| Discovery[1] | |
|---|---|
| Discovered by | Yoshio Kushida Osamu Muramatsu |
| Discovery site | Yatsugatake, Japan |
| Discovery date | 8 December 1993 |
| Designations | |
| P/1993 X1 P/2000 T2 | |
| 1993 XIX, 1993t[2] | |
| Orbital characteristics[3][4] | |
| Epoch | 17 October 2024 (JD 2460600.5) |
| Observation arc | 22.09 years |
| Earliestprecovery date | 7 December 1993 |
| Number of observations | 290 |
| Aphelion | 4.859 AU |
| Perihelion | 3.159 AU |
| Semi-major axis | 4.009 AU |
| Eccentricity | 0.21196 |
| Orbital period | 8.03 years |
| Inclination | 2.312° |
| 91.667° | |
| Argument of periapsis | 348.57° |
| Mean anomaly | 38.623° |
| Last perihelion | 6 December 2023 |
| TJupiter | 3.011 |
| EarthMOID | 1.769 AU |
| JupiterMOID | 0.429 AU |
| Physical characteristics | |
| Dimensions | 0.42 km (0.26 mi)[5] |
| 10.5±0.1 hours[6] | |
| Comet total magnitude (M1) | 13.6[3] |
| Comet nuclear magnitude (M2) | 16.7[3] |
147P/Kushida–Muramatsu is aquasi-Hilda comet[7] discovered in 1993 by Japanese astronomersYoshio Kushida andOsamu Muramatsu.
The comet was discovered photographically byYoshio Kushida andOsamu Muramatsu from theYatsugatake South Base Observatory on the night of 8 December 1993.[1] Several orbital calculations byShuichi Nakano later determined its periodic nature, at the time it has an orbital period of 7.40 years.[8][9]
It was later recovered from theSaji Observatory on October 2000, whereBrian G. Marsden and other astronomers were able to identify it as the same object as Kushida–Muramatsu of 1993.[10]
According to calculations made by Katsuhiko Ohtsuka of the Tokyo Meteor Network and David Asher of Armagh Observatory, Kushida–Muramatsu was temporarily captured byJupiter as an irregular moon between 14 May 1949, and 15 July 1962, (12.17+0.29
−0.27 years).[7][11] It is the fifth such object known to have been captured.[7][12]
It is thought that quasi-Hilda comets may be escapedHilda asteroids.[7]Comet Shoemaker–Levy 9, which collided with Jupiter in 1994, is a more famous example of a quasi-Hilda comet.[7]
| Numbered comets | ||
|---|---|---|
| Previous 146P/Shoemaker–LINEAR | 147P/Kushida–Muramatsu | Next 148P/Anderson–LINEAR |
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