Visible magnitude at the time of observation as a function of absolute magnitude H_V for the UKIRT NEO survey. The top axis shows the estimated diameter derived from H_V assuming a 15% albedo using the relation of A. W. Harris & J. S. V. Lagerros (2002). Most objects were observed at V < H_V, highlighting the efficiency of the UKIRT NEO survey in targeting NEOs near peak in brightness. The bottom panel shows the cumulative H_V distributions for the UKIRT NEO survey (black line), MANOS (green line), and MITHNEOS (blue line). The dashed black line indicates the marginal H_V distribution of the UKIRT NEO survey.