Seymchan is a pallasite meteorite found in the dry bed of the river Hekandue, a left tributary of river Jasačnaja in the Magadan district, Russia, near the settlement of Seymchan, in June 1967.
Seymchan belongs to Main Group pallasites, but it is considered anomalous due to its high Fe (Iron) content. Before the discovery of its pallasitic structure it had been classified as IIE anomalous coarse octahedrite. Seymchan is considered a stable and rust-resistant pallasite. Due to the heterogeneous structure of Seymchan, there are two types of specimens: with or without olivine crystals. This is an example of a Seymchan with olivine crystals and is referred to as Seymchan Pallasite.
- 62.8 grams (2.2 ounces)
- 84.0 x 62.3 x 3.0 mm (3.3 x 2.4 x 0.11 inches)