http://arxiv.org/abs/1707.03393
There is a low frequency of sunspot observations in some years of the 17th and 18th century. In particular, the interval 1777-1795 is one of the periods with scarce observations in the databases. In this note, we report a sunspot observation carried out the 3rd November 1779 by Giuseppe Toaldo and Andrea Comparetti.
F. Dominguez-Castro and J. Vaquero
Thu, 13 Jul 17
35/60
Comments: 3 pages, The Observatory, accepted
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