2011 MD

2011 MD
2011 MD imaged by Spitzer in February 2014
Discovery[1][2]
Discovered byLINEAR
Discovery siteLincoln Lab's ETS
Discovery date2011 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 arc2.65 yr (967 days)
Aphelion1.1031 AU
Perihelion1.0161 AU
1.0596 AU
Eccentricity0.0411
1.09 yr (398 days)
11.051°
0° 54m 13.32s / day
Inclination2.5624°
273.96°
4.6748°
Earth MOID0.0003 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]

  1. ^ a b c d e f g Cite error: The named reference jpldata was invoked but never defined (see the help page).
  2. ^ Cite error: The named reference MPEC2011-M23 was invoked but never defined (see the help page).
  3. ^ a b c Cite error: The named reference MPC-object was invoked but never defined (see the help page).
  4. ^ a b Cite error: The named reference NASA2014-195 was invoked but never defined (see the help page).
  5. ^ a b Cite error: The named reference Mommert2014 was invoked but never defined (see the help page).
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  7. ^ Cite error: The named reference SKY1 was invoked but never defined (see the help page).
  8. ^ Cite error: The named reference NatGeo was invoked but never defined (see the help page).