elliptical orbit around the Sun while the other planets orbit the Sun more or less within the same plane Pluto is out of kilter by a whopping 17 degrees because of these two unusual features of its orbit Pluto is the only planet that cuts across the orbit of another planet Neptune in size pluto is indeed in the satellite class its diameter 3600 miles is not much greater than that of Triton a satellite of Neptune or Titan one of the 10 satellites of Saturn because of its unusual characteristics it has been suggested that this misfit might have