Given a static ellipse on a 3D map, how would one calcualate a list of coordinates representing the rim of the ellipse?

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Thanks for taking the time to look into this, much appreciated!

The ellipse on the map is created by a longitude and latitude given in degrees.

Ex: (-103.0, 40.0)

Along with a minor/major axis represented in meters.

Ex: (semiMinorAxis : 400000.0, semiMajorAxis : 400000.0)

The map used, is a 3D Globe, provided by Cesium

With the information above, how would one calculate a list of coordinates which trace the rim of the ellipse?