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List of asteroid close approaches to Earth in 2015

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Time of discovery of asteroids which came closer to Earth than the Moon in 2015
After closest approach: 17 (63.0%)< 24 hours before: 3 (11.1%)up to 7 days before: 6 (22.2%)> one week before: 1 (3.7%)> 7 weeks before: 0 (0.0%)> one year before: 0 (0.0%)
  •   After closest approach: 17 (63.0%)
  •   < 24 hours before: 3 (11.1%)
  •   up to 7 days before: 6 (22.2%)
  •   > one week before: 1 (3.7%)
  •   > 7 weeks before: 0 (0.0%)
  •   > one year before: 0 (0.0%)
Other Years
2013, 2014, 2015, 2016, 2017

Below is the list of asteroid close approaches to Earth in 2015.

Timeline of known close approaches less than one lunar distance from Earth in 2015

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A list of known near-Earth asteroid close approaches less than 1 lunar distance (384,400 km or 0.00256 AU) from Earth in 2015.[note 1]

Note this data does not include any of the 43 objects that collided with earth in 2015, none of which were discovered in advance, but were recorded by sensors designed to detect detonation of nuclear devices (of the 43 objects detected, 2 had an impact energy greater than that of a 1 kiloton device).[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)

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[2][3]
2015-01-14 2015-01-15 2015 AQ43 0.00105 AU (157,000 km; 98,000 mi) 0.41 6–13 28.1[4] data · 2015 AQ43
2015-01-18 2015-01-27 2015 BP513 0.00160 AU (239,000 km; 149,000 mi) 0.62 12–27 26.7[5] Yes data · 2015 BP513
2015-01-20 2015-01-21 2015 BE511 0.00108 AU (162,000 km; 100,000 mi) 0.42 4–9 28.9[6] data · 2015 BE511
2015-02-11 2015-02-12 2015 CH13 0.00189 AU (283,000 km; 176,000 mi) 0.73 5–11 28.5[7] data · 2015 CH13
2015-02-17 2015-02-18 2015 DD1 0.000262 AU (39,200 km; 24,400 mi) 0.10 2–5 30.4[8] data · 2015 DD1
2015-02-18 2015-02-19 2015 DQ224 0.000723 AU (108,200 km; 67,200 mi) 0.30 3–9 29.3[9] data · 2015 DQ224
2015-03-10 2015-03-11 2015 ET 0.000835 AU (124,900 km; 77,600 mi) 0.32 10–32 26.7[10] data · 2015 ET
2015-03-12 2015-03-11 2015 EO6 0.000732 AU (109,500 km; 68,000 mi) 0.28 2–9 30.2[11] data · 2015 EO6
2015-03-16 2015-03-17 2015 FU344 0.00255 AU (381,000 km; 237,000 mi) 0.99 2–4 31.0[12] data · 2015 FU344
2015-03-28 2015-03-25 2015 FM118 0.00238 AU (356,000 km; 221,000 mi) 0.92 4–11 28.7[13] data · 2015 FM118
2015-04-12 2015-04-11 2015 GU 0.000739 AU (110,600 km; 68,700 mi) 0.29 5–11 28.4[14] data · 2015 GU
2015-04-14 2015-04-16 2015 HG182 0.00220 AU (329,000 km; 205,000 mi) 0.86 4–11 28.9[15] Yes data · 2015 HG182
2015-04-16 2015-04-15 2015 GL13 0.00124 AU (186,000 km; 115,000 mi) 0.48 4–9 28.8[16] Yes data · 2015 GL13
2015-04-21 2015-04-18 2015 HD1 0.000395 AU (59,100 km; 36,700 mi) 0.15 8–19 27.4[17] data · 2015 HD1
2015-05-15 2015-05-12 2015 JF1 0.00208 AU (311,000 km; 193,000 mi) 0.81 6–13 28.1[18] Yes data · 2015 JF1
2015-05-23 2015-05-25 2015 KW121 0.00191 AU (286,000 km; 178,000 mi) 0.74 12–40 26.1[19] data · 2015 KW121
2015-06-08 2015-06-07 2015 LF 0.00132 AU (197,000 km; 123,000 mi) 0.51 10–35 26.6[20] data · 2015 LF
2015-08-06 2015-08-07 2015 PK 0.000531 AU (79,400 km; 49,400 mi) 0.21 5–15 28.1[21] data · 2015 PK
2015-09-22 2015-09-24 2015 SK7 0.000178 AU (26,600 km; 16,500 mi) 0.069 3–14 28.9[22] data · 2015 SK7
2015-10-13 2015-10-11 2015 TC25 0.000741 AU (110,900 km; 68,900 mi) 0.29 2[23] 29.5[24] data · 2015 TC25
2015-10-22 2015-10-24 2015 UM52 0.000871 AU (130,300 km; 81,000 mi) 0.34 7–16 27.8[25] data · 2015 UM52
2015-11-05 2015-11-07 2015 VP64 0.00187 AU (280,000 km; 174,000 mi) 0.73 5–13 28.3[26] Yes data · 2015 VP64
2015-11-06 2015-11-08 2015 VU64 0.000671 AU (100,400 km; 62,400 mi) 0.26 2–4 30.6[27] data · 2015 VU64
2015-11-15 2015-11-14 2015 VY105 0.000231 AU (34,600 km; 21,500 mi) 0.090 4–9 29.0[28] data · 2015 VY105
2015-11-20 2015-11-21 2015 WP2 0.00153 AU (229,000 km; 142,000 mi) 0.60 1–5 30.1[29] Yes data · 2015 WP2
2015-12-13 2015-12-16 2015 YJ 0.000477 AU (71,400 km; 44,300 mi) 0.19 5–18 28.0[30] data · 2015 YJ
2015-12-15 2015-12-06 2015 XY261 0.00193 AU (289,000 km; 179,000 mi) 0.75 8–25 27.1[31] data · 2015 XY261

