147P/Kushida–Muramatsu
| 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 |
| Earliest precovery 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 |
| Earth MOID | 1.769 AU |
| Jupiter MOID | 0.429 AU |
| Physical characteristics[5][6] | |
| Dimensions | 0.42 km (0.26 mi) |
| 10.5±0.1 hours | |
| Comet total magnitude (M1) | 13.6 |
| Comet nuclear magnitude (M2) | 16.7 |
147P/Kushida–Muramatsu is a quasi-Hilda comet[7] discovered in 1993 by Japanese astronomers Yoshio Kushida and Osamu 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.[1] Several orbital calculations by Shuichi 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 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.[10]
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, (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 escaped Hilda asteroids.[7] Comet Shoemaker–Levy 9, which collided with Jupiter in 1994, is a more famous example of a quasi-Hilda comet.[7]
References
- ^ a b S. Nakano; Y. Kushida; O. Muramatsu; et al. (12 December 1993). D. W. Green (ed.). "Comet Kushida–Muramatsu (1993t)". IAU Circular. 5903 (1). Bibcode:1993IAUC.5903....1N.
- ^ "Comet Names and Designations". International Comet Quarterly. Retrieved 7 August 2025.
- ^ "147P/Kushida–Muramatsu – JPL Small-Body Database Lookup". ssd.jpl.nasa.gov. Jet Propulsion Laboratory. Retrieved 1 June 2019.
- ^ "147P/Kushida–Muramatsu Orbit". Minor Planet Center. Retrieved 18 June 2014.
- ^ P. L. Lamy; I. Toth; H. A. Weaver; M. F. A'Hearn; L. Jorda (2011). "Properties of the nuclei and comae of 10 ecliptic comets from Hubble Space Telescope multi-orbit observations★: HST observations of 10 ecliptic comets". Monthly Notices of the Royal Astronomical Society. 412 (3): 1573–1590. doi:10.1111/j.1365-2966.2010.17934.x.
- ^ R. Kokotanekova; C. Snodgrass; P. Lacerda; S. F. Green; S. C. Lowry; et al. (2017). "Rotation of cometary nuclei: new light curves and an update of the ensemble properties of Jupiter-family comets". Monthly Notices of the Royal Astronomical Society. 471 (3): 2974–3007. arXiv:1707.02133. Bibcode:2017MNRAS.471.2974K. doi:10.1093/mnras/stx1716.
- ^ a b c d e K. Ohtsuka; M. Yoshikawa; D. J. Asher; H. Arakida; H. Arakida (2008). "Quasi-Hilda comet 147P/Kushida–Muramatsu. Another long temporary satellite capture by Jupiter". Astronomy & Astrophysics. 489 (3): 1355–1362. arXiv:0808.2277. Bibcode:2008A&A...489.1355O. doi:10.1051/0004-6361:200810321. S2CID 14201751.
- ^ S. Nakano (16 December 1993). D. W. Green (ed.). "Periodic Comet Kushida–Muramatsu (1993t)". IAU Circular. 5908 (2). Bibcode:1993IAUC.5908....2N.
- ^ D. W. Green (6 January 1994). "Periodic Comet Kushida–Muramatsu (1993t)". IAU Circular. 5916 (2). Bibcode:1994IAUC.5916....2G.
- ^ S. Nakano; T. Oribe; B. G. Marsden; et al. (14 October 2000). D. W. Green (ed.). "Comet P/2000 T2 (Kushida–Muramatsu)". IAU Circular. 7507 (1). Bibcode:2000IAUC.7507....1N.
- ^ M. Campbell (14 September 2009). "Jupiter had brief encounter with icy companion". New Scientist. Retrieved 14 September 2009.
- ^ K. McElroy (14 September 2009). "Captured comet becomes moon of Jupiter". Cosmos Online. Archived from the original on 18 September 2009. Retrieved 15 September 2009.
External links
- 147P/Kushida–Muramatsu at the JPL Small-Body Database
- 147P/Kushida–Muramatsu at Seiichi Yoshida's website
- 147P/Kushida–Muramatsu at Gary W. Kronk's Cometography
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