Chapter 9: Overheads and Orbit-Time Determination 9.1 Overview 9.2 STIS Exposure Overheads 9.3 Orbit Use Determination Examples 9.3.1 Sample Orbit Calculation 1: Long-Slit Spectroscopy of the Galaxy M86 9.3.2 Sample Orbit Calculation 2: Low Dispersion Spectroscopy of Solar Analog Star P041-C 9.3.3 Sample Orbit Calculation 3: Imaging and Spectroscopy of the Cat’s Eye Planetary Nebula, NGC 6543 9.3.4 Sample Orbit Calculation 4: MAMA Echelle Spectroscopic Exposures in the CVZ 9.3.5 Sample Orbit Calculation 5: Faint CCD Imaging