9971 Ishihara
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Orbit of 9971 Ishihara (blue), planets (red) and the Sun (black). The outermost planet visible is Jupiter. | |||||||||||||
| Discovery | |||||||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Discovered by | K. Endate & K. Watanabe | ||||||||||||
| Discovery date | 16 April 1993 | ||||||||||||
| Designations | |||||||||||||
| MPC designation | 9971 Ishihara | ||||||||||||
| 1993 HS, 1991 YC2, 1996 EU1 | |||||||||||||
| Orbital characteristics[1] | |||||||||||||
| Epoch 13 January 2016 (JD 2457400.5) | |||||||||||||
| Uncertainty parameter 0 | |||||||||||||
| Observation arc | 8544 days (23.39 yr) | ||||||||||||
| Aphelion | 2.4456765 AU (365.86800 Gm) | ||||||||||||
| Perihelion | 1.916716 AU (286.7366 Gm) | ||||||||||||
| 2.1811963 AU (326.30232 Gm) | |||||||||||||
| Eccentricity | 0.1212546 | ||||||||||||
| 3.22 yr (1176.6 d) | |||||||||||||
| 335.21055° | |||||||||||||
| 0° 18m 21.449s / day | |||||||||||||
| Inclination | 2.748450° | ||||||||||||
| 20.55133° | |||||||||||||
| 245.95179° | |||||||||||||
| Earth MOID | 0.901497 AU (134.8620 Gm) | ||||||||||||
| Jupiter MOID | 2.61499 AU (391.197 Gm) | ||||||||||||
| Jupiter Tisserand parameter | 3.669 | ||||||||||||
| Physical characteristics | |||||||||||||
| Dimensions | ~22.4 km[2] | ||||||||||||
| 6.7152 h (0.27980 d) | |||||||||||||
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| 13.8 | |||||||||||||
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9971 Ishihara is a main belt asteroid. It orbits the Sun once every 3.22 years.[1]
Discovered on April 16, 1993 by K. Endate and K. Watanabe it was given the provisional designation 1993 HS. It was later renamed Ishihara after Takahiro Ishihara, a former president of the Hiroshima Astronomical Society.[3]
References
- 1 2 "9971 Ishihara (1993 HS)". JPL Small-Body Database. NASA/Jet Propulsion Laboratory. Retrieved 13 April 2016.
- ↑ Tedesco E.F.; Noah P.V.; Noah M.; Price S.D. "The supplemental IRAS minor planet survey (SIMPS)".
- ↑ MPC 47298 Minor Planet Center
External links
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