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FROM THE OBSERVATORY · 04-Jul-2020

Messier 68

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Messier 68
M68 is a globular cluster at a distance of about 33,000 light-years away from Earth.
BEHIND THE IMAGE

Notes from the session

The cluster may be undergoing core-collapse, and it displays signs of being in rotation. The cluster may have been acquired by the Milky Way galaxy through accretion from a satellite galaxy. (Source: Wikipedia)

Image:
49x 180s Red
40x 180s Green
46x 180s Blue


Total integration 6 hours 45 minutes. Focal length: 1960mm

Hardware:
Celestron 11" EdgeHD
Skywatcher EQ8 Pro mount
QSI 683-ws8 Camera @ -15°C
Astrodon RGB Gen2 E-Series Tru-Balance filters
Starlight Xpress Lodestar X2 Autoguider
Innovations Foresight ONAG
Starlight Instruments Feather Touch Focuser



Location:
Exposed over 3 nights between 5th to 12th April 2020
Orange zone in Brisbane, Australia. (Bortle 7)



Software:
Planning & camera alignment with Aladin 10
Captured with TheSkyX Professional
Guiding with PHD2
PixInsight: Calibrate, align, integrate, dynamic background extraction, RGB combination, noise reduction, photometric color calibration, masked stretch, curves, crop.