# List of asteroid close approaches to Earth in 2014

Below is the list of asteroid close approaches to Earth in 2014.

## Timeline of known close approaches less than one lunar distance from Earth in 2014

A list of known near-Earth asteroid close approaches less than 1 lunar distance (384,400 km or 0.00257 AU) from Earth in 2014, based on the close approach database of the Center for Near-Earth Object Studies (CNEOS).
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 2014.
For reference, the radius of Earth is approximately 0.0000426 AU (6,370 km; 3,960 mi) or 0.0166 Lunar distances. The orbit of geosynchronous satellites, however, is 0.000282 AU (42,200 km; 26,200 mi) or 0.110 Lunar distances. This year, 3 asteroids were detected which traveled nearer than this, most notably 2014 AA, which impacted into Earth's atmosphere and burnt up. This list and relevant databases do not consider impacts as close approaches, thus this list does not include predicted asteroid impacts or any of the other 32 objects that collided with Earth's atmosphere in 2014, none of which were discovered in advance, but were observed visually or recorded by sensors designed to detect detonation of nuclear devices.
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) | Nominal geocentric distance (LD) | Size (m) (approx.) | (H) (abs. mag.) | Closer approach to Moon | Refs |
| 2014-01-01 | 2014-01-02 | 2014 AF5 | 0.000643 AU (96,200 km; 59,800 mi) | 0.25 | 4.6–10 | 28.8 | Yes | data · 2014 AF5 |
| 2014-01-08 | 2014-01-10 | 2014 AK$_{51}$ | 0.00247 AU (370,000 km; 230,000 mi) | 0.96 | 13–28 | 26.6 | Yes | data · 2014 AK51 |
| 2014-01-09 | 2014-01-10 | 2014 AG$_{51}$ | 0.000877 AU (131,200 km; 81,500 mi) | 0.34 | 2.8–6.2 | 29.9 | | data · 2014 AG51 |
| 2014-01-10 | 2014-01-10 | 2014 AW$_{32}$ | 0.00125 AU (187,000 km; 116,000 mi) | 0.49 | 8.4–19 | 27.5 | | data · 2014 AW32 |
| 2014-02-21 | 2014-02-22 | 2014 DK$_{10}$ | 0.00174 AU (260,000 km; 162,000 mi) | 0.68 | 7.7–17 | 27.7 | | data · 2014 DK10 |
| 2014-03-05 | 2014-02-28 | 2014 DX110 | 0.00233 AU (349,000 km; 217,000 mi) | 0.91 | 19–43 | 25.7 | | data · 2014 DX110 |
| 2014-03-06 | 2014-03-05 | 2014 EF | 0.00113 AU (169,000 km; 105,000 mi) | 0.44 | 4.4–9.9 | 28.9 | | data · 2014 EF |
| 2014-03-06 | 2014-03-05 | 2014 EC | 0.000412 AU (61,600 km; 38,300 mi) | 0.16 | 6.1–14 | 28.2 | | data · 2014 EC |
| 2014-03-09 | 2014-03-11 | 2014 EX$_{24}$ | 0.00176 AU (263,000 km; 164,000 mi) | 0.68 | 5.1–11 | 28.6 | Yes | data · 2014 EX24 |
| 2014-03-30 | 2014-04-04 | 2014 GY$_{44}$ | 0.00112 AU (168,000 km; 104,000 mi) | 0.44 | 22–49 | 25.4 | Yes | data · 2014 GY44 |
| 2014-04-03 | 2014-04-04 | 2014 GC$_{49}$ | 0.000759 AU (113,500 km; 70,600 mi) | 0.30 | 5.1–11 | 28.6 | | data · 2014 GC49 |
