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Old 15-01-2019, 05:01 PM
Startrek (Martin)
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Location: Sydney and South Coast NSW
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2nd image of Rosette Nebula

This is my second only image of the NGC2244 and the Rosette Nebula down the south coast
50% Moon was up at 60 deg lighting up the sky plus a massive storm out to sea putting on a light show but I decided to image it anyway
49 x 3 minute subs
20 x darks
No flats
No bias
PHD2 guiding at around 1.3 arc sec error ( RA was too high couldn’t get it down )
Registered and stacked in DSS
Processed in Startools
Couldn’t squeeze in the 50th frame as crossing the meridian caught me out
My Canon 600D had a sensor temp reading of 36 deg ( rediculous )
Went a bit light on the colour module
Lots of noise , banding and everything else but cleaned up ok
Cheers
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  #2  
Old 15-01-2019, 08:56 PM
Karlzburg (Karl)
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Looking good Martin, quite a bit of data in there.

Must be the time for PHD to play up in RA, I had similar the other night. Dec was fairly settled but RA was up and down. I had a sub at 41 deg but seemed quite okay when zoomed in.
I found when jumping over the merdian turning the camera 180 degrees works well, I haven't tried seeing if DSS will flip the image for me.
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Old 15-01-2019, 09:23 PM
Startrek (Martin)
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Thanks Karl
Yes over 2 hours of data which you need for this Nebula
Moons washing everything out tonight so just practicing some guiding
Adjusted the counterweights down the shaft about 10mm after re balancing ( east heavy ) guiding is more even now with DEC ( 0.69” )and RA ( 0.80 ) a lot closer
RA agg 70
Hyst 10
Min mo 0.2
Dec agg 70
Min mo 0.2
Mx RA and DEC 2500
Guiding around 1.05 arc sec error which is good for my 6” f6 newt
Cheers
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Old 16-01-2019, 01:04 PM
gb44 (Glenn)
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Looking good Martin. The dust lanes are there. Quite a lot of red - did you tweak the colour saturation much or was that pretty much as is off camera?

GlennB
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Old 16-01-2019, 01:38 PM
Startrek (Martin)
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Thanks Glenn
My Canon 600D is stock ( unmodded ) so I had to Up the red
Plus it was a warm night around 22 deg and the sensor temperature was reading 36 deg , so lots of read noise
It would be great if you could image this Nebula in the winter months with outside air at 9 deg and sensor temperature at 20deg as the image would have more detail and natural colour
Thanks again
Cheers
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