The Lost Object page provides information
of possibly lost TNOs and Centaurs and previous recovery attempts.
The Requests for Collaboration page is
provided by observers interested in coordinating observations, researchers
looking others to contribute to projects or proposals, etc.
F. Marchis and J. Berthier provide a web page with Appulse
Events for TNOs and Centaurs, which may be of use for observations with
adaptive optics.
Below are web pages supplied by observers listing their past and present
observing runs, objects they have observed, etc., so that others may coordinate
runs and observing lists.