Often the smaller asteroids are called meteoroids and the larger ones are called planetoids. Note: Even though a planetoid can approach the size of a moon, since it is in solar orbit, it cannot be classified as a moon.
What kind of spin are you putting on this? Isn't the Moon's orbit always concave to the Sun? Doesn't the Little Turtle orbit the Medium Turtle which in turn orbits the Great Turtle implying the Little Turtle at least epi-orbits the Great Turtle. (Or would the Law of Conservation make them spin backwards?)