Back 9921 Rubincam (كويكب) ARZ (9921) Rubincam CE 9921 Rubincam Esperanto (9921) Rubincam French 9921 Rubincam Hungarian (9921) 1981 EO18 Armenian 9921 Rubincam Italian 9921 Rubincam Romanian 9921 Rubincam Swedish (9921) Rubincam Tatar
 Orbit of Rubincam (blue), inner planets and Jupiter (outermost) | |
| Discovery [1] | |
|---|---|
| Discovered by | S. J. Bus |
| Discovery site | Siding Spring Obs. |
| Discovery date | 2 March 1981 |
| Designations | |
| (9921) Rubincam | |
Named after | David Rubincam (American geophysicist)[2] |
| 1981 EO18 | |
| main-belt · (inner) [3] | |
| Orbital characteristics [1] | |
| 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)[3] 4.250±0.094 km[4][5] |
| 8.01±0.03 h[6] 8.014±0.0017 h[7] | |
| 0.20 (assumed)[3] 0.204±0.035[4][5] | |
| S [3] | |
| 14.2[4] · 14.276±0.001 (R)[7] · 14.3[1][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.[2]
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