Bradley's meridian line

Bradley's meridian line (HM27RF)

Location: London, England SE10 8XJ Greater London
Country: United Kingdom
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N 51° 28.674', W 0° 0.093'

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Inscription
James Bradley, third Astronomer Royal, observed with improved accuracy using the telescope (purchased in 1749) that first defined this line in 1750. Owing to the unequal length of solar days, astronomers measure the time using distant stars. Stars cross the meridian of an observer around every 23 hours and 56 minutes. Astronomers' clocks run slightly faster than normal clocks to show sidereal (star) time.
You are now standing on James Bradley's meridian line (1750). This is still the reference point for Ordnance Survey maps today.
Bradley preferred using this transit telescope (inside the building ahead of you) as it produced a wider range of measurements.
Details
HM NumberHM27RF
Tags
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 708210 N 5707235
Decimal Degrees51.47790000, -0.00155000
Degrees and Decimal MinutesN 51° 28.674', W 0° 0.093'
Degrees, Minutes and Seconds51° 28' 40.44" 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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