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Discovery and designation
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| Discovered by | Reinmuth, K. |
| Discovery date | 1929-Sep-29 |
| Epoch Orbital Elements at Epoch 2454400.5 (2007-Oct-27.0) TDB | |
| Aphelion | 3.4437326 AU |
| Perihelion | 2.8950414 AU |
| Semi-major axis | 3.169387 AU |
| Eccentricity | 0.0865611 |
| Orbital period | 2060.9209374 days 5.64 years |
| Mean anomaly | 309.27750 ° |
| Inclination | 9.37692 ° |
| Longitude of ascending node | 72.93956 ° |
| Argument of perihelion | 304.65059 ° |
| Dimensions | diameter 30.37 km |
| Geometric albedo | 0.0439 |
| Absolute magnitude (H) | 11.60 mag |
1161 Thessalia is a main belt asteroid orbiting the Sun. Approximately 30 kilometers in diameter, it makes a revolution around the Sun once every 6 years. It was discovered by Karl Wilhelm Reinmuth at Heidelberg, Germany on September 29, 1929. Its provisional designation was 1929 SF.[1]
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