Bright round, orange glowing, then changed to a bright green, glowing cigar shape, streaked through sky in a straight line.
I glanced out the window and at first it appeared to be a bright round fireball, orange with yellow inside, and an orange dot in the center, then immediately it became a kind of cigar shape; bright emerald, (almost fluorescent green) that glowed outward from each side of it. There was no visible trail.
My first inclination was that it was a falling star; it was travelling in a straight line, and I tried to point it out to my son beside me, but found myself sputtering and unable to say anything till it was gone; about 5 seconds.
It appeared to be within our atmosphere, but way up; perhaps 5000 feet, (guessing from how high passenger jets usually fly) and would have been able to fit a couple of those passenger jets inside of it.
It was headfing southbound, toward the ocean from where I was standing, then it dissapeared as suddenly as it had appeared.
This was in the northern outskirts of the city of Accra, Ghana, on the west coast of Africa.