Tonight is, I think, the beginning of our last attempt to find Planet Nine with the Subaru Telescope. If it's not in this week's data we'll probably wait for the Vera Rubin Observatory to come on line and revert to those data. But for tonight the skies look clear, the winds are calm, and the area of the sky where we think Planet Nine is most likely to be is perfectly placed. Stay tuned!
@Mikebrown We've been strongly advocating to keep the Northern ecliptic in Rubin Observatory's Legacy Survey of Space and Time footprint partly to ensure this can happen if current searches are not successful at finding Planet Nine. Good luck!
@megschwamb I'm pretty convinced that it is going to take VRO. It's just too hard to do piecemeal