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Palomar 4  a small globular cluster, 


            Riedl Rudolf
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Palomar 4 a small globular cluster

Technical card

Dates:March 22, 2020

Frames: 42x302" ISO1600

Integration: 3.5 hours

Darks: ~25

Flats: ~25

Bias: ~25

Avg. Moon age: 27.84 days

Avg. Moon phase: 3.21%

Bortle Dark-Sky Scale: 4.00

Mean SQM: 21.50

Temperature: -2.00 job: 3345978

RA center: 11h 28' 56"

DEC center: +28° 49' 53"

Pixel scale: 0.582 arcsec/pixel

Orientation: -62.982 degrees

Field radius: 0.275 degrees

Resolution: 2828x1889

Locations: Home, St. Peter/O., Steiermark, Austria

Data source: Backyard


Palomar 4 is a small globular cluster in UMa. The size of the cluster is 2 arcmin only with brightest Stars mag 18! He is in a distance of 330.000 Lj which is farther away than the Magellanic clouds.
There are 15 such clusters on the Palomar list, all of them a challenge.
The bright and almost big Galaxy in the center of the field ist 2MFGC 8985 from the Simbad catalog. The size of the Galaxy is 30 x 9 arcsec only!!
There are plenty of other Galaxies in the background. On the right side in the middle is a group of really very distant galaxies where I could find some names in the Simbad Catalog, but no further details.
The picture is a crop from the original FF Nikon, otherwise the Galaxies and the GC would be too small! Nevertheless itsworth to go to full resolution to see all the faint fuzzies!



Riedl Rudolf
License: None (All rights reserved)


  • Final
    Palomar 4  a small globular cluster, 


            Riedl Rudolf
  • Palomar 4  a small globular cluster, 


            Riedl Rudolf


Description: Almost full field of view

Sky plot

Sky plot


Palomar 4  a small globular cluster, 


            Riedl Rudolf