National Aeronautics and Space Administration (NASA). This Technical Handbook approved by NASA 30.07, 2008 . Expiration Date: 30-07-2013. 174 p. This NASA-HDBK serves as a companion to NASA Procedural Requirements (NPR) 8715.6, NASA Procedural Requirements for Limiting Orbital Debris and NASA-STD 8719.14, Process for Limiting Orbital Debris and contains the background and reference materials to aid in understanding the foundation and science for predicting and limiting orbital debris.