2011 WL2
| Discovery[1] | |
|---|---|
| Discovered by | Lincoln Laboratory ETS (now LINEAR) |
| Discovery site | Socorro, New Mexico, USA |
| Discovery date | November 16, 2011 |
| Designations | |
| MPC designation | 2011 WL2 |
| MPO 246965 | |
Apollo  NEO, PHA |
|
| Orbital characteristics[2] | |
| Epoch 13 January 2016 (JD 2457400.5) | |
| Uncertainty parameter 2 | |
| Observation arc | 386 days (1.06 yr) |
| Aphelion | 1.3833510 AU (206.94636 Gm) |
| Perihelion | 0.7723798 AU (115.54637 Gm) |
| 1.0778654 AU (161.24637 Gm) | |
| Eccentricity | 0.283417 |
| 1.12 yr (408.74 d) | |
|
Average orbital speed
|
28.10406 km/s |
| 336.9187° | |
| Inclination | 14.12974° |
| 212.9462° | |
| 88.83006° | |
| Earth MOID | 0.00141998 AU (212,426 km) |
| Jupiter MOID | 3.83997 AU (574.451 Gm) |
| Physical characteristics | |
| Dimensions | 190–420 m[3] |
| 20.8[2] | |
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2011 WL2 is a small asteroid that is a Near-Earth object, a Potentially Hazardous Asteroid, and an Apollo asteroid.
Orbit
The orbit of 2011 WL2 makes it a Potentially Hazardous Asteroid (PHA) whose orbit has been determined with about 1 year of observations. The orbit of 2011 WL2 is somewhat uncertain, but could pass a distance of 0.001635 AU (244,600 km) from the Earth in the year 2087.[2] Only the nominal (best-fit) orbit shows a passage this close. The uncertainty region is still somewhat large due to a short observation arc. For comparison, the distance to the Moon is about 0.0026 AU (384,400 km). 2011 WL2 appears on the list of PHA close approaches issued by the Minor Planet Center (MPC), with the next close approach in the year 2038.[4]
The Jupiter Tisserand invariant, used to distinguish different kinds of orbits, is 5.7.[2]
References
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- 2011 WL2 at the JPL Small-Body Database
| Preceded by | Large NEO Earth close approach (inside the orbit of the Moon) 26 October 2087 |
Succeeded by 2007 YV56 |
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