I noticed how large and blue the fire ball was the most. Also, that is was moving slower than any meteorites I had observed before. It was one BIG blue fireball with a lighter train moving slowly until it disappears from sight down below in the Anza Borrego Desert below me which is below sea level. I am at 3646 elevation. It made me think of space junk because it was moving so slow and I had never seen a blue glow before just a bright white before.