Hemisphere:  Southern  ·  Constellation: Scorpius (Sco)  ·  Contains:  M 4  ·  NGC 6121
Messier 4 - A reddish globular cluster, 



    
        

            deppski
Messier 4 - A reddish globular cluster
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Messier 4 - A reddish globular cluster

Equipment

Imaging Telescopes Or Lenses
Vixen R-130S f/5 Newton
Imaging Cameras
Canon 350d Astromod Baader AFC2 Filter
Mounts
Vixen Great Polaris

Acquisition details

Dates:
June 27, 2014
Frames:
60x18" (18')
Integration:
18'
Avg. Moon age:
0.16 days
Avg. Moon phase:
0.03%

Basic astrometry details

Astrometry.net job: 309286

RA center: 16h23m30s.7

DEC center: -26°3133

Pixel scale: 2.626 arcsec/pixel

Orientation: 88.071 degrees

Field radius: 0.470 degrees

Resolution: 620x580

Description

The two closest M4 got a reddish color, because its light passes a lot of interstellar dust.

I did this snapshot without guiding. 130/700mm Newton, 60 x 18s exposures ISO1600.

Comments

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Messier 4 - A reddish globular cluster, 



    
        

            deppski