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Hemisphere:  Southern  ·  Contains:  Herschel's Jewel Box, Mimosa (βCru), NGC 4755, The constellation Crux (Cru), The star Becrux, The star Gacrux (γCru), The star α1Cru, The star α2Cru, The star δCru, The star εCru, The star ζCru, The star ηCru, The star θ1Cru, The star μ1Cru, kappa Crucis Cluster
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Crux and Coalsack Nebula (C99), 


            Luiz Ricardo Silv...
Crux and Coalsack Nebula (C99)
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Crux and Coalsack Nebula (C99)

Technical card

Imaging 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

Basic astrometry details 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.



Luiz Ricardo Silv...
License: None (All rights reserved)


  • Crux and Coalsack Nebula (C99), 


            Luiz Ricardo Silv...
  • Final
    Crux and Coalsack Nebula (C99), 


            Luiz Ricardo Silv...


Description: New version with color improvement

Sky plot

Sky plot


Crux and Coalsack Nebula (C99), 


            Luiz Ricardo Silv...