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Tuesday, June 15, 2010

M20, the "Triffid nebula", more lights added

M20, the "Triffid Nebula" in constellation Sagittarius. Distance about 7600 light years.
Less compressed versions in my Portfolio:

This is a third version of the M20. Image gets deeper and deeper as more exposures gets added.
Previous versions can be seen here:

An experimental Starless version to show the actual nebula.

M20, imaged with a Northern Galactic members remote telescope in Australia,

Impressive instrumentation and great location in Souther Australia under a dark Sky, makes possible to go deep in very short time! 

Technical details

16" RCOS ja Apogee U9000 camera. 
LRGB combo.
LRGB-image, Luminance=5x300s + 5x600s, total 1h 15min.
 Red=3x300s, Dark and Flat calibrated. 
Green=3x300s, Dark and Flat calibrated.
Blue=3x300s + 1x600s, Dark and Flat calibrated.
Raw data is shared with Petri Kehusmaa and J-P Metsavainio

Processing workflow:
Image acquisition, MaxiDL
Stacked and calibrated in CCDStack.
Deconvolution with a CCDSharp, 30 iterations.

Levels, curves and color combine in PS CS3.

Cropped image at 100% scale

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