10 relations: Arthur Auwers, Astrometry, Astronomical Calculation Institute (Heidelberg University), August Kopff, Hamal, Hipparcos, International Celestial Reference Frame, Iota Arietis, Kappa Aurigae, Star.
Georg Friedrich Julius Arthur von Auwers (September 12, 1838 – January 24, 1915) was a German astronomer.
Astrometry is the branch of astronomy that involves precise measurements of the positions and movements of stars and other celestial bodies.
The Astronomical Calculation Institute (Astronomisches Rechen-Institut; ARI) is a research institute in Heidelberg, Germany, dating from the 1700s.
August Kopff (February 5, 1882 – April 25, 1960) was a German astronomer and discoverer of several comets and asteroids.
Hamal, alternatively designated Alpha Arietis (α Arietis, abbreviated Alpha Ari, α Ari), is the brightest star in the northern zodiacal constellation of Aries.
Hipparcos was a scientific satellite of the European Space Agency (ESA), launched in 1989 and operated until 1993.
In astrometry, an International Celestial Reference Frame (ICRF) is a realization of the International Celestial Reference System (ICRS) using reference celestial sources observed at radio wavelengths.
Iota Arietis (ι Ari, ι Arietis) is the Bayer designation for a binary star system in the northern constellation of Aries.
Kappa Aurigae, Latinized as κ Aurigae, is the Bayer designation for a star in the northern constellation of Auriga.
A star is type of astronomical object consisting of a luminous spheroid of plasma held together by its own gravity.
Catalogue of Fundamental Stars, Catalogues of fundamental stars, FK3, FK4, FK5, FK6, Fifth Fundamental Catalog, Fifth Fundamental Catalogue, Fourth Fundamental Catalogue, Fundamental Katalog, Fundamental stars, Sixth Fundamental Catalogue.