old data

Guy and I debriefed after the NOVA course. When the subject turned to the Chicago asteroid occultation, he explained that the star chart data is increasingly old. We need a new survey so to get updated proper motions for stars. Still, it's better than pre-Hipparcos. At any rate, this might account for some of the increasing number of misses.

Hopefully, Gaia will launch next summer...

He has yet to analyse the light curves in his video recording.