Arnold Schwassmann

Friedrich Karl Arnold Schwassmann (born March 25, 1870 in Hamburg ; † January 19, 1964 there ) was a German astronomer .

Life

Arnold Schwassmann was the son of a merchant and visited the Johanneum in Hamburg with the High School in 1888. He received his doctorate after studying mathematics, physics and astronomy in Leipzig , Berlin and Goettingen 1893 in Göttingen with a thesis on the Mercury transit of 1891. After he was at the astrophysical observatory in Potsdam and assistant at the observatory in Göttingen until 1895 . In 1897, at the invitation of Max Wolf, he went to the new Heidelberg observatory on the Königstuhl . In 1901/2 he was a research assistant at the chronometer testing institute of the Seewarte Hamburg and from 1902 at the invitation of Richard Reinhard Emil Schorr an observatory at the Hamburg observatory , in whose new building in Bergedorf he was involved. During World War I he worked on the tide calculators in Potsdam and Wilhelmshaven. He stayed at the Bergedorf observatory until his retirement in 1934. He also taught astrophysics at the Hamburg University, which was newly founded after the First World War.

His main work was the spectral survey of the 115 Kapteyn calibration fields of the northern celestial sphere, carried out from 1925 to 1934 and published from 1935 to 1953.

Discoveries

Together with Max Wolf, he discovered 22 asteroids and, together with his colleague Arthur Arno Wachmann, the periodic comets 29P / Schwassmann-Wachmann , 31P / Schwassmann-Wachmann and 73P / Schwassmann-Wachmann .

The asteroid (989) Schwassmannia is named after him, its discoverer.

asteroid	Date of discovery	Co-discoverer
(435) Ella	September 11, 1898	with Max Wolf
(436) Patricia	September 13, 1898	with Max Wolf
(442) Eichsfeldia	February 15, 1899	with Max Wolf
(443) Photographica	February 17, 1899	with Max Wolf
(446) Aeternitas	October 27, 1899	with Max Wolf
(447) Valentine	October 27, 1899	with Max Wolf
(448) Natalie	October 27, 1899	with Max Wolf
(449) Hamburga	October 31, 1899	with Max Wolf
(450) Brigitta	October 10, 1899	with Max Wolf
(454) Mathesis	March 28, 1900
(455) Bruchsalia	May 22, 1900	with Max Wolf
(456) Abnoba	June 4th 1900	with Max Wolf
(457) Alleghenia	September 15, 1900	with Max Wolf
(458) Hercynia	September 21, 1900	with Max Wolf
(905) Universitas	October 30, 1918
(906) Repsolda	October 30, 1918
(912) Maritima	April 27, 1919
(947) Monterosa	February 27, 1921
(989) Schwassmannia	November 18, 1922
(1192) prism	March 17, 1931
(1303) Luthera	March 16, 1928
(1310) Villigera	February 28, 1932

Web links

• Publications by A. Schwassmann in the Astrophysics Data System
• A. A. Security guard: Arnold Schwassmann. Communications of the Astronomical Society, Vol. 17 (1964), p. 42. (Obituary)