Hemisphere:  Northern  ·  Constellation: Hercules (Her)  ·  Contains:  Hercules Globular Cluster  ·  M 13  ·  NGC 6205  ·  NGC 6207
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The Great Cluster in Hercules, 



    
        

            Damien Cannane
The Great Cluster in Hercules
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The Great Cluster in Hercules

Getting plate-solving status, please wait...
The Great Cluster in Hercules, 



    
        

            Damien Cannane
The Great Cluster in Hercules
Powered byPixInsight

The Great Cluster in Hercules

Technical card

Imaging telescopes or lenses: Celestron RASA 8"

Imaging cameras: ZWO ASI183MC Pro

Mounts: Orion Atlas EQ-G

Guiding telescopes or lenses: Orion Mini 50mm Guide Scope

Guiding cameras: ZWO ASI224MC

Software: Pleiades Astrophoto PixInisight  ·  ZWO ASIAIR PRO ASIAIR PRO  ·  Photoshop CC

Filters: Astronomik L-2 UV-IR Block

Accessory: ASIair Pro


Dates:April 23, 2021

Frames:Astronomik L-2 UV-IR Block: 193x20" (1h 4' 20") (gain: 111.00)

Integration: 1h 4' 20"

Avg. Moon age: 10.63 days

Avg. Moon phase: 81.85%

Bortle Dark-Sky Scale: 6.00


Basic astrometry details

Astrometry.net job: 4466038

RA center: 16h 41' 51"

DEC center: +36° 27' 57"

Pixel scale: 1.241 arcsec/pixel

Orientation: 270.087 degrees

Field radius: 1.140 degrees


Resolution: 5496x3672

Locations: My Back Yard, Copley, OH, United States

Data source: Backyard

Description

Everyone in astronomy knows this cluster. It is probably the greatest example of a globular in the northern sky, but not everyone notices IC 4617, the tiny galaxy about 14' away. This galaxy is so small because it is very distant, a whopping 540,000,000 light-years away and receding from us at an astonishing 10,933 kilometers per second - or 3.6% of the speed of light!

Source: Sky Safari

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