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List of asteroid close approaches to Earth in 2012 is a listing of
NEO Earth Close Approaches
/ref> This list does not include any of the objects that collided with earth in 2012, none of which were discovered in advance, but were recorded by sensors designed to detect detonation of nuclear devices.
(size of a person for comparison)
Abs Magnitude 29-30
Absolute Magnitude 28-29
Absolute Magnitude 27-28
Absolute Magnitude 26-27
Absolute Magnitude 25-26
Absolute Magnitude less than 25 (largest)
asteroids
An asteroid is a minor planet of the inner Solar System. Sizes and shapes of asteroids vary significantly, ranging from 1-meter rocks to a dwarf planet almost 1000 km in diameter; they are rocky, metallic or icy bodies with no atmosphere.
...
noted for their close approach to planet Earth
Earth is the third planet from the Sun and the only astronomical object known to harbor life. While large volumes of water can be found throughout the Solar System, only Earth sustains liquid surface water. About 71% of Earth's surfa ...
Timeline of close approaches less than one lunar distance from Earth in 2012
A list of knownnear-Earth asteroid
A near-Earth object (NEO) is any small Solar System body whose orbit brings it into proximity with Earth. By convention, a Solar System body is a NEO if its closest approach to the Sun (perihelion) is less than 1.3 astronomical units (AU). ...
close approaches less than 1 lunar distance (384,400 km or 0.00256 AU) from Earth in 2012.For a list of current Earth close approaches seNEO Earth Close Approaches
/ref> This list does not include any of the objects that collided with earth in 2012, none of which were discovered in advance, but were recorded by sensors designed to detect detonation of nuclear devices.
Warning Times by Size
This sub-section visualises the warning times of the close approaches listed in the above table, depending on the size of the asteroid. The sizes of the charts show the relative sizes of the asteroids to scale. For comparison, the approximate size of a person is also shown. This is based theabsolute magnitude
Absolute magnitude () is a measure of the luminosity of a celestial object on an inverse Logarithmic scale, logarithmic Magnitude (astronomy), astronomical magnitude scale. An object's absolute magnitude is defined to be equal to the apparent mag ...
of each asteroid, an approximate measure of size based on brightness.
Abs Magnitude 30 and greater
(size of a person for comparison)
Abs Magnitude 29-30
Absolute Magnitude 28-29
Absolute Magnitude 27-28
Absolute Magnitude 26-27
Absolute Magnitude 25-26
Absolute Magnitude less than 25 (largest)
Notes
See also
*List of asteroid close approaches to Earth
This is a list of examples where an asteroid or meteoroid travels close to the Earth. Some are regarded as potentially hazardous objects if they are estimated to be large enough to cause regional devastation.
Near-Earth object detection technol ...
*List of asteroid close approaches to Earth in 2011
Below is the list of asteroid close approaches to Earth in 2011.
Timeline of close approaches less than one lunar distance from Earth in 2011
A list of known near-Earth asteroid close approaches less than 1 lunar distance (384,400 km or 0.002 ...
*List of asteroid close approaches to Earth in 2013
Below is the list of asteroid close approaches to Earth in 2013. This was the year of the Chelyabinsk impact, in addition to the other NEO flybys
Timeline of known close approaches less than one lunar distance from Earth in 2013
A list of know ...
References
{{2012 in space close approaches to Earth in 2012 Near-Earth asteroids