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Contains:  NGC 6166
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Abell 2199 Hercules NGC6166, 


Abell 2199 Hercules NGC6166

Abell 2199 Hercules NGC6166

Link to TIFF/FITS:

Technical card

Resolution: 1786x1322

Dates:May 6, 2018May 7, 2018May 8, 2018

Frames:Optolong L-Pro 2" Nikon T-Ring: 27x600" ISO800 bin 1x1

Integration: 4.5 hours

Darks: ~35

Flats: ~30

Bias: ~150

Avg. Moon age: 21.62 days

Avg. Moon phase: 55.50%

Bortle Dark-Sky Scale: 3.67

Mean SQM: 20.53

Mean FWHM: 5.00

Temperature: 16.33 job: 2053572

RA center: 247.185 degrees

DEC center: 39.533 degrees

Pixel scale: 1.628 arcsec/pixel

Orientation: 44.325 degrees

Field radius: 0.503 degrees

Locations: Meldert @Home, Hoegaarden, Vlaams Brabant, Belgium

Data source: Backyard


Doesn't look much at first sight - no spectacular Messier objects to find anywhere!

I could verify with SIMBAD and ALADIN the limiting magnitude in this image which is betond 20. One little galaxy had a SIMBAD g value of 20,059.

More on my website:

Please look at the larger image to find pile of dozens of little galaxies. A lot of the 'fuzzy stars' turn out to be galaxies!

Abell 2199 is a cluster of galaxies - situated to the upper right of the Hercules keystone.

The brightest member is NGC6166 (with 4 components A,B,C & D), magnitude 11, all others are down to magn. 16 - 17 range and beyond. Distance 50 million LY. Abell 2199 is a prime example of the missing mass enigma. In total there should be thousands of galaxies...

How many galaxies can you count? You need to zoom in! I found almost 200 in this image, not counting any 'suspicious' stars.

Tracking was not always excellent during all sessions (I had now 6 consecutive nights of imaging from home, something only outdone by France holidays imaging, 4 last nights were used for this object).



License: Attribution-NonCommercial-NoDerivs Creative Commons


  • Abell 2199 Hercules NGC6166, 


  • Final
    Abell 2199 Hercules NGC6166, 



Sky plot

Sky plot


Abell 2199 Hercules NGC6166,