The exposure time was 25 minutes, with binning 2x2 giving a scale of 0.425 arc-second per pixel. This filter is not a perfect continuum filter, but as the sky transparency was rapidly declining, broadband was needed. It is possible to see on this image taken with the 1 metre telescope small knots in the jet of the comet. It is possible to see on this image taken with the 1 metre telescope small knots in the jet of the comet. First detection of the nuclear rotation These six images are taken with a HiSis 44 camera build with a Kodak KAF 1600 CCD device on March 19th.
North is up and west is on the right.
We have substracted a radial profile from each image to enhance the asymmetric details. Two curved jets are present on most of the frames. This long observation run allow us to give the first explanation of the moving jet observed at ESO 3.5m NTT and at Pic du Midi on february 10th. Two jets are visible on most of the frames. It is clear that the activity begins at morning limb near PA 200 deg, is maximum at noon near PA 95 deg, and disappears at evening limb near PA 350 deg.