2011 MD
2011 MD imaged by Spitzer in February 2014 | |
| Discovery | |
|---|---|
| Discovered by | LINEAR |
| Discovery site | Lincoln Lab's ETS |
| Discovery date | 2011 June 22 (first observed only) |
| Designations | |
| 2011 MD | |
| NEO · Apollo · Amor | |
| Orbital characteristics | |
| Epoch 13 July 2011 (JD 2455755.5) | |
| Uncertainty parameter 2 · 0 | |
| Observation arc | 2.65 yr (967 days) |
| Aphelion | 1.1031 AU |
| Perihelion | 1.0161 AU |
| 1.0596 AU | |
| Eccentricity | 0.0411 |
| 1.09 yr (398 days) | |
| 11.051° | |
| 0° 54m 13.32s / day | |
| Inclination | 2.5624° |
| 273.96° | |
| 4.6748° | |
| Earth MOID | 0.0003 AU (0.1 LD) |
| Physical characteristics | |
| 6 m (estimate) | |
Mean density | 1 g/cm3 (est. rubble pile) |
| 0.1937 h | |
| 0.3 | |
| 28.0 | |
2011 MD is a bright micro-asteroid, classified as near-Earth object of the Apollo and Amor group, respectively. On 27 June 2011, at around 17:00 UTC (13:00 EDT), the object passed exceptionally close to Earth's surface at a distance of approximately 12,000 kilometers (7,500 mi), roughly the diameter of the Earth.