Johannes Franz Hartmann
Johannes Franz Hartmann (11 January 1865 – 13 September 1936) was a German physicist and astronomer.
In 1904, while studying the spectroscopy of Delta Orionis he noticed that most of the spectrum had a shift, except the calcium lines, which he interpreted as indicating the presence of interstellar medium.
Johannes Franz Hartmann | |
|---|---|
 | |
| Born | 11 January 1865 |
| Died | 13 September 1936 (aged 71) |
| Nationality | German |
| Citizenship | German |
| Alma mater | University of Leipzig |
| Known for | Discovering interstellar medium |
| Scientific career | |
| Fields | Astronomy |
| Institutions | Astrophysical Observatory Potsdam |
| Doctoral advisor | Heinrich Bruns |
| 965 Angelica | 4 November 1921 | MPC |
| 1029 La Plata | 28 April 1924 | MPC |
| 1254 Erfordia | 10 May 1932 | MPC |
He was the director of the La Plata Astronomical Observatory, Argentina, from November 1922 to May 1934, and was also known under the name Juan Hartmann. He oriented the work of the observatory towards astrophysics and discovered the three asteroids of the main-belt, 965 Angelica, 1029 La Plata and 1254 Erfordia at La Plata between 1921 and 1932.
His doctorate was from the University of Leipzig in 1891 on lunar eclipses.
The lunar crater Hartmann on the far side of the Moon was named in his honor. Note, however, that the asteroid 3341 Hartmann was named after William K. Hartmann and is unrelated to him.
See also
- Hartman mask, a tool to help focusing telescope
References
External links
- (in Spanish) Lista de cientificos Archived 2016-10-14 at the Wayback Machine
- Hartmann, Johannes Franz Archived 2016-03-03 at the Wayback Machine
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