The solar observations at Armagh Observatory in 1795-1797

Details The solar observations at Armagh Observatory in 1795-1797 The solar observations at Armagh Observatory in 1795-1797

Apr 2009

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2009an....330..311a&link_type=abstract

Astronomische Nachrichten, Vol.330, Issue 4, p.311

Astronomy and Astrophysics

Astronomy

5

Sun: Activity, Sunspots

Scientific paper

This article reports on solar observations by J.A. Hamilton and W. Gimingham at Armagh Observatory made in 1795-1797. A number of sunspot positions were obtained from the original observing notes, mostly from micrometer measurements. The period is particularly interesting for the understanding of the onset of the Dalton minimum and a possible minor cycle between the Cycles 4 and 5. For the same period, sunspot positions recorded by Staudacher were measured and published in an earlier paper.

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