Hartmut Jahreiß (born 1942) is a German astronomer associated with

Astronomisches Rechen-Institut The Astronomical Calculation Institute (german: Astronomisches Rechen-Institut; ARI) is a research institute in Heidelberg, Germany, dating from the 1700s. Beginning in 2005, the ARI became part of the Center for Astronomy at Heidelberg Univers ...

specializing in the study of nearby stars.

Work

Hartmut Jahreiß obtained his Ph.D from the

University of Heidelberg } Heidelberg University, officially the Ruprecht Karl University of Heidelberg, (german: Ruprecht-Karls-Universität Heidelberg; la, Universitas Ruperto Carola Heidelbergensis) is a public research university in Heidelberg, Baden-Württemberg, ...

. His thesis was on the spatial distribution, kinetics and age of stars near the Sun. Jahreiß soon began work at

with

Wilhelm Gliese Wilhelm Gliese (, English ; 21 June 1915 – 12 June 1993) was a German astronomer who specialized in the study and cataloging of nearby stars. Life Gliese was born in Goldberg, now in Polish Silesia, the son of judge Wilhelm Gliese. He wor ...

, a world-renowned authority on nearby stars. Jahreiß is best known for his collaboration with Gliese on the publication of new editions of the ''

Gliese Catalogue of Nearby Stars The ''Gliese Catalogue of Nearby Stars'' (, English ) is a star catalogue listing stars located within 25 parsecs (81.54 lightyear, ly) of the Sun. First edition and supplements In 1957 Germans, German astronomer Wilhelm Gliese published his fir ...

'' in 1979 and 1991. Upon the death of Gliese in 1993, Jahreiß wrote Gliese's obituary. The Gliese catalog stars are now known by the abbreviation ''GJ'' (Gliese–Jahreiß) in recognition of Jahreiß's contribution. Jahreiß contributed to the

Hipparcos ''Hipparcos'' was a scientific satellite of the European Space Agency (ESA), launched in 1989 and operated until 1993. It was the first space experiment devoted to precision astrometry, the accurate measurement of the positions of celestial obj ...

catalogs of nearby stars. In 1997, as a member of the Research Consortium on Nearby Stars (RECONS), he identified

GJ 1061 Gliese 1061 is a red dwarf star located approximately from Earth in the southern constellation of Horologium. Even though it is a relatively nearby star, it has an apparent visual magnitude of about 13, so it can only be seen with a ...

, at a distance of just 3.68 parsecs, as the 20th closest star to Earth. The

main-belt asteroid The asteroid belt is a torus-shaped region in the Solar System, located roughly between the orbits of the planets Jupiter and Mars. It contains a great many solid, irregularly shaped bodies, of many sizes, but much smaller than planets, called ...

, 9861 Jahreiss (1991 RB3), is named in his honor.

References

External links

Hartmut Jahreiß directory page at the IAUHartmut Jahreiß personal page at the ARI
20th-century German astronomers 21st-century German astronomers Living people 1942 births Heidelberg University faculty {{Germany-astronomer-stub