Article ID Journal Published Year Pages File Type
5486801 Advances in Space Research 2016 8 Pages PDF
Abstract
In this paper we analyze a small collection of sunspot drawings made at the Astronomical Observatory of the Spanish Navy in the period from April 1, 1884 to August 18, 1884. We calculate the area and the heliographic coordinates of the observed sunspots. From these coordinates, we obtain the solar rotation rate in this period. Finally, we compare our results with the data recorded by the Royal Greenwich Observatory.
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Physical Sciences and Engineering Earth and Planetary Sciences Space and Planetary Science
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A small collection of sunspot drawings made in the Royal Astronomical Observatory of the Spanish Navy in 1884
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