A second view to the comet Neat after dusk with some less transparency but more exposure time;
105mm TMB refractor with flattener at f/6.5
About this Image
Again an extended coma with still fainter dust tail and better visible ion tail. This image is a blending of star and comet aligned images.
Below there is a conventional view with a set of 17 L raws centered on the nucleus with the frames streightly averaged.
This view provides much more details in the tail.
At bottom a crop of the middle image has been filtered with a Larson-Sekanina filter to show the shock waves ahead of the nucleus.
Technical Details
Optics
Mount
MK-100 GEM
Camera
SBIG STL-11000M at -20C, internal filter wheel
Filters
Astronomik LRGB
Date
May 10, 2004 19:55-20:25 UT.
Location
Wildon/Austria
Sky Conditions
mag 5 sky, good transparency, temperature 10 C
Exposure
Top: L:R:G:B= 1:2:2:2 minutes (1-min sub-exposures);
Middle: L = 17 minutes (1-min sub-exposures); all binned 2x2.
Processing
Image calibration, aligning on stars, average stacking (top); median stacked image aligned on the nucleus and added to the first one;
average aligned on the nucleus (middle); color synthesis, DDP in ImagesPlus;
color balance, curves in Photoshop; north is up;