Interesting comment below the linked article: > Lots of asymmetries involved. The star is off-center toward the lower right, same direction as the partial arc.

Interesting comment below the linked article: > Lots of asymmetries involved. The star is off-center toward the lower right, same direction as the partial arc. The major ring could be elliptical, rather than circular. It also varies in brightness around the circumference. I'm a complete layman, but could this explain the high deviation from circular orbits of our own outer planets? IIRC this was something of an unexplained issue?