9344 Klopstock
9344 Klopstock, provisional designation 1991 RB4, is a background asteroid from the inner regions of the asteroid belt. It was discovered on 12 September 1991, by German astronomers Freimut Börngen and Lutz Schmadel at the Karl Schwarzschild Observatory in Tautenburg, Germany. Poor observational data suggests that the asteroid is one of the darkest known objects with a diameter of approximately 17 kilometers (11 miles), while it is also an assumed stony asteroid with a much smaller diameter. It has a rotation period of 5.84 hours and was named after German poet Friedrich Gottlieb Klopstock.
| Discovery | |
|---|---|
| Discovered by | F. Börngen L. D. Schmadel |
| Discovery site | Karl Schwarzschild Obs. |
| Discovery date | 12 September 1991 |
| Designations | |
MPC designation | (9344) Klopstock |
Named after | Friedrich Gottlieb Klopstock (German poet) |
Alternative designations | 1991 RB4 · 1995 WK2 |
Minor planet category | main-belt · (inner) background · Vestian |
| Orbital characteristics | |
| Epoch 23 March 2018 (JD 2458200.5) | |
| Uncertainty parameter 0 | |
| Observation arc | 26.35 yr (9,626 d) |
| Aphelion | 2.5711 AU |
| Perihelion | 2.1575 AU |
Semi-major axis | 2.3643 AU |
| Eccentricity | 0.0875 |
Orbital period (sidereal) | 3.64 yr (1,328 d) |
Mean anomaly | 342.64° |
Mean motion | 0° 16m 15.96s / day |
| Inclination | 5.0293° |
Longitude of ascending node | 340.39° |
| 156.40° | |
| Physical characteristics | |
Mean diameter | 3.66 km (calculated) 17.05±1.5 km |
Synodic rotation period | 5.842±0.0031 h |
| 0.0116±0.002 0.20 (assumed) | |
| S (assumed) | |
| 14.095±0.003 (R) 14.2 14.55 14.86±0.14 | |
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