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Hiroki Kosai

Japanese astronomer

dead

born: 1933
died: 2026
age at death: 93
known for: astronomer

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who hiroki kosai is

Hiroki Kosai was a Japanese astronomer with the Kiso Observatory. He is best known for helping to popularize astronomy in Japan and for his observations of comets and asteroids, most notably with his co-discovery of the comet 1976 XVI. He is credited by the Minor Planet Center (MPC) with the discovery of nearly 100 asteroids.

from wikipedia, used under CC BY-SA.

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wikidata records a date of death for Hiroki Kosai in 2026, which is how we know. your browser re-checks this against wikidata on every visit, so it’s current even if the page itself was cached a while ago.

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