Warning Times by Size

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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
Silhouette of man standing and facing forward

(size of a person for comparison)

After closest approach: 4 (80.0%)< 24 hours before: 1 (20.0%)up to 7 days before: 0 (0.0%)> 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 (33.3%)< 24 hours before: 1 (33.3%)up to 7 days before: 1 (33.3%)> 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: 8 (66.7%)< 24 hours before: 1 (8.3%)up to 7 days before: 3 (25.0%)> 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: 1 (33.3%)< 24 hours before: 0 (0.0%)up to 7 days before: 1 (33.3%)> one week before: 1 (33.3%)> 7 weeks before: 0 (0.0%)> one year before: 0 (0.0%)

Absolute Magnitude 26-27

After closest approach: 3 (75.0%)< 24 hours before: 0 (0.0%)up to 7 days before: 1 (25.0%)> one week before: 0 (0.0%)> 7 weeks before: 0 (0.0%)> one year before: 0 (0.0%)
  •   After closest approach: 3 (75.0%)
  •   < 24 hours before: 0 (0.0%)
  •   up to 7 days before: 1 (25.0%)
  •   > one week before: 0 (0.0%)
  •   > 7 weeks before: 0 (0.0%)
  •   > one year before: 0 (0.0%)

Notes

[edit]
  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

[edit]
2015 TB145 was radar imaged in late October 2015

An example list of near-Earth asteroids that passed more than 1 lunar distance (384,400 km or 0.00256 AU) from Earth in 2015.

  • 2015 AK1 (~50 meters in diameter) passed 5.57 lunar distances from Earth on 18 January 2015.[32]
  • 2015 BC (~60 meters in diameter) passed 1.64 lunar distances from Earth (1.50 lunar distances from the Moon) on 20 January 2015.[33]
  • (357439) 2004 BL86 (~700 meters in diameter) passed 3.1 lunar distances (1.2 million km) from Earth on 26 January 2015.
  • 2015 AZ43 (~70 meters in diameter) passed 0.0197 AU (2,950,000 km; 1,830,000 mi) from Earth on 15 February 2015.
  • 2014 YB35 (~500 meters in diameter) passed 11.7 lunar distances (4 million km) from Earth on 2015 Mar 27.
  • 2015 FW117 (~110 meters in diameter) passed 3.6 lunar distances (1.38 million km) (3.2 lunar distances from the Moon) (1.21 million km) on 1 April 2015.
  • 2015 HM10 (~80 meters in diameter) passed 1.15 lunar distances (440,000 km) (1.08 lunar distances from the Moon) (410,000 km) on 7 July 2015.
  • 2015 TQ21 (~15 meters in diameter) passed 1.005 lunar distances (390,000 km) on 7 October 2015
  • 2014 UR (~20 meters in diameter) passed 3.81 lunar distances (1.46 million km) from Earth on 18 October 2015.
  • 2015 TB145 (~600 meters in diameter) passed 1.3 lunar distances (480,000 km) (0.74 lunar distances from the Moon) (286,000 km) on 31 October 2015.
  • 2015 VO142 (~6 meters in diameter) passed 1.02 lunar distances (393,000 km) (0.85 lunar distances from the Moon) (327,000 km) on 24 November 2015
  • Risk-listed asteroid 2007 VE191 (~60 meters in diameter) was not observed when it probably passed roughly 0.5 AU (75,000,000 km; 46,000,000 mi) from Earth on 27 November 2015.
  • 2015 YB initially calculated to make a close approach to Earth on 19 December 2015 turned out to be a much further away inner main-belt asteroid. On 31 December 2015 the asteroid received the designation 2015 YU9.

