T'Khasi at Surak's Passing was a map of the 40 Eridani star system created by the Vulcan artist T'Sari in the 4th century. The map was an artistic representation of the Nevasa system, as it was then named by its Vulcan inhabitants. It showed the primary star Nevasa A (40 Eridani A), its orbiting planets and moons Ket-Cheleb, T'Khasi (Vulcan), T'Khut and T'Rukhemai, and the other two orbiting stars Nevasa B (40 Eridani B) and Nevasa C (40 Eridani C). It was labelled in Ceremonial Golic Vulcan script.