The Reliability of the Records of Observed Solar Eclipses in India and Comparison with Contemporaneous Eclipse Data from Other Countries

  • Kiyotaka TanikawaEmail author
  • Mitsuru Sôma
  • B. S. Shylaja
  • Mayank Vahia
Conference paper
Part of the Astrophysics and Space Science Proceedings book series (ASSSP, volume 54)


In this paper, we examine the reliability of the records of solar eclipses observed in southern India taken from recently compiled records of solar eclipses. Observations in AD 938, 1087 and 1268 survived the preliminary examination of reliability. We have carried out a more precise examination utilising the so called ‘Sôma Diagram’, which determines the ΔT values of the periods with the aid of contemporaneous eclipse data from other countries. Finally, the Indian observations of AD 938, 1087 and 1268 have been incorporated into the determination of a narrower range of ΔT values. We will describe the examination process and give these three ranges.


Observed years

Range of ΔT


912, 938, 939, 968

1513 s < ΔT < 2164 s


1061, 1069, 1087

1197 s < ΔT < 1673 s


1245, 1267, 1268, 1275

98 s < ΔT < 806 s


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Copyright information

© Hindustan Book Agency 2018 and Springer Nature Singapore Pte Ltd. 2019

Authors and Affiliations

  • Kiyotaka Tanikawa
    • 1
    Email author
  • Mitsuru Sôma
    • 1
  • B. S. Shylaja
    • 2
  • Mayank Vahia
    • 3
  1. 1.National Astronomical Observatory of JapanMitakaJapan
  2. 2.Jawaharlal Nehru PlanetariumBengaluruIndia
  3. 3.Department of Astronomy & AstrophysicsTata Institute of Fundamental ResearchMumbaiIndia

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