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I agreeImaging telescopes or lenses:Nikkor 135mm f2.8 AI
Imaging cameras:Nikon D5000
Mounts:Ioptron CEM25P
Guiding telescopes or lenses:ZWO 60/280 Guiderscope
Guiding cameras:QHYCCD QHY5L-Ⅱ-c
Software:Adobe Phosotshop CC , Deep Sky Stacker 3.3.3 Beta 51
Dates:June 24, 2020
Frames: 96x60" ISO400 bin 1x1
Integration: 1.6 hours
Darks: ~50
Flats: ~50
Bias: ~50
Avg. Moon age: 3.29 days
Avg. Moon phase: 11.76%
Bortle Dark-Sky Scale: 5.00
Astrometry.net job: 3652265
RA center: 12h 33' 37"
DEC center: -61° 4' 51"
Pixel scale: 8.394 arcsec/pixel
Orientation: 353.596 degrees
Field radius: 5.677 degrees
Resolution: 2701x4051
Locations: Sweet home, Joinville, Santa Catarina, Brazil
Data source: Backyard
The Crux constellation and the Coalsack Nebula (C99) captured with an old DSLR.
My Nikon D5000 have a serious issue with its sensor. On the right corner and top of the image we can see it failure. A region of the sensor which does have a lack of sensitivity.
First I though it was a "flat frame issue", but it's not. Darks and bias doesn't help.
Only after a carefully processing I'm "ok" in posting this picture. But my Nikon D5000 is old, and I'm not happy to say that it needs to retire.
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