MPEC 2021-B143 : OBSERVATIONS AND ORBITS OF COMETS AND A/ OBJECTS
MPEC 2019-J142: OBSERVATIONS AND ORBITS OF COMETS (*)
MPEC 2019-G124: COMET C/2019 F1 (ATLAS-Africano) (*)
MPEC 2019-F133: 2019 FC1 (*)