If this crop circle depicted an impact area it would be much too large, according to many circles in the past (see Section 5 of my ebook). Otherwise. it indicates two types of gas in the coma as the comet approaches the Sun, rounds it, and heads for Earth impact. This unusually simple circle is most likely Comet A in its trajectory toward Earth impact. Its simplicity is suspicious (perhaps a  man-made specimen) after so many prior circles have been the opposite

Kenneth Heck