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Contains:  M 4, NGC 6121
Getting plate-solving status, please wait...
M4 in Scorpius, 


            Michael Feigenbaum
M4 in Scorpius

M4 in Scorpius

Technical card

Imaging telescope or lens:Vixen R200SS

Imaging camera:ZWO ASI 183MC Pro (cooled)

Mount:Orion HDX110 EQ-G

Guiding telescope or lens:ZWO 30F4 Guidescope

Guiding camera:ZWO ASI 120 MC


Filter:Baader UV/IR-Cut/L Filter

Resolution: 3864x3297

Dates:May 31, 2019

Frames: 200x60"

Integration: 3.3 hours

Avg. Moon age: 26.57 days

Avg. Moon phase: 9.60% job: 2721504

RA center: 245.898 degrees

DEC center: -26.517 degrees

Pixel scale: 0.617 arcsec/pixel

Orientation: 218.775 degrees

Field radius: 0.435 degrees

Locations: Papago Butte, near Maricopa, AZ, United States

Data source: Backyard


Messier 4 located in one of my favorite parts of the sky within the Ophiucus Cloud complex. I think not too many folks image this alone simply because of all the other very interesting and beautiful objects that are all in close proximity.

This loosely concentrated globular has an estimated age of 12.2 to 13 billion years and lies approximately 7,200 ly away. There is evidence of at least 2 different stellar populations within this cluster which would mean there were multiple cycles of star formation.

Of particular interest to me is that in 2003, a large planet about 2.5 Jupiters in mass was discovered orbiting a binary system containing a white dwarf and a pulsar. One could only imagine the view of this system.

The information above was obtained from

Not the easiest to process for some reason. I had some strange issues with calibration files. I went with a bias toward the red because of the general morphology of this area.

Comments and criticism always welcome and Clear Skies to everyone!




Michael Feigenbaum
License: None (All rights reserved)

Sky plot

Sky plot


M4 in Scorpius, 


            Michael Feigenbaum

In these public groups

Cloudy Nights
Fast Newtonians