The orbit of a meteor depends on the size of the meteor. Different meteors have different orbits and it is hard to calculate its size.
A meteor or comet
Meteor.
An object only becomes a meteor when it leaves orbit and enters earth's atmosphere.
Earth's orbit crossing the orbit of a defunct comet.
Both orbit an object with higher mass.
Meteor shower
An asteroid is a small rocky body that orbits the sun; if it leaves its orbit, it can potentially enter the Earth's atmosphere, becoming a meteor and potentially hitting the Earth's surface as a meteorite.
The Daily Orbit - 2012 Perseid Meteor Shower 1-234 was released on: USA: 7 August 2013
The Daily Orbit - 2012 Meteor Crater Found in Iowa 1-221 was released on: USA: 12 July 2013
Unknown at the present time - but you can assume something in near Earth orbit.
Gravity. And the meteor is on a path that intersects the orbit of the Earth.
Planet, planetoid, moon, asteroid, meteor, comet