Does the Earth have another moon? I was just wondering what are the chances that there is a small object (say less than 1&nbsp;km but more than few meters) that orbits the Earth but has remained undetected by us? Are we actually scanning the space around the Earth continuously for orbiting bodies?
Not strictly satellites/moons, but certainly companions are 2010 TK7 with a diameter of ~300&nbsp;m, an Earth trojan at the L4 point, and the ~5&nbsp;km 3753 Cruithne in a peculiar orbit locked to the Earth's.