Why would it be green?
I doubt it was made of copper...
“Colors of meteors The color of many Leonids is caused by light emitted from metal atoms from the meteoroid (blue, green, and yellow) and light emitted by atoms and molecules of the air (red). The metal atoms emit light much like in our sodium discharge lamps: sodium (Na) atoms give an orange-yellow light, iron (Fe) atoms a yellow light, magnesium (Mg) a blue-green light, ionized calcium (Ca+) atoms may add a violet hue, while molecules of atmospheric nitrogen (N2) and oxygen atoms (O) give a red light. The meteor color depends on whether the metal atom emissions or the air plasma emissions dominate. “
http://leonid.arc.nasa.gov/meteor.html
Why not copper? Plenty of nickel/iron out there. Platinum and everything else too...
Yes... I still wonder what it would feel like to find an asteroid with a high concentration of Aurum (#79 on the periodic table).