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 known

Near-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 2013.For a list of current Earth close approaches se
NEO Earth Close Approaches
/ref> This list does not include any of the 24 objects that collided with earth in 2013, none of which were discovered in advance, but were recorded by sensors designed to detect detonation of nuclear devices. Of the 24 objects so detected, 5 had an impact energy greater than that of a 1 kiloton device including the 440 kiloton

Chelyabinsk meteor The Chelyabinsk meteor was a superbolide that entered Earth's atmosphere over the southern Ural (region), Ural region in Russia on 15 February 2013 at about 09:20 Yekaterinburg Time, YEKT (03:20 Coordinated Universal Time, UTC). It was caused ...

, estimated at 20 m in diameter, which injured around 1500 people and damaged over 7000 buildings.

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 the

absolute 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 Silhouette of man standing and facing forward

(size of a person for comparison) Abs Magnitude 29-30 Absolute Magnitude 28-29 Absolute Magnitude 27-28 Absolute Magnitude 26-27 (probable size of the

) Absolute Magnitude less than 25 (largest)

Notes

Additional examples

An example list of near-Earth asteroids that passed more than 1 lunar distance (384,400 km or 0.00256 AU) from Earth in 2013. *, December 18, 2013 (1.9 LD) *, December 11, 2013 (2 LD) *

3361 Orpheus 3361 Orpheus (1982 HR) is an Apollo asteroid that was discovered on 24 April 1982 by Carlos Torres at Cerro El Roble Astronomical Station. Its eccentric orbit crosses that of Mars and Earth, and approaches Venus as well. From 1900 to 2100 it pa ...

, December 7, 2013 (40.1 LD) *, November 18, 2013 (3 LD) *, August 24, 2013 *, August 8, 2013Radar Images of Asteroid 2005 WK4
/ref> *, July 30, 2013 *, July 26, 2013
/ref> *, June 4, 2013 *, May 29, 2013 *, May 23, 2013 *, March 20, 2013 *, March 9, 2013

References

External links