M81 and the Cigar Galaxy
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Very first light on M81 and the Cigar Galaxy

Acquisition details

Dates:
March 11, 2015
Frames:
46x110" (1h 24' 20")
Integration:
1h 24' 20"
Avg. Moon age:
19.98 days
Avg. Moon phase:
72.27%

Basic astrometry details

Astrometry.net job: 578253

RA center: 09h56m13s.7

DEC center: +69°0845

Orientation: 102.780 degrees

Field radius: 0.726 degrees

Resolution: 620x409

File size: 166.6 KB

Description

> Final (I) VERSION : I found a stack of O-III subs that bring much more detail on M82 and some more dust lanes on M81. I added star spikes for the look... That's it till next acquisition session!

Tonight, I'm very happy to present this work in progress, from this first, quick stack and basic edit, to what I hope will be my best work so far. For this VERSION A I only used 3X 660 second subs in O-III and 17 x 60 sec in broadband @ iso 1600.

I managed to catch a little zoo full of different exposure time, from 40 sec to 720 sec. so I'll be able to experiment... Much work in perspective !

> Final VERSION (E&G) is a mix of broadband only : O-III doesn't add much detail and creates issue with color balance! So, I've been processing each set of exposure till the desired effect and color, then mixed all these five sets together : 5x 40", 23x 60", 12x 90", 3x 150" and 3x 165"...

VERSION C : 3x 660sec in O-III, 3x 120 sec + 23x 60sec in broad band, processed separately and brought together in Photoshop.

VERSION D : the same plus 5x 40 sec and 12x 90 sec @1600 iso

Depth of field, so far can be found stars down to mag. 18.00

Comments

Revisions

  • Very first light on M81 and the Cigar Galaxy, 



    
        

            Ewam
    Original
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    B
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    C
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    D
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    E
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    G
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    H
  • Final
    Very first light on M81 and the Cigar Galaxy, 



    
        

            Ewam
    I

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Histogram

Very first light on M81 and the Cigar Galaxy, 



    
        

            Ewam