Osseo is an iron meteorite[1] found in 1931 by Mr. Frank Johnston about 5 kilometres (3.1 mi) from Osseo, Ontario. It was about 30 centimetres (12 in) long. No fireball was observed and there was no evidence that it was a recent fall.
It is a coarse octahedrite, IAB complex.
The main mass is in the Smithsonian Institution, Washington.
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