Richardton meteorite

The Richardton meteorite is a 90 kg H5 Ordinary chondrite that was seen to fall at 21:48 on 30 June 1918 between Mott, North Dakota and Richardton, North Dakota, United States.

Pieces were found in a strewn field of about 9 mi by 5 mi centred on 46.625°N, -102.27139°W and oriented north–south. pieces of this meteorite were for sale online at up to US$80/g.

In 1960 John Reynolds discovered that the Richardton meteorite had an excess of 129Xe, a result of the presence of 129I in the solar nebula.