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Click for hires
47
Tucanae (aka NGC 104) is the second largest globular cluster of the sky, second only
to Omega Centauri. It lies in the sky very near to the Small Magellanic
Cloud, but is much nearer. For a comparison with other great clusters, see here.
Here is a 63% cropped view.
Here is a 63% cropped view.
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| Optics | Takahashi FS152 apo refractor |
| Focal Length | 1216 mm (direct focus, no flattener) |
| Focal Ratio | f/8 |
| Exposure Time | 49 min
(4x10 min + 9x1 min) |
| CCD | Canon
EOS 5D with Baader filter |
| Sensitivity | 800 ISO |
| Location | Tivoli Farm
(Namibia) at 1350 m height |
| Date |
25 August 2011 |
| Mount | Fornax 51 |
| Tracking | SXV-H5 on a Vixen 80/640 apo refractor |
| Temperature and humidity | T= +0°C, RH=62% |
| Sky brightness at zenith (with SQM-L) | 21.5 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. |
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