3000x2000
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This faint nebula is in the Milky Way,
in Cepheus, 5° east of the more famous IC1396. Composed of a
brighter central region and a fainter halo, very difficult to image
because of lots of stars that reduce the visibility. A big arc is at
the west side, and within this arc some dark nebulas are present,
catalogued as Barnard 369.
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| Optics | Schmidt
camera 400/300/615 (Zen optics) |
| Focal Lenght | 615 mm |
| Focal Ratio | f/2,0 |
| Exposure Time | Total 10.5
hours. 126 frames of 5 min
each. |
| CCD | A camera with Kaf-6303e |
| Sensor | Kaf-6303e class 1 |
| Filters | H-alpha 6nm
Astronomik, selected for f/2 |
| Chip
temperature |
-30°C and
-20°C |
| Location | Tradate
(VA,
in Pianura
Padana, Italy) at 300m height |
| Date and time of exposure start | 3 full nights: 19, 20, 21 september 2007 |
| Mount | Astrosystems
fork mount |
| Tracking | Webcam
Vesta
Pro B/W on a 120mm f/13 refractor reduced at f/5 |
| Temperature and humidity | T=between 13
and 20°C, RH=between 60 and 80% |
| Sky brightness at zenith (with SQM-L) | 18.5 - 19.0 mag/arcsec^2 |
| Notes | |
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