Timeline of close approaches less than one Lunar distance from the Moon in 2015

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The number of asteroids listed here are significantly less than those of asteroids approaching Earth for several reasons:

  • Asteroids approaching Earth not only move faster, but are brighter and are easier to detect with modern surveys due to these factors
  • Asteroids approaching closer to Earth are higher priority to confirm, and only confirmed asteroids are listed with a lunocentric approach distance
  • Those which make close approaches to the Moon are frequently lost in its glare, making them harder to confirm, and are more easily discovered during the new Moon, when the Moon is too close to the Sun for any asteroids to be detected while they are near to the Moon anyway.

These factors combined severely limit the amount of Moon-approaching asteroids, to a level many times lower than the detected asteroids to pass just as close to Earth instead.

Date of
closest
approach 		Object Nominal lunocentric
distance (AU)[note2 1] 		Nominal lunocentric
distance (LD) 		Size (m)
(approximate) 		(H)
approach
distance
to Earth
(LD)
2015-01-12 2015 BY3 0.00212 AU (317,000 km; 197,000 mi) 0.82 7–22 27.5[34] 1.43
2015-01-18 2015 BP513 0.000824 AU (123,300 km; 76,600 mi) 0.32 10–31 26.7[5] 0.62
2015-02-16 2015 DD1 0.00179 AU (268,000 km; 166,000 mi) 0.69 2–5 30.4[8] 0.10
2015-02-17 2015 DQ224 0.00166 AU (248,000 km; 154,000 mi) 0.65 3–9 29.3[9] 0.30
2015-03-10 2015 ET 0.00146 AU (218,000 km; 136,000 mi) 0.57 10–32 26.7[10] 0.32
2015-04-12 2015 GU 0.00159 AU (238,000 km; 148,000 mi) 0.62 5–11 28.4[14] 0.29
2015-04-14 2015 HG182 0.00103 AU (154,000 km; 96,000 mi) 0.40 4–11 28.9[15] 0.86
2015-04-16 2015 GL13 0.00112 AU (168,000 km; 104,000 mi) 0.44 4–9 28.8[16] 0.48
2015-04-21 2015 HD1 0.00186 AU (278,000 km; 173,000 mi) 0.72 8–19 27.4[17] 0.15
2015-05-15 2015 JF1 0.00196 AU (293,000 km; 182,000 mi) 0.76 6–13 28.1[18] 0.81
2015-07-24 2015 OQ21 0.00228 AU (341,000 km; 212,000 mi) 0.89 6–18 27.9[35] 1.48
2015-09-22 2015 SK7 0.00245 AU (367,000 km; 228,000 mi) 0.95 3–14 28.9[22] 0.069
2015-10-14 2015 TC25 0.00143 AU (214,000 km; 133,000 mi) 0.56 3–9 29.5[24] 0.29
2015-10-31 2015 TB145 0.00191 AU (286,000 km; 178,000 mi) 0.74 600 20.0[36] 1.27
2015-11-05 2015 VP64 0.000758 AU (113,400 km; 70,500 mi) 0.29 5–13 28.3[26] 0.73
2015-11-06 2015 VU64 0.00188 AU (281,000 km; 175,000 mi) 0.73 2–4 30.6[27] 0.26
2015-11-15 2015 VY105 0.00197 AU (295,000 km; 183,000 mi) 0.77 4–9 29.0[28] 0.090
2015-11-20 2015 WP2 0.00115 AU (172,000 km; 107,000 mi) 0.45 1–5 30.1[29] 0.60
2015-11-22 2015 VO142 0.00218 AU (326,000 km; 203,000 mi) 0.85 3–11 29.0[37] 1.02
2015-12-13 2015 YJ 0.000970 AU (145,100 km; 90,200 mi) 0.38 5–18 28.2[30] 0.19
2015-12-14 2015 XR169 0.00180 AU (269,000 km; 167,000 mi) 0.70 4–12 28.7[38] 1.32
2015-12-21 2015 YQ1 0.00165 AU (247,000 km; 153,000 mi) 0.64 5–17 28.0[39] 1.45

Notes

[edit]
  1. ^ Distance from the center of the Moon to the center of the object. the Moon has a radius of approximately 1,740 km.

