Astronomical and navigational instruments, Sundials

The Collection

Your selection

Title

Actions

Buy this image Add this to a collection
Tags
Share or embed this object   
 

Equinoctial dial

AST0248
Astronomical and navigational instruments

Object connections:

Collection Astronomical and navigational instruments, Sundials
Gallery locationROG (Floor plans)
PeopleHistorical Association: Queen Elizabeth II
Maker: Russell, Edwin
Designer: Daniel, Christopher
Publication(s)Sundials at Greenwich

View this book in the library

Object details:

Object ID AST0248
Description Dolphin equinoctial dial for latitude 51° 28' North. The dial sits on an octagonal plinth made of Portland stone. A cresting wave is set on the plinth and supports the curved dial-plate, which forms part of a cylinder and is inclined so that it lies in the plane of the Equator. Two bronze dolphins hold the dial-plate in their mouths and curve over so that their tails almost meet above the dial-plate. The centre of the gap between the two tails acts as the gnomon. There are two dial-plates and two rims: the rims are set for Greenwich Mean Time and British Summer Time. Each rim is engraved with the names of the makers and the words 'FOR NOW IS ALL THE TIME THERE MAY BE'. The dolphin dial was designed in 1977 by Christopher Daniel, Head of Education Services at the NMM, to mark the occasion of Queen Elizabeth II's Silver Jubilee. The sculpture was made by Edwin Russell and the object was cast at Brookbrae in London. The dial was unveiled on 5 June 1978 at 1 pm (midday, Greenwich Mean Time) in a specially designed paved setting in the Museum's south grounds. In 2009, after removal as part of preparatory work for the Sammy Ofer Wing, it was resited as centrepiece of the redesigned Astronomer's Garden at the Royal Observatory . The use of the different dial rims for Greenwich Mean Time and British Summer Time and of the two different hour-plates with the hour-lines marked as half of the analemma, means that the instrument is always accurate to the nearest minute. The rims are changed when the clocks change for daylight saving at the end of March and October while the hour-plates are changed at the solstices in June and December. For more information regarding this dial please refer to the OUP & NMM catalogue, 'Sundials at Greenwich', pp.158-159.
Date made 1977

Artist/Maker Day-Lewis
Russell, Edwin
Daniel, Christopher
Place made London, England
Credit National Maritime Museum, Greenwich, London
Materials bell metal; portland stone; bronze
Measurements Overall: 1100 x 1250 mm
Parts
Help us

Do you know more about this?

Share your knowledge