A day when you learn something is a day not wasted. Isn't that what they say?
Tonight S told me Earth had a second moon - I was certain he was trying to fool me (for some unknown reason) so I did as he bade me and googled it.
Wikipedia states - indeed it's not a moon, but the asteroid was initially assumed to be one because of it's path around the sun.
Meet Cruithne - not Earth's second moon.
Wikipedia link: http://en.wikipedia.org/wiki/3753_Cruithne