The Sharpie of the Culebra Cut huge profits from entrance fees. This is one of Rosa's most historically accurate stories. The Sharpie of the Culebra Cut "The Sharpie of the Culebra Cut" is a 2001 Donald Duck comic story by Don Rosa. Rosa intended it as an "in-between" story to accompany his anthology "The Life and Times of Scrooge McDuck", happening chronologically between chapter 10: "The Invader of Fort Duckburg" and chapter 11: "The Empire-Builder from Calisota". The story is set in 1906. Scrooge McDuck, along with his sisters Hortense McDuck and Matilda McDuck are mining for gold in Panama, which has just recently separated from
1313 Berna rotational light-curve of "Berna". Light-curve analysis gave a rotation period of hours with a brightness variation of 0.28 magnitude (). In November 2007, photometric observations at Cerro Tololo, Chile, using its 0.9-meter Prompt5 telescope in combination with the Spitzer Space Telescope gave a concurring period of 25.46 hours with an amplitude of 0.5 magnitude (). Other light-curves were also obtained by several amateur astronomers giving a period of 6, 25.4 and 25.45 hours, respectively (). In February 2004, a satellite orbiting the asteroid was discovered. The moon, designated S/2004 (1313) 1, measures about 11 kilometers in diameter and orbits "Berna"