Animation of single images, tracking on the comet, flat and dark corrected.
Animation of processed images, stars removed by subtracting from the single images a median combine aligned on the stars.
This
comet Lovejoy produced a stunning show because of its ion tail moving
very fast as the comet moves into the Sun interplanetary field. This
animation shows two hours of movement. The waves in the tail are much
more apparent in the second processing, with stars removed.
|
Technical Data
|
| Optics |
TEC 140
|
Focal Length
|
1011 mm
|
| Focal
Ratio |
f/7.2
|
| Exposure
Time |
Single images of 5 min, total o 19 images |
| CCD |
SBIG STL-11000M @-40°C
|
| Location |
Capanne di Cosola (AL, Italian Apennines) at 1500 m height
|
Date
|
24 January 2015
|
| Mount |
Gemini
G-41
|
| Tracking |
Lodestar
on an 80mm f/5 refractor
|
| Temperature
and
humidity |
T= -3 °C, RH=75 %
|
| Sky brightness at
zenith (with SQM-L) |
20.7-21.0 mag/arcsec^2
|
| Notes |
Clear sky. Tracking on the comet. Crescent Moon brightens the sky.
|
