Is it possible to retrieve the rotation component of a single video tracking marker?

I am tracking a set of objects through a video and this time I need to extract the rotation component of a marker, in addition to its location.

However, bpy.data seems to only be holding the normalised locations of the marker in co.

Is there some other way to obtain the rotation component of a single marker? I can probably create a proxy of rotation by tracking the relative positions of two markers but retrieving the rotation of a single marker would be really convenient now.