Nils Christoffer Dunér

Nils Christofer Dunér Nils Kristofer Dunér ( born May 21, 1839 in Billeberga, community Svalöv, † November 10, 1914 in Stockholm) was a Swedish astronomer.

Dunér in 1862 received his doctorate at the University of Lund and was from 1864 Observer at the Observatory of Lund. In 1887 he was appointed extraordinary professor of astronomy, in 1888 he held the same office at the University of Uppsala.

1863 Dunér belonged to the founders of the Astronomical Society. 1861 and 1864 he took part in two Arctic expeditions to Spitsbergen.

From the 1870s he began to work in the field of spectroscopy. Previously, he worked on classical astronomy, celestial mechanics and double stars. From 1867 to 1875 he led from micrometric measurements of 445 double and multiple stars to calculate the movements of their components. In 1884 he published a catalog of stellar spectra ( class III in bird classification system ).

Dunér was a member of the Royal Swedish Academy of Science, the Royal Physio Graphic Society in Lund and the Royal Society of Sciences in Uppsala.

He was awarded the Prix Lalande 1887 of the Institut de France in 1892 by the Royal Society "for his spectroscopic researches on stars " with the Rumford Medal. The crater Dunér on the Moon is named after him.

Dunér was a Freemason and a member of the Swedish Equestrian Order of Charles XIII.

Works

• Micrométiques Mesures d' étoiles doubles, 1876.
• Sur les étoiles à la troisième classe de specters, 1884.
• Recherches sur la rotationally du Soleil, 1891.
• Handbok i allmän astronomical, 1899.
• Calcul des éléments de l' elliptiques orbite du système de l' étoile stellaire variable Y Cygni, 1900.
• About the rotation of the Sun, in 1907.