Effelsberg 100-m Radio Telescope

The Effelsberg 100-m Radio Telescope is a radio telescope in the Ahr Hills (part of the Eifel) in Bad Münstereifel, Germany. For 29 years the Effelsberg Radio Telescope was the largest fully steerable radio telescope on Earth, surpassing the Lovell Telescope in the UK. In 2000, it was surpassed by the Green Bank Observatory's Robert C. Byrd Green Bank Telescope in Green Bank, US, which has a slightly larger elliptical 100 by 110-metre aperture.

Effelsberg 100-m Radio Telescope
Part ofEuropean VLBI Network 
Location(s)Effelsberg, Bad Münstereifel, Euskirchen, Cologne, North Rhine-Westphalia, Germany
Coordinates50°31′29″N 6°52′58″E
OrganizationMax Planck Institute for Radio Astronomy 
Altitude319 m (1,047 ft)
Wavelength408, 86,000 MHz (73.48, 0.35 cm)
Built1968–1971 (1968–1971)
Telescope styleradio telescope 
Diameter100 m (328 ft 1 in)
Collecting area7,850 m2 (84,500 sq ft)
Focal length30 m (98 ft 5 in)
Websitewww.mpifr-bonn.mpg.de/en/effelsberg
Location of Effelsberg 100-m Radio Telescope
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