Heinrich Friedrich Siedentopf (1 December 1906 – 28 November 1963) was a German astronomer and physicist.

He was born in Hannover. In 1930, he became an assistant to Heinrich Vogt, then joined the national observatory in Heidelberg. Between 1940–46 he was a professor of astronomy at the University of Jena, and director of the observatory. In 1949, he was a professor at the University of Tübingen,[1] where he later died of a heart attack.

Professor Siedentopf published a total of 146 papers and a textbook. He studied cosmology, stellar convection,[2] photometry and the zodiacal light.[3] In 1934, he developed an adjustable iris for the Stetson-Schilt photometer, allowing the observer to adjust the light level directed at the astronomical plate.[4][5]

Gravesite of Siedentopf at the Bergfriedhof in Tübingen

Siedentopf crater on the Moon[6] and the main belt asteroid 5375 Siedentopf were named after him.

References

  1. ↑ Barnstedt, Jürgen (September 29, 2005). "History and Chronicle of Astronomy in Tübingen". Institut für Astronomie und Astrophysik. Retrieved April 11, 2009.
  2. ↑ Zirker, Jack B. (2002). Journey from the Center of the Sun. Princeton University Press. p. 62. ISBN 0-691-05781-8.
  3. ↑ "Obituary: Heinrich Siedentopf". Irish Astronomical Journal. 9: 165. 1969. Bibcode:1969IrAJ....9..165.
  4. ↑ "History of Photometry in Astronomical Observations". McCormick Museum. December 28, 2005. Retrieved April 11, 2009.
  5. ↑ Hearnshaw, J. B. (1996). The measurement of starlight: two centuries of astronomical photometry. Cambridge University Press. p. 292. ISBN 0-521-40393-6.
  6. ↑ Blue, Jennifer (July 25, 2007). "Gazetteer of Planetary Nomenclature". USGS. Retrieved August 5, 2007.


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