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Click for hires
This
molecular cloud is very faint and the brightest part includes the two
blue reflection nebulae NGC 6726. The dark nebula is cataloged as Be
157. Much further lies the globular cluster NGC 6723. .
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| Optics | Pentax 75 apo refractor |
| Focal Length | 500 mm |
| Focal Ratio | f/6.7 |
| Exposure Time | 3 h
(single exp of 10 min) |
| CCD | Canon
EOS 5D with Baader filter |
| Sensitivity | 800 ISO |
| Location | Tivoli Farm
(Namibia) at 1350 m height |
| Date |
31 August 2011 |
| Mount | Kenko NES |
| Tracking | Lodestar with a small refractor (F.L. 100 mm, aperture 23 mm) |
| Temperature and humidity | T= +15°C, RH=28% |
| Sky brightness at zenith (with SQM-L) | 22.0 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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