You know, you don't get really a feeling and I was thinking well Let's take a particular example like this one here 2021 wp what a nice name and let's see how many miles or kilometers it flies as a flyby Right and this applies not only for this object applies for several other objects. If you know how to compute these things if you know your Medplotlib routines and so on then you get a maybe better feeling and understanding that sometimes a close flyby lets say it's not that close, right?