Cycles of NEO Passages

[PMSchu]

Might it be that around the equinoxes, the nights are approximately equal length in both northern & southern hemispheres. That would give scopes in both hemispheres ~10 hours/night to make their observations. Full moon really hammers the number of new NEOs that are reported by the MPC each day. Since we're near Harvest Moon, there have been several days that had no new MPs added to the data file of NEAs at Today's Epoch.

Short nights would affect observatories experiencing short summer nights the same way - fewer NEOs detected.

Just a thought,