Comet Urata-Niijima is a periodic comet in the Solar System discovered by Japanese astronomers Tsuneo Niijima and Takeshi Urata on October 30, 1986, at Ojima. The first orbit was calculated by Brian G. Marsden on November 5 giving an orbital period of 6.42 years.
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Discovered by embedding cosine similarity (sentence-transformers MiniLM, 384-dim).