Bonner Durchmusterung
See also: DM
The Bonner Durchmusterung (DM) is oldest Catalog of stars still used by the astronomers.
Lui and its successors were the pre-photographic catalogs most complete.
The catalog itself was published by Friedrich Wilhelm Argelander, Adalbert Krüger, and Eduard Schönfeld between 1852 and 1859. Its successors will be published until in 1903. It counted 324 188 stars between the north pole and the variation -2 and until the magnitude 9,5; the positions are given there for the time 1855.0.
As it covered only the septentrional celestial hemisphere and part of southern (being compiled from the observatory of Bonn), it was increased by the Südliche Durchmusterung (SD), which covered the variations from -1 to -23 degrees (1886, 133 659 stars). It was then supplemented by the Córdoba Durchmusterung (580 000 stars), which was initially compiled with Córdoba in Argentina in 1892 on the initiative of John Mr. Thome. This one covers the variations from -22 to -90. Lastly, the Cape Photographic Durchmusterung (1896, 450.000 stars), compiled with the Cape in South Africa, covers the variations from -18 to -90.
The goal of these Durchmusterungen or catalogs generals was to give to list the greatest number of stars and, in addition to the position, they gave also an estimate of the visual photometric data .
The astronomers prefer designations HD, because this catalog gives the spectral Type, but as Durchmusterungen are more complete, one uses sometimes their designations when To drape it been lacking. Unfortunately, of many catalogs the references give to Durchmusterungen without specifying which is used each time, which causes confusion in the zones of stepping.
The star names of these catalogs include initial catalog (although the Sudentliche follows the example of the Bonner and uses data base; CPD is frequently shortened with CP), followed angle of variation of star (truncated, thus going from +00 to +89 and -00 to -89), followed by a number. For example, BD+50°1725 or CD-45°13677.
| Random links: | Citroen CX | Edith Smeesters | Saint-Germain-of-meadows Coffee II | Đetinja | Daniel Ciobotea | Hampstead |