Celestial hemisphere:  Northern  ·  Constellation: Canes Venatici (CVn)  ·  Contains:  M 51  ·  NGC 5194  ·  NGC 5195  ·  Whirlpool galaxy
M51 - a more detailed Whirlpool , 



    
        

            Ewam
M51 - a more detailed Whirlpool
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M51 - a more detailed Whirlpool

Acquisition details

Dates:
April 10, 2015
Frames:
105×136(3h 58′)
Integration:
3h 58′
Avg. Moon age:
20.45 days
Avg. Moon phase:
67.64%

Basic astrometry details

Astrometry.net job: 599909

RA center: 13h29m51s.4

DEC center: +47°1825

Orientation: 111.522 degrees

Field radius: 0.414 degrees

Resolution: 620x547

File size: 243.0 KB

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

Description

This image - VERSION H - is a tribute to 3 guys up here who helped in my moving forward : moonrocks for his time and efforts to drag me into Ps (good move!), Paddy Gilliland for his interest and tips (PixIn) sent in PM, and ItalianJobs for his gallery (something in his style made me curious...)

> VERSION H : full reprocessing of my sub-groups, de-noise, local contrast, color layers, ... Hours on this one :-) This is it ... until stable sky and more data ;-)

> VERSIONS E - F - G : 3 night's acquisitions are in here :

All my subs stacked together in 3 groups than processed : 34 x 90 sec + 54 x 75 sec + 17 O-III x 420 sec ; there is a bit too much noise and dusts in the background, but I wanted to punch detail visibility to the maximum.

VERSION D : added 20 subs in the mix. Next version, will start from scratch with all best subs...

VERSION B : next night was another chance to grab more subs... Here is a first selection out of 85.

TECH SPEC :

O-III :

> 17 x 420 sec ;

Broadband :

> 54 x 75 sec ;

> 34 x 90 sec ; all @ iso3200

(First 3 version, only 20 Bb + 17 O-III)

Comments

Revisions

  • M51 - a more detailed Whirlpool , 



    
        

            Ewam
    Original
  • M51 - a more detailed Whirlpool , 



    
        

            Ewam
    B
  • M51 - a more detailed Whirlpool , 



    
        

            Ewam
    D
  • M51 - a more detailed Whirlpool , 



    
        

            Ewam
    E
  • M51 - a more detailed Whirlpool , 



    
        

            Ewam
    F
  • M51 - a more detailed Whirlpool , 



    
        

            Ewam
    G
  • Final
    M51 - a more detailed Whirlpool , 



    
        

            Ewam
    H

Sky plot

Sky plot

Histogram

M51 - a more detailed Whirlpool , 



    
        

            Ewam