147P/Kushida–Muramatsu

Observational history

The comet was discovered photographically by Yoshio Kushida and Osamu Muramatsu from the Yatsugatake South Base Observatory on the night of 8 December 1993. Several orbital calculations by Shuichi Nakano later determined its periodic nature, at the time it has an orbital period of 7.40 years.

It was later recovered from the Saji Observatory on October 2000, where Brian G. Marsden and other astronomers were able to identify it as the same object as Kushida–Muramatsu of 1993.

Origin

According to calculations made by Katsuhiko Ohtsuka of the Tokyo Meteor Network and David Asher of Armagh Observatory, Kushida–Muramatsu was temporarily captured by Jupiter as an irregular moon between 14 May 1949, and 15 July 1962, ( years). It is the fifth such object known to have been captured.

It is thought that quasi-Hilda comets may be escaped Hilda asteroids. Comet Shoemaker–Levy 9, which collided with Jupiter in 1994, is a more famous example of a quasi-Hilda comet.

References

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