Technical Data
|
Optics |
Newton 200 mm
(homemade by L. Comolli, F. Riccio and P. Battaglia)
|
Focal Lenght |
1260 mm
|
Focal Ratio |
f/6
|
Corrector |
Baader MPCC
|
Exposure Time |
4h20m (single
exp of 10 min)
|
CCD |
Canon EOS 5D
with baader filter
|
Sensitivity |
800 ISO
|
Location |
Bogli (PC,
Italian Appennines) at 1350 m height
|
Date
|
1-2 April
2011
(two nights)
|
Mount |
Gemini G-41
|
Tracking |
Lodestar on
an 80mm
f/5 refractor
|
Temperature
and humidity |
T= +8°C,
RH=40-50%
|
Sky brightness at zenith (with SQM-L) |
21.2-21.4 mag/arcsec^2 |
Notes |
Very faint
object to image with a DSLR. The single exposures show only a noisy
patch of nebula.
Some
wind
made the guiding inaccurate and the stars less than perfect.
Thanks to Daniele
Cipollina for some hints about processing.
|