3181 Ahnert
3181 Ahnert, provisional designation 1964 EC, is a stony Flora asteroid from the inner regions of the asteroid belt, about 8 kilometers in diameter. It was discovered by German astronomer Freimut Börngen at the Karl Schwarzschild Observatory in Tautenburg, eastern Germany, on 8 March 1964.
| Discovery | |
|---|---|
| Discovered by | F. Börngen |
| Discovery site | Karl Schwarzschild Obs. |
| Discovery date | 8 March 1964 |
| Designations | |
MPC designation | (3181) Ahnert |
Named after | Paul Ahnert (astronomer) |
Alternative designations | 1964 EC · 1932 RK 1936 XJ · 1951 GC1 1964 DE · 1975 NH1 1975 RD · 1979 SC12 1979 UO4 · 1979 WD8 1979 WU1 · 1982 RE1 |
Minor planet category | main-belt · Flora |
| Orbital characteristics | |
| Epoch 4 September 2017 (JD 2458000.5) | |
| Uncertainty parameter 0 | |
| Observation arc | 86.12 yr (31,454 days) |
| Aphelion | 2.3743 AU |
| Perihelion | 2.0840 AU |
Semi-major axis | 2.2292 AU |
| Eccentricity | 0.0651 |
Orbital period (sidereal) | 3.33 yr (1,216 days) |
Mean anomaly | 9.5372° |
Mean motion | 0° 17m 45.96s / day |
| Inclination | 3.9579° |
Longitude of ascending node | 221.14° |
| 304.92° | |
| Physical characteristics | |
| Dimensions | 7.961±0.097 8.19 km (calculated) 8.511±0.031 km 8.57±0.24 km |
| 0.1856±0.0266 0.216±0.019 0.24 (assumed) 0.264±0.029 | |
| SMASS = S · S | |
| 12.40 · 12.6 · 12.8 · 12.98±0.06 | |
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