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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
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International Meridian Conference (1884)
Meridian Day (1984)
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Telescopes used with Meridian Marks
 
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LocationEngland
Cambridgeshire
Somersham
Church Street (adjacent church)
Distance (N) from Greenwich
OS map detailsOS Explorer: 225
OS grid refTL 36048.77840
(536048,277840)
WGS84 lat/long52.381702, -0.002590
TypeBoulder
Marking date2001
AccessUnrestricted