NGC253, Silver Dollar Galaxy

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This galaxy is the most prominent in Sculptor and is nicknamed "Silver Dollar" due to the shape.


Zoom at 66% resolution.

Technical data
Optics Takahashi FS152 apo refractor
Focal Length 1216 mm (direct focus, no flattener)
Focal Ratio f/8
Exposure Time 2 h 40 min (16x10 min)
CCD Canon EOS 5D with Baader filter
Sensitivity 800 ISO
Location Tivoli Farm (Namibia) at 1350 m height
Date
27 August 2011
Mount Fornax 51
Tracking SXV-H5 on a Vixen 80/640 apo refractor
Temperature and humidity T= +6°C, RH=42%
Sky brightness at zenith (with SQM-L) 21.8 mag/arcsec^2
Notes This image is a collaborative effort of the Namibia 2011 expedition. Processing: Lorenzo Comolli. Images by: Lorenzo Comolli, Luigi Fontana, Giosuè Ghioldi, Emmanuele Sordini.


HTML Editing and Publishing by Lorenzo Comolli. Email me at comolli@libero.it.
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