Establishing major axis of an ellipse type closed curve...how?

Hi John,
trouble is its a trace of a photogrammetry shape so has no actual Quads as yes Quads are the way.

Imagine someone takes an elipse, distorts it a tad, then simply retraces it with a curve tool with only Near Osnap on.

I see I have had no reply to a post entitled elipse through points…no command ?

that would do nicely here. I wonder that if there is circle through points, then why not elipse through points.

Steve