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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
LB Greenwich
Greenwich (SE10)
Chimney of: Ranger's House, Chesterfield Walk
Distance (S) from Greenwich
OS map detailsOS Explorer: 161 or 162
OS grid refTQ 38895.76829
(538895,176829)
WGS84 lat/long51.473382, -0.001523
TypeAstronomical
Marking date1750
AccessNone, but visible from Chesterfield Walk. Mark no longer present