set= - calculates Universal time when the moon's altitude is # degrees above the horizon as it is setting.
ut=hh:mm:ss - uses the universal time specified instead of right now.
date=dd/mm/yyyy - uses the universal date specified instead of today. Note: the ut will be from the system clock if not overridden by the ut option.
geocentric - computes the geocentric apparent position rather than the topocentric value.
noelev - doesn't correct the time of setting for the effects of refraction, the fact that the moon has finite diameter and for the elevation of the observatory (taken from the tel_status command, see Section 5.5.3).