9921 Rubincam
Orbit of Rubincam (blue), inner planets and Jupiter (outermost) | |
| Discovery | |
|---|---|
| Discovered by | S. J. Bus |
| Discovery site | Siding Spring Obs. |
| Discovery date | 2 March 1981 |
| Designations | |
| (9921) Rubincam | |
Named after | David Rubincam (American geophysicist) |
| 1981 EO18 | |
| main-belt · (inner) | |
| Orbital characteristics | |
| Epoch 4 September 2017 (JD 2458000.5) | |
| Uncertainty parameter 0 | |
| Observation arc | 63.45 yr (23,175 days) |
| Aphelion | 2.5174 AU |
| Perihelion | 2.2352 AU |
| 2.3763 AU | |
| Eccentricity | 0.0594 |
| 3.66 yr (1,338 days) | |
| 91.234° | |
| 0° 16m 8.76s / day | |
| Inclination | 2.4008° |
| 331.39° | |
| 89.205° | |
| Physical characteristics | |
| Dimensions | 4.10 km (calculated) 4.250±0.094 km |
| 8.01±0.03 h 8.014±0.0017 h | |
| 0.20 (assumed) 0.204±0.035 | |
| S | |
| 14.2 · 14.276±0.001 (R) · 14.3 | |
9921 Rubincam, provisional designation 1981 EO18, is a stony asteroid from the inner regions of the asteroid belt, approximately 4 kilometers in diameter. It was discovered on 2 March 1981, by American astronomer Schelte Bus at the Siding Spring Observatory in Australia, and later named after American geophysicist David Rubincam.