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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)
The Millennium
Millennium Tree Line (MTL)
Meridian Laser
Astronomers Royal
Telescopes used with Meridian Marks
 
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LocationEngland
Hertfordshire
Royston
N side of: Newmarket Road
Distance (N) from Greenwich
OS map detailsOS Explorer: 209
OS grid refTL 37132.40870
(537132,240870)
WGS84 lat/long52.049262, -0.001641
TypeSign on post(s)
Marking dateUnknown
AccessUnrestricted