C/2001 Q4 Neat (May 19)

clic for 70% size 1403 x 935 (200 kB)

About this Image

Comet Neat higher up but at reduced brightness;
Tail and coma are of reduced size, the blue ion tail still shows structure.

At bottom a crop of the above image has been filtered with a Larson-Sekanina filter to show details of the bright nucleus.


Technical Details


105mm TMB refractor with flattener at f/6.5

Mount MK-100 GEM
Camera SBIG STL-11000M at -15C, internal filter wheel
Filters Astronomik LRGB
Date May 10, 2004 20:00-20:30 UT.
Location Wildon/Austria
Sky Conditions mag 5 sky, medium transparency, temperature 17 C
Exposure L:R:G:B=30:4:4:4 minutes (2-min sub-exposures); all binned 2x2.
Processing Image calibration, aligning on nucleus, average stacking;
color synthesis, DDP in ImagesPlus;
color balance, curves in Photoshop; north is up;