Comet over Los Angeles? 3:57AM March 23rd 2006

At about 3:57AM I saw what I can only imagine was a comet of some sort
over LA. From where I was standing it was heading East-northeast. I
have seen comets before, but they looked like faint blips compared to
this. The sighting was so very dramatic compared to what I have seen
previously, it looked like a big ball of color, I could hardly believe
my eyes.

What sort of authorities on sky sightings do I contact to corroborate
this? It seems so surreal that I am having a hard time believing that
it happened.