1009 Sirene
| Discovery | |
|---|---|
| Discovered by | K. Reinmuth |
| Discovery site | Heidelberg Obs. |
| Discovery date | 31 October 1923 |
| Designations | |
| (1009) Sirene | |
| Pronunciation | German: [ˈziːʁeːnə] |
Named after | Siren (Σειρήν - Sīrēn) (Greek mythology) |
| 1923 PE | |
| Mars-crosser | |
| Orbital characteristics | |
| Epoch 4 September 2017 (JD 2458000.5) | |
| Uncertainty parameter 0 | |
| Observation arc | 92.69 yr (33,854 days) |
| Aphelion | 3.8207 AU |
| Perihelion | 1.4259 AU |
| 2.6233 AU | |
| Eccentricity | 0.4564 |
| 4.25 yr (1,552 days) | |
| 11.512° | |
| 0° 13m 55.2s / day | |
| Inclination | 15.775° |
| 229.46° | |
| 186.35° | |
| Earth MOID | 0.4384 AU · 170.8 LD |
| Physical characteristics | |
| Dimensions | 5 km (est. at 0.20) |
| 13.9 | |
Sirene (minor planet designation: 1009 Sirene), provisional designation 1923 PE, is an eccentric asteroid and sizable Mars-crosser from the central regions of the asteroid belt, approximately 5 kilometers in diameter. It was discovered by German astronomer Karl Reinmuth at the Heidelberg-Königstuhl State Observatory on 31 October 1923. The asteroid was named after the Siren from Greek mythology.