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

Time of discovery of asteroids which came closer to Earth than the Moon in 2013

After closest approach: 12 (50.0%)< 24 hours before: 2 (8.3%)up to 7 days before: 9 (37.5%)> one week before: 0 (0.0%)> 7 weeks before: 1 (4.2%)> one year before: 0 (0.0%)

  •   After closest approach: 12 (50.0%)
  •   < 24 hours before: 2 (8.3%)
  •   up to 7 days before: 9 (37.5%)
  •   > one week before: 0 (0.0%)
  •   > 7 weeks before: 1 (4.2%)
  •   > one year before: 0 (0.0%)

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 (384,400 km or 0.00256 AU) from Earth in 2013.[note 1]

  Rows highlighted red indicate objects which were not discovered until after closest approach

  Rows highlighted yellow indicate objects discovered less than 24 hours before closest approach

  Rows highlighted green indicate objects discovered more than one week before closest approach

  Rows highlighted turquoise indicate objects discovered more than 7 weeks before closest approach

  Rows highlighted blue indicate objects discovered more than one year before closest approach (i.e.
objects successfully cataloged on a previous orbit, rather than being detected during final approach)

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, estimated at 20 m in diameter, which injured around 1500 people and damaged over 7000 buildings. [1][2][3]

Date of
closest
approach		 Date
discovered		 Object Nominal geocentric
distance (AU)[note 2]		 Nominal geocentric
distance (LD)		 Size (m)
(approximate)		 (H)
(abs. mag)		 Closer
approach
to Moon		 Refs[4][5]
2013-01-152013-01-202013 BR270.00145 AU (217,000 km; 135,000 mi)167-1627.8[6]Yesdata · 2013 BR27
2013-01-282013-02-012013 CY0.00230 AU (344,000 km; 214,000 mi)136-1328.3[7]data · 2013 CY
2013-02-052013-02-062013 CY320.00070 AU (105,000 km; 65,000 mi)146-1428.1[8]data · 2013 CY32
2013-02-112013-02-142013 CL1290.00185 AU (277,000 km; 172,000 mi)125-1228.4[9]Yesdata · 2013 CL129
2013-02-152012-02-23367943 Duende0.0002276 AU (34,050 km; 21,160 mi)3042-9424.0[10]data · 2012 DA14
2013-03-042013-03-022013 EC0.00245 AU (367,000 km; 228,000 mi)167-1627.8[11]data · 2013 EC
2013-03-092013-03-072013 EC200.001003 AU (150,000 km; 93,200 mi)94-1029.0[12]data · 2013 EC20
2013-04-182013-04-192013 HT250.00036 AU (54,000 km; 33,000 mi)104-1028.8[13]data · 2013 HT25
2013-06-082013-06-062013 LR60.000742 AU (111,000 km; 69,000 mi)167-1627.8[14]data · 2013 LR6
2013-08-042013-08-042013 PJ100.00248 AU (371,000 km; 231,000 mi)6032-7124.6[15]data · 2013 PJ10
2013-08-092013-08-072013 PS130.00136 AU (203,000 km; 126,000 mi)2110-2227.2[16]data · 2013 PS13
2013-09-032013-09-022013 RG0.00151 AU (226,000 km; 140,000 mi)73-829.4[17]data · 2013 RG
2013-09-042013-09-052013 RO300.00194 AU (290,000 km; 180,000 mi)125-1228.4[18]data · 2013 RO30
2013-09-052013-09-032013 RF320.00112 AU (168,000 km; 104,000 mi)105-1128.7[19]data · 2013 RF32
2013-09-182013-09-132013 RZ530.00162 AU (242,000 km; 151,000 mi)32-431.1[20]data · 2013 RZ53
2013-10-042013-10-052013 TR120.00143 AU (214,000 km; 133,000 mi)115-1228.5[21]data · 2013 TR12
2013-10-092013-10-102013 TL1270.00251 AU (375,000 km; 233,000 mi)2712-2726.7[22]Yesdata · 2013 TL127
2013-10-212013-10-232013 UR10.00168 AU (251,000 km; 156,000 mi)177-1627.6[23]Yesdata · 2013 UR1
2013-10-252013-10-242013 UX20.00100 AU (150,000 km; 93,000 mi)84-929.2[24]data · 2013 UX2
2013-10-292013-10-252013 UV30.00189 AU (283,000 km; 176,000 mi)2512-2626.8[25]Yesdata · 2013 UV3
2013-11-082013-11-092013 VJ110.002283 AU (341,500 km; 212,200 mi)167-1627.8[26]Yesdata · 2013 VJ11
2013-11-292013-11-282013 WH250.0009 AU (130,000 km; 84,000 mi)73-729.6[27]data · 2013 WH25
2013-12-112013-12-122013 XS210.000484 AU (72,400 km; 45,000 mi)73-829.4[28]data · 2013 XS21
2013-12-232013-12-232013 YB0.00018 AU (27,000 km; 17,000 mi)31-331.4[29]data · 2013 YB

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.

