Neat!
It’s interesting that, some years ago, someone retrocalculated the orbits of Halley’s Comet using the greater amount of direct observation since Halley’s time, and found that, around 2000 years ago, assuming no big bumps in the road, Halley’s passed so close to the Earth that the calculations couldn’t even distinguish which side of the Earth it passed, iow, as if the Comet sprang from the Earth in the first place. :’)