PRELIMINARY VERSION OF THE OBSERVER SUMMARY PAGE FOR 2019 MAY 18 MPC BATCH Here is a PDF version of the preliminary versions of the Observer Summary pages for the latest batch of MPCs. You are warned that these pages are prepared entirely automatically from the header files supplied by observers with their observations. These submitted headers generally require much manual editing before they can be included in the MPCs. Please check the details for your observatory code carefully and report any corrections to mpc@cfa.harvard.edu, with a subject line of "OBSERVER SUMMARY CORRECTION", by: 12:00 UTC Saturday, May 18. It is probable that it will not be possible to deal with any reports made after this date, or with reports that are not sent to the correct e-mail address. If you wish to receive an e-mail notification in future months that these files are ready for inspection, please send an e-mail to mpc@cfa.harvard.edu.