Detecting Lagrange Moons

[stevebowers]

Cruithne is the closest thing we have to a Lagrangian asteroid - it is 5km long, and was discovered in 1986. So, no. An Earth/Sun Trojan would probably be missed in the 1960s, but we would probably have seen it by now.

Excellent fit on size and a good example.

But Cruithne never gets closer than 12 million kilometers from Earth. The proposed stealthy asteroid is about 400,000km from Earth.

Are you talking about the Earth/Moon L5 point, or the Earth/Sun L5 point? Ann asteroid in the Earth/Moon L5 point would have an average distance of 384,400 km, although it would probably oscillate significantly around that distance.