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TeachMeFinance.com - explain perigee (aka periapsis or perifocus) perigee (aka periapsis or perifocus) The term 'perigee (aka periapsis or perifocus)' as it applies to the area of Earth observation can be defined as ' On an elliptical orbit path, the point where a satellite is closest to the Earth'. Previous 5 Terms: Performance-based regulatory action perigean range perigean tidal currents perigean tides Perigee Next 5 Terms: perihelion perimeter period period period decay (aka decay) About the author Mark McCracken Author: Mark McCracken is a corporate trainer and author living in Higashi Osaka, Japan. He is the author of thousands of online articles as well as the Business English textbook, "25 Business Skills in English". Copyright © 2005-2011 by Mark McCracken, All Rights Reserved. TeachMeFinance.com is an informational website, and should not be used as a substitute for professional medical, legal or financial advice. Information presented at TeachMeFinance.com is provided on an "AS-IS" basis. Please read the disclaimer for details.