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Contains:  NGC 4120, NGC 4236, NGC4120, NGC4236
Getting plate-solving status, please wait...


Technical card

Dates:March 31, 2019April 1, 2019April 2, 2019

Baader B Filter - 50mm: 100x90" -20C bin 1x1
Baader G Filter - 50mm: 93x90" -20C bin 1x1
Baader L Filter - 50mm: 564x60" -20C bin 1x1
Baader R Filter - 50mm: 92x90" -20C bin 1x1

Integration: 16.5 hours

Avg. Moon age: 26.01 days

Avg. Moon phase: 13.82%

Bortle Dark-Sky Scale: 4.00 job: 2645403

RA center: 12h 16' 30"

DEC center: +69° 28' 24"

Pixel scale: 1.142 arcsec/pixel

Orientation: -127.152 degrees

Field radius: 0.879 degrees

Resolution: 3173x4548

Locations: Lingemeer (backyard @ home), Lienden, Gelderland, Netherlands

Data source: Backyard


NGC 4236.

Unfortunate some stars got messed up a bit, I was playing around with the gain and that probably was not such a wise idea...

I also heard about collecting the blue light near the meridian, I almost have a new data set complete for M 101 and on that set I collected the blue light only near the meridian. Curious to see what that will do... Blue light is the hardest to get right.

Another very interesting point is that this image has been taken with no moon. And I still prefer my previous image which was taking with a full moon (close to 100%). I know that humidity has a lot to do with it as well when the moon is there, but I will just keep collecting data even if the moon is there.



Paul Muskee
License: None (All rights reserved)



Description: tiny increase to black point

Sky plot

Sky plot


NGC 4236 LRGB, 


            Paul Muskee