Occultations of PPM Stars by Neptune

plot of radial closest approach vs.  time

Bigger circles are brighter stars.
A table of this data is also available

From 100 Years of Occult ations: A Statistical View by Douglas J. Mink
Presented at the 1995 meeting of the Division on Dynamical Astronomy of the American Astronomical Society in Yosemite National Park, April 1995.