[Man_of_Reason]

Green colour? Usually means copper or some similar mineral. Sounds like Soviet Space junk burning up.

[Seti 1]

Sounds like Soviet Space junk burning up.

Perhaps it was but the one I saw was a long time before space junk. It was green--bright green.

[lepton]

Sounds like Soviet Space junk burning up.

Possible, but only if the witnesses are really confused. re-entering space-junk moves very slowly compared to a meteor.