Wilhelm Dollen
Johann Heinrich Wilhelm Döllen , mostly just Wilhelm Döllen ( Russian Вильгельм Карлович Дёллен / Wilgelm Karlowitsch Djollen ; * April 13th July / April 25th 1820 greg. In Mitau ; † February 4th jul. / February 16, 1897 greg. In Jurjew ) was a German astronomer at the Pulkovo observatory near Saint Petersburg.
In 1872 he was elected to the American Academy of Arts and Sciences .
The Döllen method he developed for astronomical length and time determination , in which star passages are observed in the vertical direction of the North Star , is known to this day. Because this only moves very slowly in the sky, the Döllen method can also be used if the time or geographical longitude is only known very imprecisely.
Fonts (selection)
- About the total solar eclipse on July 16, 1851 . In: Papers of the Pulkowo Observatory , 1852.
- The time is determined by means of the portable passage instrument in the vertical of the Pole Star. First treatise . Book printing of the Imperial Academy of Sciences, St. Petersburg 1863.
- The time is determined by means of the portable passage instrument in the vertical of the Pole Star. Second treatise . Book printing of the Imperial Academy of Sciences, St. Petersburg 1874.
Web links
- Baltic Historical Commission (Ed.): Entry on Wilhelm Döllen. In: BBLD - Baltic Biographical Lexicon digital
- Short biography on rulex.ru (Russian)
- Publications by W. Döllen in the Astrophysics Data System
- H. Struve: Notice of death. Astronomische Nachrichten, Vol. 142 (1897), p. 407. (Obituary)
- NN: Obituary Notices: Döllen, Wilhelm. Monthly Notices of the Royal Astronomical Society, Vol. 58 (1898), p. 152 (obituary, English)
| personal data | |
|---|---|
| SURNAME | Döllen, Wilhelm |
| ALTERNATIVE NAMES | Döllen, Johann Heinrich Wilhelm; Дёллен, Вильгельм Карлович (Russian spelling) |
| BRIEF DESCRIPTION | German astronomer |
| DATE OF BIRTH | April 25, 1820 |
| PLACE OF BIRTH | Mitau |
| DATE OF DEATH | February 16, 1897 |
| Place of death | Yuryev |