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Discovery
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|---|---|
| Discovered by | Takao Kobayashi |
| Discovery site | Ōizumi Observatory |
| Discovery date | January 29, 1997 |
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Designations
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| MPC designation | 9231 |
| Named after | Shimaken |
| Alternate name(s) | 1997 BB2 |
| Minor planet category |
main-belt minor planet |
| Aphelion | 2.4434061 AU (365,528,349.815 km) |
| Perihelion | 1.8718329 AU (280,022,216.146 km) |
| Semi-major axis | 2.1576195 AU (322,775,282.981 km) |
| Eccentricity | 0.1324546 |
| Orbital period | 1157.6058499 days 3.17 years |
| Mean anomaly | 291.03318° |
| Inclination | 3.13671° |
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Physical characteristics
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| Absolute magnitude (H) | 14.1 |
9231 Shimaken (provisional designation: 1997 BB2) is a main-belt minor planet. It was discovered by Takao Kobayashi at the Ōizumi Observatory in Ōizumi, Gunma Prefecture, Japan, on January 29, 1997. It is named for Shimaken, a research group led by Toshihiko Shimamoto of Kyoto University.[1]
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