Trajectory
Point
The shadow that is casted by one object in space on another is called an Eclipse.
An icy mass that orbits the sun is called a comet.
That description could fit any number of bodies in the solar system, but generally "asteroid" might be closest. Other more distant objects such as comets or Kuiper Belt Objects would tend to be more icy than rocky.
It is a meteoroid. To prove my answer, here is where I went:ask.com and I typed in what is a icy rock in outer space called?It gave me the answer meteoroid.
comet
It is called an eclipse.
Satellite.
The amount of space occupied by an object is called its VOLUME.
Asteroid Comets are icy conglomerations of material, so cannot be called a "rocky object".
Trajectory
The space taken up by an object is called volume.
This is called the volume of the object, the enclosed three-dimensional space.
satellite
an satellite
Spaceship