It has its own speed which is 60mps and relative to the Earth 100mps at its closest point.
If the Earth is traveling 18 MPS and the object is traveling 60 MPS then the maximum would be a direct in line hit from two directions . 60 + 18 = 78. There is an extra boost in speed from actually falling to the Earth but that can’t be any more than 7 MPS which is the escape velocity for the Earth.