Yes there are millions of objects that orbit Saturn.
The planet Saturn
Yes, when Cassini entered orbit around Saturn it did cause the planet's orbit to change.
No planet orbits around Saturn because planets only orbit around a star like our Sun. And Saturn isn't a star, it's a planet.
The rings that it has and the moons that orbit around it.
Saturns ring are rocks and meteors spinning around Saturn
Many different objects in space revolve around many other things. Usually, it is acceptable to use the term 'satellite' when describing a moon's orbit around a planet, or even a planet's orbit around a star.
How many days does it take Saturn the planet to orbit the sun? How many days does it take Saturn the planet to orbit the sun?
The gravitational pull of the planet Saturn keep it's rings in orbit.
Saturn.
Ceres is not considered a planet, since it does not dominate its orbit. There are other sizable objects at that distance from the sun, in orbit around the sun. It is a dwarf planet though.
Saturn. It takes around 29.5 years to orbit our sun.
Uranus is the planet that was discovered beyond the orbit of Saturn. It was discovered on March 13, 1781 by William Herschel.