THE KNOWLEDGE O THE DOGON
On left: the orbit of Digitaria (Sirius B) around Sirius as portrayed by the Dogon in their sand drawings. On right: A modern astronomical diagram of the orbit of Sirius, the years indicated being the positions of Sirius B in its orbit on those dates. Note that the Dogon do not place Sirius at the centre of their drawing but seem to place it near one focus of their approximate ellipse which constitutes one of the most extraordinary features of their information, and matches the diagram on the right to an uncanny degree.
From The Sirius Mystery by Robert Temple