Bradley's meridian line

Bradley's meridian line (HM27RF)

Location: London, England SE10 8XJ Greater London
Country: United Kingdom
Buy United Kingdom flags at Flagstore.com!

N 51° 28.674', W 0° 0.093'

  • 0 likes
  • 0 check ins
  • 0 favorites
  • 24 views
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
Pictures
Sorry, but we don't have a picture of this historical marker yet. If you have a picture, please share it with us. It's simple to do. 1) Become a member. 2) Adopt this historical marker listing. 3) Upload the picture.
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

Is this marker missing? Are the coordinates wrong? Do you have additional information that you would like to share with us? If so, check in.

Check Ins  check in   |    all

Have you seen this marker? If so, check in and tell us about it.

Comments 0 comments

Maintenance Issues
  1. Is this marker part of a series?
  2. What historical period does the marker represent?
  3. What historical place does the marker represent?
  4. What type of marker is it?
  5. What class is the marker?
  6. What style is the marker?
  7. Does the marker have a number?
  8. What year was the marker erected?
  9. Who or what organization placed the marker?
  10. This marker needs at least one picture.
  11. Can this marker be seen from the road?
  12. Is the marker in the median?