"Have you checked this yourself or are you taking someone's word for it?"
"I know it should be an ellipse, because looking at a slanted surface essentially compresses the direction of the slant, either toward or away. A compressed circle is an ellipse. I've used that fact a bunch to draw error ellipses."
That's right. Did you notice that Polarik doesn't actually provide any measurements? He pretty consistently fails to do things like that. A real analysis would measure things and provide the measurements.
I've checked. It is an elipse.
did anyone notice that Bruce Springsteen did NOT sing “Born in the USA” at the Super Bowl?