Effective mean particle radius as a function of the size distribution index, from Equation (3). For comparison, we show size index measurements from in situ Bennu data (H20; C. W. Hergenrother et al. 2020), meteor showers (B11: R. C. Blaauw et al. 2011), sungrazing comets (K10: M. M. Knight et al. 2010), and a disintegrated comet (J23: D. Jewitt et al. 2023).