(Københavns, 1856). 4to. No wrappers. Issued in: "Videnskabernes Selskabs Skrifter". Titelepage a. pp. 1-39. Uncut. 2 stamps on titlepage.
The editor, Schjellerup calculates the orbit of the comet of 1580 with base in the unpublished observations of Brahe, publishing his oservations here for the first time. - Brahe observes a comet and follows it until november 25 and in the morning of december 13, 1580.