You're right it could have been space debris from a satellite or rocket. However most agree it's most likely a meteor fireball and not flaming space junk. A "meteor" doesn't have an orbit. A meteoroid (asteroid) does have an orbit while in space. A meteorite is the rock that survives impact with the Earth. And a meteor is the fiery phenomena while entering our atmosphere, better known as a shooting star. Meteors are usually seen in meteor showers such as the famous Leonids, and Perseids meteor showers. Meteors are small grain of sand sized particles, while fireballs are the result of a much larger mass entering our atmosphere. Small meteors are in fact captured on film all the time, however to actually capture a large bolide event such as this while zoomed in to focus on a galaxy, through a telescope with a field of view that is a small fraction of the visible night sky is a one-in-a-million shot. Fireballs are just large meteors. The value of meteorite fragments to science and collectors around the world is great, however it depends on the type of meteorite it is. Many museum, private collectors, and scientists can and do receive pieces of new meteorite falls all the time. Many meteorites fall every year, and pieces of these space rocks are studied, classified, and distributed throughout the worlds private collections and scientific institutions. Colleges and universities also may receive pieces for scientific study and course work in many related fields including mineralogy, chemistry, geology, and of course astronomy. The study of meteorites, their composition, and their origins is called meteoritics. The chances of actually capturing this meteor/fireball on film are truly astronomically small. Every pun intended.