To convert MPCORB.DAT to a oorb format:
oorb --task=mpcorb --mpcorb=MPCORB.DAT --orb-out=MPCORB.orb
To propagate MPCORB.orb to a desired date:
oorb --task=propagation --orb-in=MPCORB.orb --epoch-mjd-utc=59580.173 --orb-out=MPCORB_START_59580.orb
To generate ephemeris from desired date onwards: