Manu eyeballed the UFO when he was in town to play the Clippers on December 1 -- and he has since launched a serious investigation into the matter ... which involved a lot of Googling.
Manu posted his findings on his Facebook page yesterday, saying the best answer he could come up with was "a kind of spacecraft which is called X-37B and was supposed to land in the area between December 3 and 6. According to various media, it landed on Dec 3."
Manu points out that he spotted the craft on December 1 ... not December 3 ... so THE MYSTERY REMAINS.
So, we gotta ask ...