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TeachMeFinance.com - explain Eccentricity Eccentricity The term 'Eccentricity' as it applies to the area of Earth observation can be defined as ' (aka ecce or E0 or e) One of six Keplerian elements, it describes the shape of an orbit. In the Keplerian orbit model, the satellite orbit is an ellipse, with eccentricity defining the 'shape' of the ellipse. When e=0, the ellipse is a circle. When e is very near 1, the ellipse is very long and skinny'. The term 'Eccentricity' as it applies to the area of the environment can be defined as 'The extent to which the Earth's orbit around the Sun departs from a perfect circle'. The term 'Eccentricity' as it applies to the area of the weather can be defined as ' A dimensionless quantity describing the elliptical shape of a planet's orbit'. Previous 5 Terms: eburnean EC ECAR ECARP ECC Next 5 Terms: ecclesiology eccrinology echidna echinuliform Echo 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.