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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)
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LocationEngland
West Sussex
East Grinstead
N side of: Old Road
Distance (S) from Greenwich
OS map detailsOS Explorer: 135
OS grid refTQ 39946.38036
(539946,138036)
WGS84 lat/long51.124520, -0.001599
TypeMarker 'stone'
Marking date2000
AccessUnrestricted