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This huge comet-like object
is starting from the molecular cloud of Corona
Australis. The "head" is near the IC 4812 and NGC 6726
blue nebulae, and the "tail" bends toward East and
then North. |
The upper-right corner of the
image shows a bright yellow halo. This is not an image
defect! It's the zodiacal light, bright even at more
than 90° from the Sun. (Milky Way center was at
zenith when the astronomical night was beginning). |
The "dark horse" nebula is
easily visible: on the left the "pipe" nebula is the
rear of the horse, while on the left two legs and the
head are visible. |
The regions nearby Antares
are full of great diffuse nebulae of many colors: red,
yellow, orange, blue, brown. Moreover the extension of
the front leg of the dark horse is a very long dark
nebula that reaches Antares. |
The galactic center lies in this field, near the border between the brightest region and the dark band above. On the left M8 and M20 nebulae; on the right M6 and M7 clusters. | The tail of Scorpio is home
for many bright emission nebulae. From the left the
two cat's paws; near the center Zeta Scorpii and IC
4628; on the right Ara and NGC 6188. |
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Optics | Canon lens 50 mm f/1.8 mkII |
Focal Length | 50 mm |
Focal Ratio | f/4 |
Exposure Time | 7h10m
(single exp of 10 min, mosaic of 7 panes, each pane is 1 h exp) |
CCD | Canon
EOS 5D with Baader filter |
Sensitivity | 800 ISO |
Location | Tivoli Farm
(Namibia) at 1350 m height |
Date |
24-25-26-27-28 August 2011 |
Mount | Losmandy G11 |
Tracking | none |
Temperature and humidity | T= from +3 to +15°C, RH=from 20 to 40% |
Sky brightness at zenith (with SQM-L) | from 21.5 to 21.9 mag/arcsec^2
(bright because of the Milky Way at zenith!) |
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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