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Astron. Astrophys. 322, 347-351 (1997)

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The solar eclipse observed by Clavius in A.D. 1567

F.R. Stephenson 1, J.E. Jones 2 and L.V. Morrison 3

1 Department of Physics, University of Durham, DH1 3LE, UK
2 Proudman Oceanographic Laboratory, Bidston Observatory, Birkenhead, Merseyside, L43 7RA, UK
3 Royal Greenwich Observatory, Madingley Road, Cambridge, CB3 0EZ, UK

Received 14 June 1996 / Accepted 17 September 1996

Abstract

The careful description of the solar eclipse of A.D. 1567 by Clavius is used to derive limits to the Earth's rotational clock error ([FORMULA] T) of between 145 and 165 sec at this date. This result provides an important link between the [FORMULA] T curve as deduced from ancient and medieval eclipse observations and that obtained from telescopic data.

Key words: eclipses – time – Earth

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© European Southern Observatory (ESO) 1997

Online publication: June 30, 1998
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