Hemisphere:  Northern  ·  Constellation: Coma Berenices (Com)  ·  Contains:  M 53  ·  NGC 5024  ·  NGC 5053
Two Globulars for the Price of One, 


            Scott Davis
Two Globulars for the Price of One
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Two Globulars for the Price of One

Technical card

Imaging telescopes or lenses: Explore Scientific ED102 APO

Imaging cameras: Canon EOS Rebel T3i

Mounts: Celestron CGEM Hypertuned

Guiding telescopes or lenses: Orion ShortTube 80

Guiding cameras: Orion StarShoot Autoguider

Focal reducers: Astro-Tech AT2FF

Software: Sequence Generator Pro  ·  DeepSkyStacker  ·  Photoshop CS6

Filters: One-Shot Color

Accessory: Robofocus  ·  Home Made Peltier Cooler for T3i

Dates:April 10, 2015

Frames:One-Shot Color: 23x150" (57' 30") ISO1600

Integration: 57' 30"

Darks: 7

Flats: 40

Flat darks: 40

Bias: 40

Avg. Moon age: 20.45 days

Avg. Moon phase: 67.64%

Bortle Dark-Sky Scale: 3.00

Basic astrometry details

Astrometry.net job: 598976

RA center: 13h14m34s.1

DEC center: +17°5757

Pixel scale: 2.164 arcsec/pixel

Orientation: -3.865 degrees

Field radius: 1.084 degrees

Resolution: 620x414

Locations: Ahwahnee Hills Observatory, Ahwahnee, California, United States


Sometimes having a wider field of view, such as the one afforded to me by my Explore Scientific ED102 Refractor, has its advantages. This is one of those cases: not only was I able to capture two globular clusters in the same field of view, but the two objects are also very different from each other.

Messier 53, also catalogued as NGC 5024, is at the left side of this image. It is one of the more outlying globular clusters, residing at a distance of approximately 58,000 light years from Earth and approximately 60,000 light years from the Galactic Center.

On the right side of this image is a much more loosely bound globular cluster, NGC 5053, which lies approximately 53,500 light years from Earth.

Finally, we have the galaxy PGC 46161, which is just down and to the left of NGC 5053.


Sky plot

Sky plot


Two Globulars for the Price of One, 


            Scott Davis