2013

TQ3877 : Time ball hoisted, Old Royal Greenwich Observatory

taken 11 years ago, near to Greenwich, England

Time ball hoisted, Old Royal Greenwich Observatory
Time ball hoisted, Old Royal Greenwich Observatory
The time ball drops at 13.00 GMT precisely; here it has been hoisted half way up at 12.56. Time balls were provided so that mariners in nearby ships could set their chronometers accurately by observing the ball through a telescope, taking the initial drop of the ball as the time signal. This one was installed in 1833.

Of course, time balls are now obsolete but are kept as items of historial interest.

Creative Commons Licence [Some Rights Reserved]   © Copyright Jim Barton and licensed for reuse under this Creative Commons Licence.
Geographical Context: Historic sites and artefacts Park and Public Gardens other tags: Royal Observatory Greenwich Click a tag, to view other nearby images.
This photo is linked from: Automatic Clusters: · Greenwich [1655] · Royal Naval College [587] · Royal Observatory [245] · Old Royal Naval College [183] · Tall Ships Saturday [128] ·
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TQ3877, 2325 images   (more nearby 🔍)
Photographer
Jim Barton   (more nearby)
Date Taken
Thursday, 12 December, 2013   (more nearby)
Submitted
Monday, 16 December, 2013
Subject Location
OSGB36: geotagged! TQ 3885 7733 [10m precision]
WGS84: 51:28.6737N 0:0.1184W
Camera Location
OSGB36: geotagged! TQ 3887 7731
View Direction
Northwest (about 315 degrees)
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Image classification(about): Supplemental image
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