Comet Ikeya Seki

The long-period Comet Ikeya-Seki is one of a group of Sun-grazing comets having similar orbits, including the Great Comet of 1882. Comet Ikeya-Seki was discovered Sept. 18, 1965, by

Comet Ikeya-Seki, 1966. Roger Lynds/NOAO/AURA/NSF

two Japanese amateur astronomers, Ikeya Kaoru and Seki Tsutomu . Moving in a retrograde orbit, the comet made its closest approach to the Sun on Oct. 21, 1965, at a distance less than a solar radius from the surface. The comet was then bright enough to be seen with the naked eye in daylight. Like the similarly spectacular Great Comet of 1882, it was fragmented by tides induced by its proximity to the Sun; Ikeya-Seki gave astronomers their first chance since 1882 to study a comet in such conditions. It is assumed that the group of Sun-grazing comets to which Ikeya-Seki belongs represents the remnants of a single, larger comet that also was fragmented by solar tides at some time in the past.

_comet morehouse_

Comet Morehouse was a very bright comet in a retrograde, quasi-parabolic orbit, remarkable for variations in the form and structure of its tail. It was named after Daniel Walter Morehouse, a U.S. astronomer, and was observed from September 1908 to May 1909. On several occasions the tail appeared to break into fragments and to be completely separated from the head. Also, the tail became visible at twice Earth's

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