# List of asteroid close approaches to Earth in 2009

Below is the list of asteroid close approaches to Earth in 2009.

## Timeline of close approaches less than one lunar distance from Earth in 2009

A list of known near-Earth asteroid close approaches less than 1 lunar distance (384,400 km or 0.00257 AU) from Earth in 2009, 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 2009.
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 2009, 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 |
| 2009-02-02 | 2009-02-04 | 2009 CC$_2$ | 0.00126 AU (188,000 km; 117,000 mi) | 0.49 | 7.3–16 | 27.8 | | data · 2009 CC$_2$ |
| 2009-02-27 | 2009-03-03 | 2009 EJ$_1$ | 0.000411 AU (61,500 km; 38,200 mi) | 0.16 | 5.6–12 | 28.4 | | data · 2009 EJ$_1$ |
| 2009-03-02 | 2009-02-27 | 2009 DD$_{45}$ | 0.000483 AU (72,300 km; 44,900 mi) | 0.19 | 18–41 | 25.8 | | data · 2009 DD$_{45}$ |
| 2009-03-06 | 2009-03-02 | 2009 EW | 0.00227 AU (340,000 km; 211,000 mi) | 0.88 | 14–31 | 26.4 | | data · 2009 EW |
| 2009-03-18 | 2009-03-17 | 2009 FH | 0.000568 AU (85,000 km; 52,800 mi) | 0.22 | 13–28 | 26.6 | | data · 2009 FH |
| 2009-03-19 | 2009-03-17 | 2009 FK | 0.00251 AU (375,000 km; 233,000 mi) | 0.98 | 5.8–13 | 28.3 | Yes | data · 2009 FK |
| 2009-05-05 | 2009-05-04 | 2009 JF1 | 0.00196 AU (293,000 km; 182,000 mi) | 0.76 | 7.6–17 | 27.7 | Yes | data · 2009 JF$_1$ |
| 2009-05-13 | 2009-05-12 | 2009 JL$_2$ | 0.00177 AU (265,000 km; 165,000 mi) | 0.69 | 17–38 | 26.0 | | data · 2009 JL$_2$ |
| 2009-06-01 | 2009-05-31 | 2009 KR$_{21}$ | 0.00190 AU (284,000 km; 177,000 mi) | 0.74 | 12–27 | 26.7 | Yes | data · 2009 KR$_{21}$ |
| 2009-10-01 | 2009-10-02 | 2009 TB | 0.000464 AU (69,400 km; 43,100 mi) | 0.18 | 3.8–8.6 | 29.2 | | data · 2009 TB |
| 2009-10-05 | 2009-10-09 | 2009 TD$_{17}$ | 0.00173 AU (259,000 km; 161,000 mi) | 0.67 | 7.7–17 | 27.7 | | data · 2009 TD$_{17}$ |
| 2009-10-08 | 2009-10-10 | 2009 TU | 0.00204 AU (305,000 km; 190,000 mi) | 0.79 | 9.2–21 | 27.3 | | data · 2009 TU |
| 2009-10-17 | 2009-10-15 | 2009 TM$_8$ | 0.00232 AU (347,000 km; 216,000 mi) | 0.90 | 5.6–12 | 28.4 | | data · 2009 TM$_8$ |
| 2009-11-06 | 2009-11-06 | 2009 VA | 0.000137 AU (20,500 km; 12,700 mi) | 0.05 | 5.1–11 | 28.6 | | data · 2009 VA |
| 2009-11-12 | 2009-11-10 | 2009 VZ$_{39}$ | 0.00174 AU (260,000 km; 162,000 mi) | 0.68 | 6.5–14 | 28.1 | Yes? | data · 2009 VZ$_{39}$ |
| 2009-11-15 | 2009-11-18 | 2009 WP$_6$ | 0.00176 AU (263,000 km; 164,000 mi) | 0.69 | 12–26 | 26.8 | | data · 2009 WP$_6$ |
| 2009-11-16 | 2009-11-18 | 2009 WQ$_6$ | 0.00235 AU (352,000 km; 218,000 mi) | 0.91 | 3.8–8.6 | 29.2 | | data · 2009 WQ$_6$ |
| 2009-11-20 | 2009-11-19 | 2009 WJ$_6$ | 0.00119 AU (178,000 km; 111,000 mi) | 0.46 | 8.8–20 | 27.4 | | data · 2009 WJ$_6$ |
| 2009-11-24 | 2009-11-23 | 2009 WV$_{51}$ | 0.00101 AU (151,000 km; 94,000 mi) | 0.39 | 10–23 | 27.1 | | data · 2009 WV$_{51}$ |

### 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)
None
Absolute magnitude 30 > H ≥ 29
(size of a person for comparison)
Absolute magnitude 28-29
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