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Solar and Umbral Sizes in the Al-Khwārizmī and Peurbach Eclipse Tables

Gislén, Lars LU orcid (2025) In Journal of Astronomical History and Heritage 28(3). p.771-777
Abstract
We analyze and compare the structure of two tables, the tables of al-Khwārizmī and George Peurbach’s Tabulae Eclypsium, looking at the syzygy angular velocities of the Sun and the Moon and the angular radii of the Sun, the Moon and the lunar eclipse umbra. We show that part of the underlying structure has a mediaeval Indian origin. Finally, we compare recomputed tables with Peurbach’s tables.
Please use this url to cite or link to this publication:
author
organization
publishing date
type
Contribution to journal
publication status
published
subject
in
Journal of Astronomical History and Heritage
volume
28
issue
3
pages
7 pages
publisher
Science Press
ISSN
1440-2807
DOI
10.3724/SP.J.1440-2807.2025.03.11
language
English
LU publication?
yes
id
30d3a3f1-9bd2-479d-bc74-06ddab25972c
date added to LUP
2025-12-03 14:21:30
date last changed
2025-12-12 11:31:38
@article{30d3a3f1-9bd2-479d-bc74-06ddab25972c,
  abstract     = {{We analyze and compare the structure of two tables, the tables of al-Khwārizmī and George Peurbach’s Tabulae Eclypsium, looking at the syzygy angular velocities of the Sun and the Moon and the angular radii of the Sun, the Moon and the lunar eclipse umbra. We show that part of the underlying structure has a mediaeval Indian origin. Finally, we compare recomputed tables with Peurbach’s tables.}},
  author       = {{Gislén, Lars}},
  issn         = {{1440-2807}},
  language     = {{eng}},
  number       = {{3}},
  pages        = {{771--777}},
  publisher    = {{Science Press}},
  series       = {{Journal of Astronomical History and Heritage}},
  title        = {{Solar and Umbral Sizes in the Al-Khwārizmī  and Peurbach Eclipse Tables}},
  url          = {{https://lup.lub.lu.se/search/files/234737755/Paper_Gislen_Eclipse_Tables_04_.pdf}},
  doi          = {{10.3724/SP.J.1440-2807.2025.03.11}},
  volume       = {{28}},
  year         = {{2025}},
}