List of asteroid close approaches to Earth in 2013


Asteroids which came closer to Earth than the Moon in 2013 by time of discovery


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 close approaches less than 1 lunar distance from Earth in 2013, based on the close approach database of the Center for Near-Earth Object Studies.
The CNEOS database of close approaches lists some close approaches a full orbit or more before the discovery of the object, derived by orbit calculation. The list below only includes close approaches that are evidenced by observations, thus the pre-discovery close approaches would only be included if the object was found by precovery, but there was no such close approach in 2013.
This list and relevant databases do not consider impacts as close approaches, thus the list does not include any of the 24 objects that collided with Earth's atmosphere in 2013, none of which were discovered in advance, but were observed visually or 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, estimated at 20 m in diameter, which injured around 1500 people and damaged over 7000 buildings.
Date of
closest
approach		Date
discovered		ObjectNominal geocentric
distance 		Nominal geocentric
distance 		Size

Closer
approach
to Moon		Refs
2013-01-152013-01-207.3–1627.8Yes
2013-01-282013-02-012013 CY6.1–1428.2
2013-02-052013-02-066.4–1428.1
2013-02-112013-02-145.6–1228.4Yes
2013-02-152012-02-23367943 Duende39–8624.2
2013-03-042013-03-022013 EC7.3–1627.8
2013-03-092013-03-074.2–9.429.0
2013-04-182013-04-194.5–1028.9
2013-06-082013-06-067.3–1627.8
2013-08-042013-08-0432–7124.6
2013-08-092013-08-079.7–2227.2
2013-09-032013-09-022013 RG3.5–7.829.4
2013-09-042013-09-055.6–1228.4
2013-09-052013-09-034.8-1128.7
2013-09-182013-09-131.6–3.631.1
2013-10-042013-10-055.1–1128.6
2013-10-092013-10-1012–2726.7Yes
2013-10-212013-10-237–1627.9Yes
2013-10-252013-10-243.8–8.629.2
2013-10-292013-10-2512–2626.8Yes
2013-11-082013-11-097–1627.9Yes
2013-11-292013-11-283.2–7.129.6
2013-12-112013-12-123.5–7.829.4
2013-12-232013-12-232013 YB1.4–3.131.4

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 of each asteroid, an approximate measure of size based on brightness.
Absolute magnitude 30 and greater

Absolute magnitude 30 > H ≥ 29
Absolute magnitude 29 > H ≥ 28
Absolute magnitude 28 > H ≥ 27
Absolute magnitude 27 > H ≥ 26
Absolute magnitude 26 > H ≥ 25
None
'''Absolute magnitude 25 > H '''

Additional examples

An example list of near-Earth asteroids that passed more than 1 lunar distance from Earth in 2013.