List of asteroid close approaches to Earth in 2009
Time of discovery of asteroids which came closer to Earth than the moon 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 0.00256 AU) from Earth in 2009.[note 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)
This list does not include any of the objects that collided with earth in 2009, none of which were discovered in advance, but were recorded by sensors designed to detect detonation of nuclear devices.
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[1][2] |
---|---|---|---|---|---|---|---|---|
2009-02-02 | 2009-02-04 | 2009 CC2 | 0.00123 AU (184,000 km; 114,000 mi) | 0.48 | 7.3–16 | 27.8 | data · 2009 CC2 | |
2009-02-27 | 2009-03-03 | 2009 EJ1 | 0.00041 AU (61,000 km; 38,000 mi) | 0.16 | 5.6–12 | 28.4 | data · 2009 EJ1 | |
2009-03-02 | 2009-02-27 | 2009 DD45 | 0.00048 AU (72,000 km; 45,000 mi) | 0.19 | 18–41 | 25.8 | data · 2009 DD45 | |
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 | 0.00057 AU (85,000 km; 53,000 mi) | 0.22 | 13–28 | 26.6 | data · 2009 FH | |
2009-03-19 | 2009-03-17 | 2009 FK | 0.00250 AU (374,000 km; 232,000 mi) | 0.97 | 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 | 10–23 | 27.1 | Yes | data · 2009 JF1 |
2009-05-13 | 2009-05-12 | 2009 JL2 | 0.00177 AU (265,000 km; 165,000 mi) | 0.69 | 17–38 | 26.0 | data · 2009 JL2 | |
2009-06-01 | 2009-05-31 | 2009 KR21 | 0.00190 AU (284,000 km; 177,000 mi) | 0.74 | 12–27 | 26.7 | Yes | data · 2009 KR21 |
2009-10-01 | 2009-10-02 | 2009 TB | 0.00046 AU (69,000 km; 43,000 mi) | 0.18 | 3.8–8.6 | 29.2 | data · 2009 TB | |
2009-10-05 | 2009-10-09 | 2009 TD17 | 0.00173 AU (259,000 km; 161,000 mi) | 0.67 | 7.7–17 | 27.7 | data · 2009 TD17 | |
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 TM8 | 0.00232 AU (347,000 km; 216,000 mi) | 0.90 | 5.6–12 | 28.4 | data · 2009 TM8 | |
2009-11-06 | 2009-11-06 | 2009 VA | 0.00014 AU (21,000 km; 13,000 mi) | 0.05 | 5.1–11 | 28.6 | data · 2009 VA | |
2009-11-12 | 2009-11-10 | 2009 VZ39 | 0.00174 AU (260,000 km; 162,000 mi) | 0.68 | 6.5–14 | 28.1 | Yes?[note 3] | data · 2009 VZ39 |
2009-11-15 | 2009-11-18 | 2009 WP6 | 0.00176 AU (263,000 km; 164,000 mi) | 0.69 | 12–26 | 26.8 | data · 2009 WP6 | |
2009-11-16 | 2009-11-18 | 2009 WQ6 | 0.00235 AU (352,000 km; 218,000 mi) | 0.91 | 3.8–8.6 | 29.2 | data · 2009 WQ6 | |
2009-11-20 | 2009-11-19 | 2009 WJ6 | 0.00119 AU (178,000 km; 111,000 mi) | 0.46 | 8.8–20 | 27.4 | data · 2009 WJ6 | |
2009-11-24 | 2009-11-23 | 2009 WV51 | 0.00101 AU (151,000 km; 94,000 mi) | 0.39 | 10–23 | 27.1 | data · 2009 WV51 |
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.
Abs Magnitude 29-30
(size of a person for comparison)