Figure 13. A region in Oz Terra, Charon’s rugged northern province, showing a pair of similarly sized craters. The black and white image from the long-range imager is overlaid in green with a map of the 2.2 µm absorption attributed to ammonia. One of the two craters shows a strong spectral signature at that wavelength.

Adapted from NASA/JHUAPL/SwRI. https://photojournal.jpl.nasa.gov/catalog/PIA20036.