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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    Title :

    A small collection of sunspot drawings made in the Royal Astronomical Observatory of the Spanish Navy in 1884


    Contributors:

    Published in:

    Advances in Space Research ; 58 , 11 ; 2247-2254


    Publication date :

    2016-08-11


    Size :

    8 pages




    Type of media :

    Article (Journal)


    Type of material :

    Electronic Resource


    Language :

    English