Observation of Donati comet in Japan on 1858

DOI Open Access

Bibliographic Information

Other Title
  • 安政五年ドナティ彗星観測にみる 土御門家の天文観測技術に関する一考察
  • Evaluation of the technical arts of astronomical observations at Tsuchimikado (Kyoto), Tenmongata (Edo) and Hazama (Osaka)
  • 江戸幕府天文方・間重遠の観測との比較から

Description

Donati comet (1858) was observed at Tsuchimikado, Tenmongata and Hazama observatories in Japan. Their daily observational records were found to give us numerical data of apparent positions of the comet and permit us to get equatorial coordinates of daily positions of the comet. Intercomparison among the three observatories records results in the followings. (1) Japanese technological arts of the astronomical observation did not attained the technical levels in Western observatories yet, (2) the obtained accuracies of the equatorial coordinates of the comet was within ±2 degrees, (3) Tsuchimikado is superior to the other two in the viewpoint of observational accuracy, and (4) Tenmongata and Hazama equatorial coordinates show systematic offsets, which we can see only in the short time-spans of observation records at the two observatories. The three observatories had common knowledge of astronomical position measurements and utilized the similar instruments both in the position measurements and the time reckoning. The difference of accuracies of measurements can be due to the setting accuracies of instruments, the robustness of the instruments and the human errors of the naked-eye observers.

Journal

  • Stars and Galaxies

    Stars and Galaxies 5 (0), 7-, 2022

    Center for Astronomy, University of Hyogo

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Keywords

Details 詳細情報について

  • CRID
    1390858010059497728
  • DOI
    10.32231/starsandgalaxies.5.0_7
  • ISSN
    2434270X
  • Text Lang
    ja
  • Article Type
    journal article
  • Data Source
    • JaLC
    • KAKEN
  • Abstract License Flag
    Allowed

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