5 citations
Showing astro-ph.SRShow all
3 papers · 1 filter
astro-ph.SR2025
Bošković's Spherical Trigonometric Solution for Determining the Axis and Rate of Solar Rotation by Observing Sunspots in 1777
Mirko Husak, Roman Brajša, Dragan Špoljarić +5
In September 1777 Ruđer Bošković observed and measured the sun-spot positions to determine the solar rotation elements. In 1785, among other methods, he described a trigonometric s…
astro-ph.SR2025★ 5 cited
Bošković's method for determining the axis and rate of solar rotation by observing sunspots in 1777
Mirko Husak, Roman Brajša, Dragan Špoljarić +5
In 1777 Ruđer Bošković observed sunspots, determined their positions and the solar rotation elements by his own methods briefly described here. We repeat his calculations of the me…
astro-ph.SR2022★ 3 cited
On the Determination of the Solar Rotation Elements i, Ω and Period using Sunspot Observations by Ruđer Bošković in 1777
Mirko Husak, Roman Brajša, Dragan Špoljarić
In September 1777, Ruđer Bošković observed sunspots for six days. Based on these measurements, he used his own methods to calculate the elements of the solar rotation, the longitud…