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Argelander, Friedrich Wilhelm August

Born Memel, Prussia (Klaipeda, Lithuania), 23 March 1799

Died Bonn, Germany, 17 February 1875

Friedrich Argelander was an observatory director who confirmed solar motion from stellar proper motions; he later produced the Bonner Durchmusterung. Argelander was the son of merchant and shipowner Johann Gottfried Argelander (whose father was Finnish) and Wilhelmina Dorotea Grünhagen. In 1823, Argelander married Maria Sophia Charlotte Courtan, and they had one daughter: Maria Wilhelmina Amalia.

Argelander studied astronomy in the University of Königsberg under Friedrich Bessel, completing his dissertation in 1822. Next year, he was appointed observator (associate professor) in Finland, at the University of Turku (åbo in Swedish). The observatory in Turku had been founded in 1819, but its first observator, Henrik Johan Walbeck, died unexpectedly. During his time at Turku, Argelander