Johannes Franz Hartmann
Johannes Franz Hartmann (January 11, 1865 – September 13, 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 Hartman
|Died||September 13, 1936 (aged 71)|
|Alma mater||University of Leipzig|
|Known for||Discovering interstellar medium|
|Institutions||Astrophysical Observatory Potsdam|
|Doctoral advisor||Heinrich Bruns|
|965 Angelica||November 4, 1921||MPC|
|1029 La Plata||April 28, 1924||MPC|
|1254 Erfordia||May 10, 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.
- Hartman mask, a tool to help focusing telescope
- "Minor Planet Discoverers (by number)". Minor Planet Center. 23 May 2016. Retrieved 3 June 2016.
- Asimov, Asimov's Biographical Encyclopedia of Science and Technology 2nd Revised edition
- Hartmann, J. (1904). "Investigations on the spectrum and orbit of delta Orionis". Astrophysical Journal. 19: 268–286. Bibcode:1904ApJ....19..268H. doi:10.1086/141112.
- Hockey, Thomas (2009). The Biographical Encyclopedia of Astronomers. Springer Publishing. ISBN 978-0-387-31022-0. Retrieved 22 August 2012.
- Schmadel, Lutz D. (2007). "(3341) Hartmann". Dictionary of Minor Planet Names – (3341) Hartmann. Springer Berlin Heidelberg. p. 278. doi:10.1007/978-3-540-29925-7_3342. ISBN 978-3-540-00238-3.
|This article about a German astronomer is a stub. You can help Wikipedia by expanding it.|