113390 Helvetia
113390 Helvetia (provisional designation 2002 SU19) is a background asteroid from the inner regions of the asteroid belt, approximately 2.2 kilometers (1.4 miles) kilometers in diameter. It was discovered on 29 September 2002, by Swiss astronomer Markus Griesser at the Eschenberg Observatory in Winterthur, near Zürich, Switzerland. The presumed stony Florian asteroid was named after the Swiss national symbol, Helvetia.
| Discovery | |
|---|---|
| Discovered by | M. Griesser |
| Discovery site | Eschenberg Obs. |
| Discovery date | 29 September 2002 |
| Designations | |
MPC designation | (113390) Helvetia |
Named after | Helvetia (Swiss symbol and national personification) |
Alternative designations | 2002 SU19 · 2001 FS166 |
Minor planet category | main-belt · (inner) background · Flora |
| Orbital characteristics | |
| Epoch 27 April 2019 (JD 2458600.5) | |
| Uncertainty parameter 0 | |
| Observation arc | 57.45 yr (20,985 d) |
| Aphelion | 2.7712 AU |
| Perihelion | 1.8353 AU |
Semi-major axis | 2.3033 AU |
| Eccentricity | 0.2032 |
Orbital period (sidereal) | 3.50 yr (1,277 d) |
Mean anomaly | 314.06° |
Mean motion | 0° 16m 55.2s / day |
| Inclination | 7.3588° |
Longitude of ascending node | 298.47° |
| 8.6509° | |
| Physical characteristics | |
Mean diameter | 2.196±0.360 |
| 0.231±0.103 | |
| S (assumed) | |
| 15.5 15.6 | |
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