Sharpless coordinates are based on the star catalogs Bonner Durchmusterung ( BD ) and Cordoba Durchmusterung ( CD ), but the second release was adjusted to the 1900 epoch.
12.
The results of this collaboration was the publication of " Cape Photographic Durchmusterung ", a catalog listing positions and magnitudes for 454, 875 stars in the Southern Hemisphere.
13.
The " Bonner Durchmusterung " itself was published by Friedrich Wilhelm Argelander, Eduard Sch�nfeld between 1852 and 1859 . It covered 320, 000 stars in epoch 1855.0.
14.
Under the first director, Ormond Stone, a program to measure the positions of southern stars was carried out ( an extension on the Durchmusterung star catalogue to-23 degrees ).
15.
It is named after Friedrich Wilhelm Argelander ( 1799 1875 ), author of the famous " Bonner Durchmusterung " and 19th-century head of the ancient observatory at Turku.
16.
Subsequently, the two stars received separate designations in the Cape Photographic Durchmusterung, which was processed between 1859 and 1903, then in the Henry Draper Catalogue, published between 1918 and 1924.
17.
However his main interest was in the stellar statistics of the Bonner Durchmusterung and Bonn section of the Astronomische Gesellschaft star catalogues, and in the conclusions these led about the structure of the universe.
18.
In about 1901, the International Astrographic Congress asked the observatory to collaborate in the international star cataloguing and charting project, the'International Photo-Durchmusterung'or'Cape Photographic Durchmusterung'( CPD ).
19.
In about 1901, the International Astrographic Congress asked the observatory to collaborate in the international star cataloguing and charting project, the'International Photo-Durchmusterung'or'Cape Photographic Durchmusterung'( CPD ).
20.
While at the Cape, he discovered what is now known as Kapteyn's Star which the latter had listed as one of a number included in the Cordoba Durchmusterung but missing from the later Cape Photographic Durchmusterung.
