Greenwich Meridian Marker, 1750-1851

Greenwich Meridian Marker, 1750-1851 (HM27RG)

Location: London, England SE10 8XJ Greater London
Country: United Kingdom
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N 51° 28.684', W 0° 0.093'

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This pillar was built in 1798 to help astronomers align the Observatory's meridian telescope in the building behind you. This telescope defined what was then the Greenwich Meridian established in 1750 and was kept accurately positioned by sighting a metal marker on the top of the pillar. In 1851 George Airy, 7th Astronomer Royal, installed a new telescope and moved the Greenwich Meridian a little to the east, to its current position. Between 1920 and 1950 this pillar was used as a support for a night-sky camera.
HM NumberHM27RG
Marker ConditionNo reports yet
Date Added Friday, May 25th, 2018 at 7:02am PDT -07:00
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Locationbig map
UTM (WGS84 Datum)30U E 708209 N 5707254
Decimal Degrees51.47806667, -0.00155000
Degrees and Decimal MinutesN 51° 28.684', W 0° 0.093'
Degrees, Minutes and Seconds51° 28' 41.04" N, 0° 0' 5.58" W
Driving DirectionsGoogle Maps
Which side of the road?Marker is on the right when traveling South
Closest Postal AddressAt or near Blackheath Ave, London England SE10 8XJ, GB
Alternative Maps Google Maps, MapQuest, Bing Maps, Yahoo Maps, MSR Maps, OpenCycleMap, MyTopo Maps, OpenStreetMap

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