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Seki Tsutomu
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Seki Tsutomu

Japanese amateur astronomer

Learn about this topic in these articles:

discovery of Comet Ikeya-Seki

  • Comet Ikeya-Seki
    In Comet Ikeya-Seki

    …amateur astronomers, Ikeya Kaoru and Seki Tsutomu. Moving in a highly inclined retrograde orbit, the comet made its closest approach to the Sun (perihelion) on October 21, 1965, at a distance of 1.67 solar radius, or only 466,000 km (290,000 miles), above the Sun’s photosphere (visible surface). The comet was…

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