| Discovery | |
|---|---|
| Discovered by | Catalina Sky Survey |
| Discovery date | 16 September 2009 |
| Designations | |
| 2009 SE | |
Martian L5  | |
| Orbital characteristics[1] | |
| Epoch 31 May 2020 (JD 2459000.5) | |
| Uncertainty parameter 0 | |
| Observation arc | 3133 days (8.58 yr) |
| Aphelion | 1.623684 AU (242.8997 Gm) |
| Perihelion | 1.425261 AU (213.2160 Gm) |
| 1.524472 AU (228.0578 Gm) | |
| Eccentricity | 0.0650794 |
| 1.88 yr (687.508 d) | |
| 240.916° | |
| 0° 31m 25.069s /day | |
| Inclination | 20.6248° |
| 6.82030° | |
| 354.156° | |
| Earth MOID | 0.42422 AU (63.462 Gm) |
| Jupiter MOID | 3.5304 AU (528.14 Gm) |
| Physical characteristics | |
| 400 m | |
| 0.5–0.05 (assumed) | |
| 19.9 | |
2009 SE is a small asteroid and Mars trojan orbiting near the L5 point of Mars (60 degrees behind Mars on its orbit).[2]
- ^ Cite error: The named reference
jplwas invoked but never defined (see the help page). - ^ de la Fuente Marcos, Carlos; de la Fuente Marcos, Raúl (March 2021). "Using Mars co-orbitals to estimate the importance of rotation-induced YORP break-up events in Earth co-orbital space". Monthly Notices of the Royal Astronomical Society. 501 (4): 6007–6025. arXiv:2101.02563. Bibcode:2021MNRAS.501.6007D. doi:10.1093/mnras/stab062.