At the object’s current velocity of 130,000 mph it takes 17,600 years to go one light year. The closest star to Earth (other than our sun) is Proxima Centauri, which is 4.24 light years from Earth and nowhere close to the direction that the object is coming from. The closest solar system on the object’s trajectory is probably several hundred thousand years away at its current velocity. So if it is the vanguard of an alien invasion fleet they sure are taking there time getting here.
Fuel is expensive all over................
you are assuming that it did not slow down before it got into our detector range