Sarah Valencia Kristen A. Bennett Margaret E. Landis Kerri L. Donaldson Hanna Addison T. Dove Patrick O'Brien Brett W. Denevi Justin Hagerty Craig Hardgrove Paul O. Hayne Adam LaMee Thomas H. Prettyman Katherine A. Shirley Matthew A. Siegler Jessica M. Sunshine Jean-Pierre Williams 2026 <p><span>Characterizing terrain surface properties is an essential step in assessing the feasibility of landing successfully at a location on a planetary surface. Slopes and terrain ruggedness index (TRI) values derived from high-resolution (2 m pixel</span>⁻¹<span>) digital terrain models provided important constraints in selecting the landing site for the upcoming Payloads and Research Investigations on the Surface of the Moon program as part of the Commercial Lunar Payload Services task order CP-21 mission. The selected landing site needed to balance safety requirements with the ability to achieve the science and exploration goals of the Lunar Vulkan Imaging and Spectroscopy Explorer payload. In this study, we compare several morphometric parameters in the context of the CP-21 landing site on Mons Gruithuisen Gamma, or the Gamma dome, and quantify the information they convey about lunar surface properties to assess their utility for future landing site evaluation. TRI was found to be a useful metric for assessing landing site safety. Metrics that better decouple slope and surface roughness, the vector ruggedness measure and the standard deviation of slope, provided additional information about surface characteristics and textures such as the degree to which roughness is isotropic.</span></p> application/pdf 10.3847/PSJ/ae523b en American Astronomical Society Morphometric properties of the CP-21 landing site on the Moon at Mons Gruithuisen Gamma article