Stellarium – egy csillagászati kódex Mátyás könyvtárában
The Stellarium - an astronomical codex in the Library of King Matthias of Hungary

Summary/Abstract: The Stellarium is a little known piece of the Corvinian Library of King Matthias of Hungary. The author of this work, Johannes Tolhopff (1429–1503), a professor at Leipzig and Ingolstadt, came to Hungary at the invitation of the King around 1480 and dedicated his work to Matthias. It can be found now in the Herzog August Library in Wolfenbüttel (Cod. Guelf. 84.1 Aug 40). The codex (an unedited manuscriptum unicum), produced in Buda, is a user’s manual of an instrument called the stellarium, a kind of equatorium, used for determining the position of the planets. Tolhopff gave several tables of mean motions for use with the stellarium. As comparison with Cod. Lat. 62. of the National Széchényi Library clearly proves, these tables follow the Parisian Alfonsine tables. The codex, however, is not suitable for determining planetary positions without the instrument.

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