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You have the impedance looking into the feedline from the transmitter end, but now you are asking what the antenna is doing.
An arbitrary amount of feedline will rotate a point on the smith chart trace around the center by an arbitrary angle, easily turning most anything into a reactance of zero.
And that one point is only for one frequency, at other frequencies it gets rotated by a different amount, because the feedline is a different number of wavelengths long.
Somebody might be able to figure out what's going on, given an exact measurement of the length of your feedline and the velocity factor of the feedline.
Not me, at least not with an awful lot of head scratching.

A couple weeks ago we had a discussion about doing an O-S-L calibration through the feedline to calibrate that out.
This looks like an excellent example of why one would want to do that.
The smith chart will look far different when you do, and tell you much more about exactly what is going on at the antenna.

Jerry, KE7ER.