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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
LB Greenwich
Greenwich (SE10)
Trinity Hospital, Old Woolwich Road
Distance (N) from Greenwich
OS map detailsOS Explorer: 161 or 162
OS grid refTQ 38871.78034
(538871,178034)
WGS84 lat/long51.484216, -0.001395
TypeSundial
Marking date2007
AccessNone, but visible from public road