2019o3 20210615 rroberto

comet observed on the night between 14 and 15 June is C/2019 O3. Surprising to see at that distance from the Sun and the Earth a comet of mag 16.0 (diameter 13".4 ie 10 pixels) with a tail of 40". 
The image is the median/sum of 24x90s with north perfectly on top and east on the left (field of 22'.8x28'.5).
The telescope is a 369mm Cassegrain reduced to F / 6.66.