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16 December 2013, 5.33 UT (mean of L exposures), TEC
140, LRGB total exp 34.5 min (L=5x300s, RGB=3-3-3x120s + 7x30s for nucleus), SBIG STL-11000, from my light
polluted home in Tradate (VA, Italy), see below for more details.
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31 December 2013, 5.25 UT (mean of L exposures), TEC
140, LRGB total exp 35 min (4-1-1-1x300s), SBIG STL-11000, light crop, very hazy sky, from Bogli (at 1350 m height, Italian Apennines), see below for more details.
Technical Data
|
| Optics |
TEC 140 (except the wide field one with the Pentax 165 mm lens)
|
Focal Length
|
1011 mm
|
| Focal
Ratio |
f/7.2
|
| Exposure
Time |
see captions
|
| CCD |
SBIG STL-11000
|
Chip temperature
|
From Tradate: -35°C (except one at -30°C) | From Bogli: -40°C
|
| Location |
Tradate (VA, Italy, at 305 m height | Bogli (PC, Italian Apennines) at 1350 m height
|
Date
|
see captions
|
| Mount |
Schmidt fork mount
|
| Tracking |
On the comet head
|
| Temperature
and
humidity |
T= mostly 0°C, RH= mostly 100%
|
| Sky brightness at
zenith (with SQM-L) |
19.2-19.6 from Tradate | 20.8 from Bogli
|
| Notes |
- |
