The linked blog post at http://findplanetnine.blogspot.com/2021/02/is-planet-nine-finally-dead.html http://findplanetnine.blogspot.com/2021/02/is-planet-nine-fi

The linked blog post at http://findplanetnine.blogspot.com/2021/02/is-planet-nine-finally-dead.html http://findplanetnine.blogspot.com/2021/02/is-planet-nine-fi... has some more detail, though it's from the proponents of the theory rather than someone trying to be neutral. It looks like there are two things going on: - With the current set of observations, the evidence for clustering is fairly strong, but well short of strong enough that it can't just be chance. - The new survey was including one data point (which doesn't fit in the 'cluster') that Mike Brown doesn't think counts [1]. With the numbers involved, it seems to me that one additional data point is likely to be making a big difference. [1] « there is one additional object that Napier et al. include that was never reported to the Minor Planet Center; we restrict our analysis to objects whose detection history we can track; that one unreported object is down in the lower left of the lefthand plot »