2011 MD

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Asteroid
2011 MD
Trajectory of near-Earth asteroid 2011 MD 1.gif
Properties of the orbit ( animation )
Orbit type Apollo type
Major semi-axis 1.0560  AU
eccentricity 0.037879
Perihelion - aphelion 1.0160 AU - 1.0960 AU
Inclination of the orbit plane 2.449 °
Sidereal period 396 d 9h
Physical Properties
Medium diameter 10 to 45 m
Rotation period 0.3875h
history
Explorer LINEAR
Date of discovery June 22, 2011
Source: Unless otherwise stated, the data comes from JPL Small-Body Database Browser . The affiliation to an asteroid family is automatically determined from the AstDyS-2 database . Please also note the note on asteroid items.

2011 MD is a near-Earth asteroid with an Earth-like orbit.

2011 MD was discovered by LINEAR on June 22, 2011 , initially mistaken for space debris.

On June 27, 2011 around 17:00 UTC, 2011 MD came to within approximately 12,000 km of Earth.

After the passage through the earth, there was initially an observed deviation of 20 arc seconds from the calculated position. The reason is that in 2011 MD penetrated so deeply into the earth's gravitational field that not only the mass, but also the otherwise neglected flattening of the earth had a measurable influence on its orbit. This effect will be taken into account in the software for the calculation of near-Earth asteroid passages after this passage in the future.

2011 MD was a possible target of NASA's planned asteroid redirect mission planned for 2019 but canceled in 2017 .

See also

Web links

Individual evidence

  1. ↑ http://www.dangl.at/2011/2011_md/2011_md.htm
  2. ↑ 2011 MD JPL Small-Body Database Browser. Retrieved June 27, 2011 .
  3. ↑ Small Asteroid to Whip Past Earth on June 27, 2011. Retrieved June 27, 2011 .
  4. ↑ Earth flyby through the asteroid 2011 MD on June 27, 2011. Accessed July 8, 2011 .
  5. ↑ Asteroid Flyby Yields New Thinking. Retrieved July 8, 2011 .
  6. ↑ Very close asteroid passage with a surprising orbit effect. Retrieved July 8, 2011 .
  7. ↑ NASA Announces Latest Progress, Upcoming Milestones in Hunt for Asteroids nasa.gov, accessed June 25, 2014
  8. ↑ Combining forces against a global threat nzz.ch