See also

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References

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  1. ^ NASA.gov
  2. ^ "JPL Small-Body Database Browser". JPL Solar System Dynamics. NASA Jet Propulsion Laboratory.
  3. ^ "MPC Database". IAU Minor Planet Center. International Astronomical Union. Retrieved 1 January 2021.
  4. ^ "JPL Small-Body Database Browser: (2015 AQ43)" (last observation: 2015-01-23).
  5. ^ a b "JPL Small-Body Database Browser: (2015 BP513)" (last observation: 2015-01-29).
  6. ^ "JPL Small-Body Database Browser: (2015 BE511)" (last observation: 2015-01-28).
  7. ^ "JPL Small-Body Database Browser: (2015 CH13)" (last observation: 2015-02-14).
  8. ^ a b "JPL Small-Body Database Browser: (2015 DD1)" (last observation: 2015-02-25).
  9. ^ a b "JPL Small-Body Database Browser: (2015 DQ224)" (last observation: 2015-02-19).
  10. ^ a b "JPL Small-Body Database Browser: (2015 ET)" (last observation: 2015-03-25).
  11. ^ "JPL Small-Body Database Browser: (2015 EO6)" (last observation: 2015-03-11).
  12. ^ "JPL Small-Body Database Browser: (2015 FU344)" (last observation: 2015-03-18).
  13. ^ "JPL Small-Body Database Browser: (2015 FM118)" (last observation: 2015-03-28).
  14. ^ a b "JPL Small-Body Database Browser: (2015 GU)" (last observation: 2015-04-12).
  15. ^ a b "JPL Small-Body Database Browser: (2015 HG182)" (last observation: 2015-04-17).
  16. ^ a b "JPL Small-Body Database Browser: (2015 GL13)" (last observation: 2015-04-16).
  17. ^ a b "JPL Small-Body Database Browser: (2015 HD1)" (last observation: 2015-04-21).
  18. ^ a b "JPL Small-Body Database Browser: (2015 JF1)" (last observation: 2015-05-14).
  19. ^ "JPL Small-Body Database Browser: (2015 KW121)" (last observation: 2015-05-28).
  20. ^ "JPL Small-Body Database Browser: (2015 LF)" (last observation: 2015-06-08).
  21. ^ "JPL Small-Body Database Browser: (2015 PK)" (last observation: 2015-08-08).
  22. ^ a b "JPL Small-Body Database Browser: (2015 SK7)" (last observation: 2015-10-13).
  23. ^ Wall, Mike. "6-Foot Wide 'Bald' Asteroid Is Smallest Ever Studied". space.com. Retrieved 3 December 2016.
  24. ^ a b "JPL Small-Body Database Browser: (2015 TC25)" (last observation: 2015-10-18).
  25. ^ "JPL Small-Body Database Browser: (2015 UM52)" (last observation: 2015-10-25).
  26. ^ a b "JPL Small-Body Database Browser: (2015 VP64)" (last observation: 2015-11-08).
  27. ^ a b "JPL Small-Body Database Browser: (2015 VU64)" (last observation: 2015-11-10).
  28. ^ a b "JPL Small-Body Database Browser: (2015 VY105)" (last observation: 2015-11-15).
  29. ^ a b "JPL Small-Body Database Browser: (2015 WP2)" (last observation: 2015-11-23).
  30. ^ a b "JPL Small-Body Database Browser: (2015 YJ)" (last observation: 2015-12-18).
  31. ^ "JPL Small-Body Database Browser: (2015 XY261)" (last observation: 2015-12-13).
  32. ^ "JPL Small-Body Database Browser: (2015 AK1)" (last observation: 2015-01-16).
  33. ^ "JPL Small-Body Database Browser: (2015 BC)" (last observation: 2015-01-17).
  34. ^ "JPL Small-Body Database Browser: (2015 BY3)" (last observation: 2015-01-23).
  35. ^ "JPL Small-Body Database Browser: (2015 OQ21)" (last observation: 2015-07-25).
  36. ^ "JPL Small-Body Database Browser: (2015 TB145)" (last observation: 2015-11-01).
  37. ^ "JPL Small-Body Database Browser: (2015 VO142)" (last observation: 2015-11-22).
  38. ^ "JPL Small-Body Database Browser: (2015 XR169)" (last observation: 2015-12-13).
  39. ^ "JPL Small-Body Database Browser: (2015 YQ1)" (last observation: 2015-12-22).
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