Could orbiting asteroids of Earth harbour Alien probes?

(Image: "The Sentinel" Arthur C. Clarke 1983.  Art: Lebbeus Woods)

The Earth is known to have co-orbiting asteroids, a recent discovery in astronomy made in the late 1990s found numerous objects that encircle around the Earth, that have been studied and measured by its co-orbital ratio of 1:1.  To which they have been classified as Near Earth Objects that stay within the outer resonance of the Earth and Sun's orbiting pattern.  Also seen with the NEO's are eccentricity quasi-satellites, which shift between unstable and stable orbiting degrees around the Earth.  A new peer-reviewed paper by researcher James Benford, believes that these quasi-satellites or “lurkers” as he has described, may be host to robotic alien probes, sent millions of years ago as listening outposts from an advanced civilization.  Have now embedded themselves onto these asteroids, mining and utilizing the raw materials within, whilst maintaining their operative; to study us. 

From: Earth Sky.

"...These co-orbitals have been little studied by astronomers so far, and not at all yet by SETI or planetary radar observations. Benford calls hypothetical, hidden, unknown and unseen alien probes by the name lurkers. In theory, they would be robotic, like our own robot probes sent out to explore our solar system, but doubtless much more advanced. It’s possible that a lurker could be in our solar system, hiding on one of Earth’s co-orbital asteroids, for thousands or millions of years, just silently watching. Benford suggests that searching for lurkers would be an interesting new type of SETI, which traditionally has focused on looking for artificial radio or light signals from distant stars. But if there were alien probes literally in our own backyard, we could actually go and observe them. Scientists could first look for them in the electromagnetic spectrum of microwaves and light or by using planetary radar..."