M92 Globular Cluster in Hercules

"M92 is one of the brightest globular clusters although often overlooked in favour of M13 which also lies in the constellation of Hercules.

 

The cluster is located about 27,000 light-years from Earth, and is thought to be at least 11 billion years old. It contains roughly 330,000 stars with a tightly packed core and has a diameter of about 109 light-years. It has a relative velocity of -112 km/s."

- Leeds Astronomical Society

 

Picture taken using:

 

ZWO ASIAIR Pro

ZWO ASI533MC Pro at -10C

ZWO ASI174MM Mini guidecam on ZWO OAG

Celestron C5 Spotter scope

SkyWatcher EQ6-R Pro

ZWO UV IR Cut filter

 

Captured in Live View, saving every frame:

10 Lights at 300 seconds, gain 100, temp -10C

20 Flats, at 40ms gain 100, temp -10C

50 Bias at 1ms, gain 100, temp -10C

10 Darks at 300 seconds gain 100, temp -10C

 

Bortle 4 sky.

Integrated in Astro Pixel Processor and adjusted in Photoshop CS4.

 

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Done