Abs Magnitude 30 and greater

Silhouette of man standing and facing forward

(size of a person for comparison)

After closest approach: 0 (0.0%)< 24 hours before: 1 (50.0%)up to 7 days before: 1 (50.0%)> one week before: 0 (0.0%)> 7 weeks before: 0 (0.0%)> one year before: 0 (0.0%)

Abs Magnitude 29-30

After closest approach: 1 (20.0%)< 24 hours before: 1 (20.0%)up to 7 days before: 3 (60.0%)> one week before: 0 (0.0%)> 7 weeks before: 0 (0.0%)> one year before: 0 (0.0%)

Absolute Magnitude 28-29

After closest approach: 6 (85.7%)< 24 hours before: 0 (0.0%)up to 7 days before: 1 (14.3%)> one week before: 0 (0.0%)> 7 weeks before: 0 (0.0%)> one year before: 0 (0.0%)

Absolute Magnitude 27-28

After closest approach: 3 (50.0%)< 24 hours before: 0 (0.0%)up to 7 days before: 3 (50.0%)> one week before: 0 (0.0%)> 7 weeks before: 0 (0.0%)> one year before: 0 (0.0%)

Absolute Magnitude 26-27

(probable size of the Chelyabinsk meteor)

After closest approach: 1 (50.0%)< 24 hours before: 0 (0.0%)up to 7 days before: 1 (50.0%)> one week before: 0 (0.0%)> 7 weeks before: 0 (0.0%)> one year before: 0 (0.0%)

Absolute Magnitude less than 25 (largest)

After closest approach: 1 (50.0%)< 24 hours before: 0 (0.0%)up to 7 days before: 0 (0.0%)> one week before: 0 (0.0%)> 7 weeks before: 1 (50.0%)> one year before: 0 (0.0%)

  •   After closest approach: 1 (50.0%)
  •   < 24 hours before: 0 (0.0%)
  •   up to 7 days before: 0 (0.0%)
  •   > one week before: 0 (0.0%)
  •   > 7 weeks before: 1 (50.0%)
  •   > one year before: 0 (0.0%)

Notes
  1. For a list of current Earth close approaches see NEO Earth Close Approaches
  2. Distance from the center of Earth to the center of the object. See the NASA/JPL Solar System Dynamics Glossary: Geocentric. Earth has a radius of approximately 6,400 km.

Additional examples
Radar imaging of 2013 ET during its approach in March 2013.[30]
2005 WK4 in August 2013

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.

Plot of orbits of known potentially hazardous asteroids (size over 460 feet (140 m) and passing within 4.7 million miles (7.6×10^6 km) of Earth's orbit) as of early 2013 (alternate image).

See also

References
  1. https://cneos.jpl.nasa.gov/fireballs/
  2. Число пострадавших при падении метеорита приблизилось к 1500 [The number of victims of the meteorite approached 1500] (in Russian). РосБизнесКонсалтинг [RBC]. 18 February 2013. Archived from the original on 2 May 2013. Retrieved 25 July 2018.
  3. "Meteorite-caused emergency situation regime over in Chelyabinsk region". Russia Beyond The Headlines. Rossiyskaya Gazeta. Interfax. 5 March 2013.
  4. "JPL Small-Body Database Browser". JPL Solar System Dynamics. NASA Jet Propulsion Laboratory.
  5. "MPC Database". IAU Minor Planet Center. International Astronomical Union. Retrieved 1 January 2021.
  6. "JPL Small-Body Database Browser: (2013 BR27)" (last observation: 2013-02-01).
  7. "JPL Small-Body Database Browser: (2013 CY)" (last observation: 2013-03-14).
  8. "JPL Small-Body Database Browser: (2013 CY32)" (last observation: 2013-02-07).
  9. "JPL Small-Body Database Browser: (2013 CL129)" (last observation: 2013-02-15).
  10. "JPL Small-Body Database Browser: 367943 Duende (2012 DA14)" (last observation: 2013-02-21).
  11. "JPL Small-Body Database Browser: (2013 EC)" (last observation: 2013-03-03).
  12. "JPL Small-Body Database Browser: (2013 EC20)" (last observation: 2013-03-13).
  13. "JPL Small-Body Database Browser: (2013 HT25)" (last observation: 2013-04-20).
  14. "JPL Small-Body Database Browser: (2013 LR6)" (last observation: 2013-06-07).
  15. "JPL Small-Body Database Browser: (2013 PJ10)" (last observation: 2013-09-09).
  16. "JPL Small-Body Database Browser: (2013 PS13)" (last observation: 2013-08-09).
  17. "JPL Small-Body Database Browser: (2013 RG)" (last observation: 2013-09-03).
  18. "JPL Small-Body Database Browser: (2013 RO30)" (last observation: 2013-09-07).
  19. "JPL Small-Body Database Browser: (2013 RF32)" (last observation: 2013-09-04).
  20. "JPL Small-Body Database Browser: (2013 RZ53)" (last observation: 2013-09-16).
  21. "JPL Small-Body Database Browser: (2013 TR12)" (last observation: 2013-10-07).
  22. "JPL Small-Body Database Browser: (2013 TL127)" (last observation: 2013-10-12).
  23. "JPL Small-Body Database Browser: (2013 UR1)" (last observation: 2013-10-30).
  24. "JPL Small-Body Database Browser: (2013 UX2)" (last observation:2013-10-25).
  25. "JPL Small-Body Database Browser: (2013 UV3)" (last observation: 2013-10-29).
  26. "JPL Small-Body Database Browser: (2013 VJ11)" (last observation: 2013-11-11).
  27. "JPL Small-Body Database Browser: (2013 WH25)" (last observation: 2013-11-28).
  28. "JPL Small-Body Database Browser: (2013 XS21)" (last observation: 2013-12-14).
  29. "JPL Small-Body Database Browser: (2013 YB)" (last observation: 2013-12-23).
  30. "ASTEROID RADAR RESEARCH". Archived from the original on 2007-12-07. Retrieved 2013-07-29.
  31. Radar Images of Asteroid 2005 WK4
  32. Astrowatch.net - June 2, 2013
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