Could not angels move in the sky, go to the East, and stand over a house? Also, see the other evidence I present (reply 75)
Yes, this star could certainly have been an angel. It also could have been the Shekina [sic?] Glory of the Lord. It is also possible that it was a star in the normal sense that was supernaturally moved and placed. Whatever the nature of the star, it certainly was an unusual event created by God for specifically this event.
It definitely wasn't St. Elmo's fire, because he wasn't cannonized until years later. ;)
BTW, good use of commentaries!