Grand average spectra of the leading hemisphere (LH, light blue), trailing hemisphere (TH, orange), and all spectra (black) for each moon. For Ariel and Umbriel, the LH, TH, and “all” grand averages are normalized to the E. Karkoschka (2001) geometric albedos in the F631N filter (0.63 μm). The LH, TH, and “all” spectra for Titania and Oberon are normalized to the LH, TH, and “all” average TMO R-band geometric albedos (blue, red, and green hexagons with error bars). Titania and Oberon are vertically offset by the listed amount for clarity; no offset was applied to Ariel or Umbriel. The gray points with error bars labeled as K2001 are the geometric albedo spectra for each body from E. Karkoschka (2001).