List of asteroid close approaches to Earth in 2023
As most asteroids passing within a lunar distance are less than 40 meters in diameter, they generally are not detected until they are within several million km of Earth.
Beyond 1 LD
Below is an example list of near-Earth asteroids that nominally will pass more than 1 lunar distance (384,400 km or 0.00256 AU) from Earth in 2023.
Rows highlighted grey indicate a planet or main-belt asteroid
Rows highlighted yellow indicate short arc objects that have not been observed for years and therefore the uncertainty in the approach distance and date are large
Rows highlighted red indicate objects which are risk–listed with a virtual impactor near this date
| Object | Size (meters) |
Nearest approach (lunar distances) |
Date | Ref |
|---|---|---|---|---|
| 2020 BP | 19-43 | 0.43–40 (5 LD nominal) | 2023-01-20? | JPL · CAD |
| (367789) 2011 AG5 | 110–250 | 4.7 | 2023-02-03 | JPL · CAD |
| 2020 DG4 | 6-14 | 1.2–11 (1.4 LD nominal) | 2023-02-17? | JPL · CAD |
| 364P/PANSTARRS | ≈300? | 46.98 | 2023-04-07 | JPL · CAD |
| 4486 Mithra | 1850 | 63.31 | 2023-04-11 | JPL · CAD |
| Planet Mercury[note2 1] | — | 217.7 | 2023-05-04 | JPL |
| 2012 KP24 | 14-31 | 0.19–24 (10 LD nominal) | 2023-05-31? | JPL · CAD |
| 2016 LP10[note2 2] | 4-8 | Impact–600 (245 LD nominal) | 2023-06-10? | Nominal |
| (488453) 1994 XD | 600 | 8.23[note2 3] | 2023-06-12 | JPL · CAD |
| (467336) 2002 LT38 | 200–450 | 17.32 | 2023-06-24 | JPL · CAD |
| Planet Venus[note2 4] | — | 112.4 | 2023-08-03 | JPL |
| 4769 Castalia | 1400 | 42.82 | 2023-08-22 | JPL · CAD |
| 8 Flora (MBA) | 147000 | 387.1 | 2023-09-02 | JPL |
| 2016 LY48 | 77-170 | 4.3–8.7 (4.3 LD nominal) | 2023-09-17? | JPL · CAD |
| 2022 UX1 | 7-15 | 1.9–5.2 (3.1 LD nominal) | 2023-10-12 | JPL · CAD |
| 1998 HH49 | 140-320 | 3.05[note2 5] | 2023-10-17 | JPL · CAD |
| 4544 Xanthus | 1300 | 76.10 | 2023-10-21 | JPL · CAD |
| 18 Melpomene (MBA) | 140000 | 334.2 | 2023-10-30 | JPL |
| (525229) 2004 UU1 | 150–330 | 10.61 | 2023-10-30 | JPL · CAD |
| (363505) 2003 UC20 | 1900 | 13.66 | 2023-11-02 | JPL · CAD |
| (164121) 2003 YT1 | 1720 | 23.10 | 2023-11-03 | JPL · CAD |
| (7350) 1993 VA | 1900 | 50.36 | 2023-11-14 | JPL · CAD |
| (341843) 2008 EV5 | 400 | 16.4 | 2023-12-20 | JPL · CAD |
Notes
- ^ Mercury also will pass 260.9 LD from Earth on January 8, 244.4 LD from Earth on September 3, and 263.2 LD from Earth on December 23. Mercury makes a closest approach to Earth about every 116 days.
- ^ The asteroid with the greatest chance of impacting Earth in 2023 is 2016 LP10 (4-meters in diameter) with less than a 1-day observation arc. It has a 1:53,000 chance of impact on 10 June 2023, but is expected to be around 0.63 AU (94 million km; 250 LD) from Earth on that date at a basically undetectable apparent magnitude of 31. Such an impact would be similar to 2008 TC3.
- ^ The uncertainty region for 1994 XD on 2023-Jun-12 is ±17 km.
- ^ For comparison as closest Venus approach is 2023-Aug-13 at 0.2887 AU (112.4 LD).
- ^ The uncertainty region for 1998 HH49 on 2023-Oct-17 is ±471 km.