Article ID: CBB122640982

The solar eclipse of A.D. 1221 May 23 and the value of ΔT (2023)

unapi

A total solar eclipse was recorded in a classic Chinese book with the title The Travels of an Alchemist: the Journey of the Taoist Ch’ang Ch’un from China to the Hindukush at the Sumons of Chingiz Khan. In the present paper, possible locations of the solar eclipse observation are investigated, taking into account the geographical characteristics of local environments. With a modern astronomical planetary ephemeris, the authors confirm the observation records and derive an upper limit of +768 seconds for the ΔT value at the epoch A.D. 1221.

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Authors & Contributors
Stephenson, F. Richard
Hohenkerk, Catherine Y.
Morrison, Leslie V.
Betts, Jonathan
Blondé, Bruno
Degni, Silvia
Journals
Journal for the History of Astronomy
Journal of Astronomical History and Heritage
Archive for History of Exact Sciences
Continuity and Change
Early Science and Medicine: A Journal for the Study of Science, Technology and Medicine in the Pre-modern Period
Environmental History
Publishers
Cambridge University Press
Amsterdam University Press
MIT Press
Oxford University Press
University of Chicago Press
University of Illinois Press
Concepts
Time measurement
Time perception
Solar eclipse
Solar astronomy
Astronomy
Science and society
People
Benussi, Vittorio
Calabresi, Renata
De Sarlo, Francesco
Homer
Mach, Ernst
Newton, Isaac
Time Periods
17th century
Ancient
18th century
19th century
Medieval
20th century
Places
China
Europe
Middle and Near East
Great Britain
Alexandria (Egypt)
Ireland
Institutions
École Normale Supérieure, Paris
Mars Exploration Rover Mission (U.S.)
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