2204 Lyyli
Shape model of Lyyli from its lightcurve | |
| Discovery | |
|---|---|
| Discovered by | Y. Väisälä |
| Discovery site | Turku Obs. |
| Discovery date | 3 March 1943 |
| Designations | |
| (2204) Lyyli | |
Named after | Lyyli Heinänen (Esperantist) |
| 1943 EQ · 1968 DN | |
| Mars-crosser | |
| Orbital characteristics | |
| Epoch 4 September 2017 (JD 2458000.5) | |
| Uncertainty parameter 0 | |
| Observation arc | 73.75 yr (26,937 days) |
| Aphelion | 3.6435 AU |
| Perihelion | 1.5354 AU |
| 2.5894 AU | |
| Eccentricity | 0.4071 |
| 4.17 yr (1,522 days) | |
| 350.25° | |
| Inclination | 20.561° |
| 160.45° | |
| 283.25° | |
| Earth MOID | 0.6872 AU |
| Mars MOID | 0.2547 AU |
| Physical characteristics | |
| 25.16±2.4 km (IRAS:11) 25.27 km (derived) 27.12±1.31 km | |
| 9.51±0.01 h 10 h 11.063±0.001 h 11.09±0.01 h | |
| 0.020±0.002 0.0232±0.005 (IRAS:11) 0.050±0.006 0.0537 (derived) | |
| SMASS = X · P · X | |
| 11.61±0.44 · 11.78 · 12.1 · 12.70 | |
2204 Lyyli (prov. designation: 1943 EQ) is a dark asteroid and very eccentric Mars-crosser from the middle region of the asteroid belt, approximately 25 kilometers (16 miles) in diameter. It was discovered on 3 March 1943 by Finnish astronomer Yrjö Väisälä at Turku Observatory in Southwest Finland.