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Friedrich Tietjen
German astronomer From Wikipedia, the free encyclopedia
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Friedrich Tietjen (1832 in Westerstede, Oldenburg – 1895 in Berlin) was a German astronomer.[2]
| 86 Semele | 4 January 1866 | MPC |
He was director of the Astronomisches Rechen-Institut (ARI) from 1874 until his death in 1895. The Minor Planet Center credits him with the discovery of one minor planet, the 120-kilometer sized asteroid 86 Semele.[1]
The main-belt asteroid 2158 Tietjen, discovered by Karl Reinmuth at Heidelberg Observatory in 1933, was named in his memory.[2]
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