Largest Moon With A Concave Orbit

[1977ub]

TL;DR

Asimov pointed out that Earth's Moon is nowhere concave (looped) in its motion with regard to the Sun.

Asimov pointed out that Earth's Moon is nowhere concave (looped) in its motion with regard to the Sun.
What about Pluto and Charon - are both concave w.r.t. the Sun at certain times? Moreover, what is the largest body in the solar system which is sometimes concave w.r.t. The Sun? Thank you.

https://en.wikipedia.org/wiki/Orbit_of_the_Moon#Path_of_Earth_and_Moon_around_Sun

 

[Janus]

The largest moon in the Solar system is Ganymede, and it has a "looped" heliocentric path.
Charon also has such a path.

 

[1977ub]

Thank you - I was also wondering of Pluto itself has such a path.