| 2014-05-03 | 2014-04-28 | 2014 HL$_{129}$ | 0.00195 AU (292,000 km; 181,000 mi) | 0.76 | 5.8–13 | 28.3 | | data · 2014 HL129 |
| 2014-05-07 | 2014-05-06 | 2014 JR$_{24}$ | 0.000714 AU (106,800 km; 66,400 mi) | 0.28 | 3.7–8.2 | 29.3 | | data · 2014 JR24 |
| 2014-05-10 | 2014-05-10 | 2014 JG$_{55}$ | 0.000676 AU (101,100 km; 62,800 mi) | 0.26 | 3.8–8.6 | 29.2 | | data · 2014 JG55 |
| 2014-05-26 | 2014-05-28 | 2014 KW$_{76}$ | 0.00230 AU (344,000 km; 214,000 mi) | 0.89 | 7–16 | 27.9 | | data · 2014 KW76 |
| 2014-05-28 | 2014-05-27 | 2014 KC$_{45}$ | 0.000590 AU (88,300 km; 54,800 mi) | 0.23 | 3.7–8.2 | 29.3 | | data · 2014 KC45 |
| 2014-06-03 | 2014-06-05 | 2014 LN$_{17}$ | 0.00143 AU (214,000 km; 133,000 mi) | 0.56 | 11–24 | 27 | | data · 2014 LN17 |
| 2014-06-03 | 2014-06-02 | 2014 LY21 | 0.000134 AU (20,000 km; 12,500 mi) | 0.05 | 4–9 | 29.1 | ? | data · 2014 LY21 |
| 2014-06-22 | 2014-06-24 | 2014 MH$_6$ | 0.00165 AU (247,000 km; 153,000 mi) | 0.64 | 10–23 | 27.1 | Yes | data · 2014 MH6 |
| 2014-07-24 | 2014-07-25 | 2014 OP$_2$ | 0.00133 AU (199,000 km; 124,000 mi) | 0.52 | 4–9 | 29.1 | | data · 2014 OP2 |
| 2014-07-25 | 2014-07-26 | 2014 OM$_{207}$ | 0.00180 AU (269,000 km; 167,000 mi) | 0.70 | 4–9 | 29.1 | | data · 2014 OM207 |
| 2014-08-31 | 2014-09-01 | 2014 RA | 0.000379 AU (56,700 km; 35,200 mi) | 0.15 | 4.4–9.9 | 28.9 | | data · 2014 RA |
| 2014-09-07 | 2014-09-01 | 2014 RC | 0.000267 AU (39,900 km; 24,800 mi) | 0.10 | 11–25 | 26.9 | | data · 2014 RC |
| 2014-09-20 | 2014-09-20 | 2014 SG$_1$ | 0.000532 AU (79,600 km; 49,500 mi) | 0.21 | 4–9 | 29.1 | | data · 2014 SG1 |
| 2014-10-01 | 2014-10-02 | 2014 TL | 0.000655 AU (98,000 km; 60,900 mi) | 0.26 | 7.3–16 | 27.8 | | data · 2014 TL |
| 2014-10-19 | 2014-10-24 | 2014 UU$_{56}$ | 0.00174 AU (260,000 km; 162,000 mi) | 0.68 | 5.1–11 | 28.6 | | data · 2014 UU56 |
| 2014-10-27 | 2014-10-25 | 2014 UF$_{56}$ | 0.00110 AU (165,000 km; 102,000 mi) | 0.43 | 8.8–20 | 27.4 | | data · 2014 UF56 |
| 2014-11-13 | 2014-11-17 | 2014 WE$_6$ | 0.00147 AU (220,000 km; 137,000 mi) | 0.57 | 2.2–4.9 | 30.4 | Yes | data · 2014 WE6 |
| 2014-11-15 | 2014-11-17 | 2014 WJ$_6$ | 0.00223 AU (334,000 km; 207,000 mi) | 0.87 | 10–23 | 27.1 | Yes | data · 2014 WJ6 |
| 2014-12-07 | 2014-11-24 | 2014 WX$_{202}$ | 0.00251 AU (375,000 km; 233,000 mi) | 0.98 | 3.2–7.1 | 29.6 | Yes | data · 2014 WX202 |
| 2014-12-26 | 2014-12-27 | 2014 YR$_{14}$ | 0.00234 AU (350,000 km; 218,000 mi) | 0.91 | 16–36 | 26.1 | | data · 2014 YR14 |

### 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 H ≥ 30 (smallest)
(size of a person for comparison)
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
* 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 25 > H (largest)
None