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Royal Observatory Greenwich
Latitude and Longitude
Airy Transit Circle (ATC)
WGS84 and the Greenwich Meridian
The Greenwich Meridian before the ATC
The Quest for Longitude
International Meridian Conference (1884)
Meridian Day (1984)
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Telescopes used with Meridian Marks
 
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LocationEngland
West Sussex
East Grinstead
East Court, College Lane
Distance (S) from Greenwich
OS map detailsOS Explorer: 135
OS grid refTQ 39932.38602
(539932,138602)
WGS84 lat/long51.129609, -0.001579
TypeBoulder
Marking date2000
AccessUnrestricted