Holy Mackeral! It's the Kecksburg Pine cone! (Obscure Ufo case from the...seventies, I think? Described a crashed, small, 'cone shaped' machine
that was whisked away in the middle of the night by the Army. One version of the story has it as a crashed Russian satellite, which did have a similar appearance, but the re-entry trajectory was wrong, according to James Oberg, whose opinion I tend to trust.)
Anyway, nifty little project - my hats off to you!