# List of asteroid close approaches to Earth in 2010

Below is the list of asteroid close approaches to Earth in 2010.

## Timeline of close approaches less than one lunar distance from Earth in 2010

A list of known near-Earth asteroid close approaches less than 1 lunar distance (384,400 km or 0.00257 AU) from Earth in 2010, 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 2010.
This list and the relevant databases do not consider impacts as close approaches, thus this list does not include any of the objects that collided with Earth's atmosphere in 2010, 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) (approximate) | (H) (abs. mag.) | Closer approach to Moon | Refs |
| 2010-01-13 | 2010-01-10 | 2010 AL30 | 0.000862 AU (129,000 km; 80,100 mi) | 0.34 | 9.7-22 | 27.2 | | data · 2010 AL$_{30}$ |
| 2010-02-17 | 2010-02-14 | 2010 CK$_{19}$ | 0.00233 AU (349,000 km; 217,000 mi) | 0.91 | 7-16 | 27.9 | | data · 2010 CK$_{19}$ |
| 2010-04-18 | 2010-04-20 | 2010 HP$_{20}$ | 0.00160 AU (239,000 km; 149,000 mi) | 0.62 | 8.3–19 | 27.5 | | data · 2010 HP$_{20}$ |
| 2010-05-23 | 2010-05-20 | 2010 KO$_{10}$ | 0.00116 AU (174,000 km; 108,000 mi) | 0.45 | 10-23 | 27.1 | | data · 2010 KO$_{10}$ |
| 2010-05-26 | 2010-05-24 | 2010 KV$_{39}$ | 0.00167 AU (250,000 km; 155,000 mi) | 0.65 | 12-26 | 26.8 | | data · 2010 KV$_{39}$ |
| 2010-09-08 | 2010-09-05 | 2010 RX30 | 0.00166 AU (248,000 km; 154,000 mi) | 0.64 | 10-23 | 27.1 | | data · 2010 RX$_{30}$ |
| 2010-09-08 | 2010-09-05 | 2010 RF12 | 0.000531 AU (79,400 km; 49,400 mi) | 0.21 | 5.5-12 | 28.4 | | data · 2010 RF$_{12}$ |
| 2010-09-08 | 2010-09-10 | 2010 RK$_{53}$ | 0.000482 AU (72,100 km; 44,800 mi) | 0.19 | 7-16 | 27.9 | | data · 2010 RK$_{53}$ |
| 2010-09-30 | 2010-09-28 | 2010 SK$_{13}$ | 0.00178 AU (266,000 km; 165,000 mi) | 0.69 | 8.8-20 | 27.4 | | data · 2010 SK$_{13}$ |
| 2010-10-09 | 2010-10-11 | 2010 TW$_{54}$ | 0.00108 AU (162,000 km; 100,000 mi) | 0.42 | 8-18 | 27.6 | | data · 2010 TW$_{54}$ |
| 2010-10-11 | 2010-10-13 | 2010 TN$_{55}$ | 0.00219 AU (328,000 km; 204,000 mi) | 0.85 | 11-25 | 26.9 | Yes | data · 2010 TN$_{55}$ |
| 2010-10-12 | 2010-10-09 | 2010 TD54 | 0.000346 AU (51,800 km; 32,200 mi) | 0.13 | 4.4-9.9 | 28.9 | | data · 2010 TD$_{54}$ |
| 2010-10-16 | 2010-10-17 | 2010 UE | 0.000763 AU (114,100 km; 70,900 mi) | 0.30 | 3-7 | 29.6 | | data · 2010 UE |
| 2010-10-17 | 2010-10-12 | 2010 TE$_{55}$ | 0.00245 AU (367,000 km; 228,000 mi) | 0.95 | 6.7-15 | 28.0 | Yes | data · 2010 TE$_{55}$ |
| 2010-10-26 | 2010-10-30 | 2010 UY$_7$ | 0.00163 AU (244,000 km; 152,000 mi) | 0.63 | 5.3-12 | 28.5 | Yes | data · 2010 UY$_7$ |
| 2010-11-02 | 2010-10-29 | 2010 UJ$_7$ | 0.00191 AU (286,000 km; 178,000 mi) | 0.74 | 22-49 | 25.4 | | data · 2010 UJ$_7$ |
| 2010-11-02 | 2010-11-03 | 2010 VN$_1$ | 0.000866 AU (129,600 km; 80,500 mi) | 0.34 | 5.8-13 | 28.3 | | data · 2010 VN$_1$ |
| 2010-11-07 | 2010-11-06 | 2010 VR$_{21}$ | 0.00238 AU (356,000 km; 221,000 mi) | 0.92 | 3.8-8.4 | 29.3 | | data · 2010 VR$_{21}$ |
| 2010-11-12 | 2010-11-14 | 2010 VP$_{139}$ | 0.000537 AU (80,300 km; 49,900 mi) | 0.21 | 3.8-8.6 | 29.2 | | data · 2010 VP$_{139}$ |
| 2010-11-13 | 2010-11-15 | 2010 VC$_{140}$ | 0.00194 AU (290,000 km; 180,000 mi) | 0.75 | 7-16 | 27.9 | | data · 2010 VC$_{140}$ |
| 2010-11-17 | 2010-11-16 | 2010 WA | 0.000260 AU (38,900 km; 24,200 mi) | 0.10 | 2.7-5.9 | 30.0 | | data · 2010 WA |
| 2010-11-29 | 2010-12-02 | 2010 XR | 0.00129 AU (193,000 km; 120,000 mi) | 0.50 | 11-25 | 26.9 | | data · 2010 XR |
| 2010-11-30 | 2010-12-01 | 2010 XB | 0.000352 AU (52,700 km; 32,700 mi) | 0.14 | 3.2-7.1 | 29.6 | | data · 2010 XB |

### 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: 0 (0.0%)
* < 24 hours before: 0 (0.0%)
* up to 7 days before: 1 (100.0%)
* > one week before: 0 (0.0%)
* > 7 weeks before: 0 (0.0%)
* > one year before: 0 (0.0%)
Absolute magnitude 25 > H (largest)
None