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Study on Secular Change of the Earth’s Rotation Rate Based on Solar Eclipse Observation Records on October 13, 443 BC Cover

Study on Secular Change of the Earth’s Rotation Rate Based on Solar Eclipse Observation Records on October 13, 443 BC

Artificial Satellites
Volume 58 (2023): Issue 2 (June 2023)
By: Lihua MA  
Open Access
|Jul 2023

Figures & Tables

Figure 1.

Solar eclipse path of October 13, 443 BC (under the TDT time system). The lower curve gives the southern boundary of visible partial solar eclipse. The approximate circles on the left and right sides give areas where the eclipse is visible at sunrise and sunset, respectively. The left and right halves of every circle correspond to the boundaries where the first contact stage (partial eclipse begins) and the fourth contact stage (partial eclipse ends) can be observed, respectively.
Solar eclipse path of October 13, 443 BC (under the TDT time system). The lower curve gives the southern boundary of visible partial solar eclipse. The approximate circles on the left and right sides give areas where the eclipse is visible at sunrise and sunset, respectively. The left and right halves of every circle correspond to the boundaries where the first contact stage (partial eclipse begins) and the fourth contact stage (partial eclipse ends) can be observed, respectively.

Sunset time from two twilight conditions

ΔT (s)Twilight with a solar altitude angle of 0°Civil twilightDifference (s)
TDT (h:min:s)LT (h:min:s)TDT (h:min:s)LT (h:min:s)
11,43613:34:4417:33:0514:03:5618:02:171752
17,22615:11:2517:33:0015:40:3718:02:121752
DOI: https://doi.org/10.2478/arsa-2023-0005 | Journal eISSN: 2083-6104 | Journal ISSN: 1509-3859
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Language: English
Page range: 56 - 62
Submitted on: Nov 8, 2022
Accepted on: May 25, 2023
Published on: Jul 18, 2023
Published by: Polish Academy of Sciences, Space Research Centre
In partnership with: Paradigm Publishing Services
Publication frequency: 4 issues per year
Keywords:
solar eclipse observation,
Earth’s rotation,
astronomical planetary ephemeris
Related subjects:
Geosciences,
Geosciences, other

© 2023 Lihua MA, published by Polish Academy of Sciences, Space Research Centre
This work is licensed under the Creative Commons Attribution 4.0 License.

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