![]() 2011 MD imaged by Spitzer in February 2014 | |
Discovery[1][2] | |
---|---|
Discovered by | LINEAR |
Discovery site | Lincoln Lab's ETS |
Discovery date | 2011 June 22 (first observed only) |
Designations | |
2011 MD | |
NEO · Apollo[1] · Amor[3] | |
Orbital characteristics[1] | |
Epoch 13 July 2011 (JD 2455755.5) | |
Uncertainty parameter 2[1] · 0[3] | |
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)[4][5] | |
Mean density | 1 g/cm3 (est. rubble pile)[4] |
0.1937 h[1] | |
0.3[5] | |
28.0[1] | |
2011 MD is a bright micro-asteroid, classified as near-Earth object of the Apollo and Amor group, respectively.[1][3] 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.[6][7][8]
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