18. 01. 2007, 22:15

This is the comet view at about 22:15 local time if there were no clouds covering the comet and we would be able to look under horizon.

Although the weather was relatively good, there were some clouds above the western horizon. Unfortunately they were all the time just on the comet position. Therefore it was not possible to take one single image of the whole comet. The head of the comet disappeared beyond the clouds at 21:54. The sky was not dark enough at that time to capture the more distant parts of comet's dust tail. Therefore I used totally 12 images taken in time interval 21:53 - 22:16 of local time to reconstruct the whole comet. It was rather complicated work because of the different contrast and color balance caused by gradual dawn. The part of the image marked by the frame consists of totally 7 images - one single image of the head (1.6 s, ISO 500, 5.6/183 mm, 21:53) and 6 images of the nearest part of the tail (5-10 s, ISO 500, 5.6/183mm, 22:01 - 22:04). The majority of the image consists of 5 images (10 s, ISO 3200, 6.3/70mm, 22:14 - 22:16) taken at the time when the comet head was under the visible horizon.

Click on the image or on the following reference to display the higher resolution image version (1.5 MB, PNG format).

Date18. 01. 2007
Time21:53 - 22:16 local time
PlaceTop of a hill near Talca, Chile
OpticsTamron AF 70-300mm F/4-5.6 LD
CameraCanon EOS 5D
ProcessingComposition of 12 images
Copyright© 2007 Miloslav Druckmüller

Miloslav Druckmüller
Institute of Mathematics, Faculty of Mechanical Engineering
Brno University of Technology, Czech Republic
Page last update: 18.3.2008