The radial distribution of the Kuiper Belt

We examine the radial distribution of the Kuiper Belt objects (KBOs) using a method that is insensitive to observational bias effects. This technique allows the use of the discovery distances of all KBOs, independent of orbit al classification or discovery circumstance. We verify the presence of an o uter edge to the Kuiper Belt, as reported in other works, and we measure th is edge to be at R = 47 +/- 1 AU given any physically plausible model of th e size distribution. We confirm that this outer edge is due to the classica l KBOs, the most numerically dominant observationally. In addition, we find that current surveys do not preclude the presence of a second, unobserved Kuiper Belt beyond R = 76 AU.