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
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

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.



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...