2020f3 20200722 ndj

This shows a field of view of 33x22 arcmin processed using a Larson-Sekanina filter with r=2, th=10 deg. There are 9 frames each of around 330s duration (from 2143 - 2228). You can clearly see motion in the tail and material spiraling out from the centre of the coma. The small black dot at the centre of the coma is the reference pixel for the filter. I have done quite a few experiments with this data and I think the parameters I have chosen are the best compromise to show detail and motion (i.e. around 300s integrations and L-S with r=2, th=10). It always amazes me that so much relative motion is visible in active comets over such a short period of time.

Page last updated: Fri 18 Sep 21:17:59 BST 2020