# List of asteroid close approaches to Earth in 2008

Below is the list of asteroid close approaches to Earth in 2008.

## Timeline of close approaches less than one lunar distance from Earth in 2008

A list of known near-Earth asteroid close approaches less than 1 lunar distance (384,400 km or 0.00257 AU) from Earth in 2008, 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 2008.
This list and the relevant databases do not consider impacts on Earth as close approaches. The impact of 2008 TC3 was the first successfully predicted asteroid impact, while the impact of several small asteroids in Earth's atmosphere were observed visually or recorded by sensors designed to detect the detonation of nuclear devices as bolides.
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 |
| 2008-01-13 | 2008-01-10 | 2008 AF$_3$ | 0.00252 AU (377,000 km; 234,000 mi) | 0.98 | 16–36 | 26.1 | | data · 2008 AF$_3$ |
| 2008-01-16 | 2008-01-19 | 2008 BW$_2$ | 0.00238 AU (356,000 km; 221,000 mi) | 0.93 | 3.1–6.8 | 29.7 | | data · 2008 BW$_2$ |
| 2008-01-31 | 2008-01-30 | 2008 BC$_{15}$ | 0.00198 AU (296,000 km; 184,000 mi) | 0.77 | 13–28 | 26.6 | Yes | data · 2008 BC$_{15}$ |
| 2008-02-05 | 2008-02-03 | 2008 CT$_1$ | 0.000887 AU (132,700 km; 82,500 mi) | 0.35 | 7.7–17 | 27.7 | | data · 2008 CT$_1$ |
| 2008-02-15 | 2008-02-09 | 2008 CK70 | 0.00248 AU (371,000 km; 231,000 mi) | 0.97 | 28–62 | 24.9 | | data · 2008 CK$_{70}$ |
| 2008-03-09 | 2008-03-07 | 2008 EZ$_7$ | 0.00108 AU (162,000 km; 100,000 mi) | 0.42 | 11–24 | 27.0 | | data · 2008 EZ$_7$ |
| 2008-03-10 | 2008-03-11 | 2008 EF$_{32}$ | 0.000442 AU (66,100 km; 41,100 mi) | 0.17 | 3.5–7.8 | 29.4 | | data · 2008 EF$_{32}$ |
| 2008-03-10 | 2008-03-08 | 2008 EM$_{68}$ | 0.00149 AU (223,000 km; 139,000 mi) | 0.58 | 8.4–19 | 27.5 | | data · 2008 EM$_{68}$ |
| 2008-03-23 | 2008-03-27 | 2008 FK | 0.00217 AU (325,000 km; 202,000 mi) | 0.84 | 9.2–21 | 27.3 | Yes | data · 2008 FK |
| 2008-03-29 | 2008-03-28 | 2008 FP | 0.00114 AU (171,000 km; 106,000 mi) | 0.44 | 15–33 | 26.3 | | data · 2008 FP |
| 2008-04-03 | 2008-04-06 | 2008 GM$_2$ | 0.00139 AU (208,000 km; 129,000 mi) | 0.54 | 5.8–13 | 28.3 | | data · 2008 GM$_2$ |
| 2008-04-07 | 2008-04-05 | 2008 GF$_1$ | 0.00196 AU (293,000 km; 182,000 mi) | 0.76 | 5.8–13 | 28.3 | Yes | data · 2008 GF$_1$ |
| 2008-05-10 | 2008-05-11 | 2008 JL$_{24}$ | 0.00115 AU (172,000 km; 107,000 mi) | 0.45 | 3.2–7.1 | 29.6 | Yes | data · 2008 JL$_{24}$ |
| 2008-07-29 | 2008-07-30 | 2008 OT$_7$ | 0.00116 AU (174,000 km; 108,000 mi) | 0.45 | 10–23 | 27.1 | | data · 2008 OT$_7$ |
| 2008-10-03 | 2008-10-08 | 2008 TN$_9$ | 0.00165 AU (247,000 km; 153,000 mi) | 0.64 | 7.3–16 | 27.8 | | data · 2008 TN$_9$ |
| 2008-10-09 | 2008-10-09 | 2008 TS26 | 0.0000845 AU (12,640 km; 7,850 mi) | 0.03 | 0.61–1.4 | 33.2 | | data · 2008 TS$_{26}$ |
| 2008-10-18 | 2008-10-29 | 2008 UA$_{202}$ | 0.00223 AU (334,000 km; 207,000 mi) | 0.87 | 3.5–7.8 | 29.4 | | data · 2008 UA$_{202}$ |
| 2008-10-20 | 2008-10-21 | 2008 US | 0.000220 AU (32,900 km; 20,500 mi) | 0.09 | 1.4–3.1 | 31.4 | | data · 2008 US |
| 2008-10-22 | 2008-10-22 | 2008 UM$_1$ | 0.000572 AU (85,600 km; 53,200 mi) | 0.22 | 1.0–2.3 | 32.1 | | data · 2008 UM$_1$ |
| 2008-11-03 | 2008-11-03 | 2008 VM | 0.000309 AU (46,200 km; 28,700 mi) | 0.12 | 2.4–5.4 | 30.2 | | data · 2008 VM |

### Warning times by size

This table visualizes the warning times of the close approaches listed in the above table, depending on the size of the asteroid. The sizes of each pie chart show the relative sizes of the asteroids to scale. For comparison, the approximate size of a person is also shown. This is based around 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
None
Absolute magnitude 25 > H (largest)
* 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%)