# List of asteroid close approaches to Earth in 2018

Below is the list of asteroid close approaches to Earth in 2018.

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

A list of known near-Earth asteroid close approaches less than 1 lunar distance (0.0025696 AU (384,410 km; 238,860 mi)) from Earth in 2018, based on the close approach database of the Center for Near-Earth Object Studies (CNEOS).
For reference, the radius of Earth is approximately 0.0000426 AU (6,370 km; 3,960 mi) or 0.0166 lunar distances. Geosynchronous satellites have an orbit with semi-major axis length of 0.000282 AU (42,200 km; 26,200 mi) or 0.110 lunar distances. Five asteroids (2018 BD, 2018 PD20, 2018 UA, 2018 WG, and 2018 WV1) are confirmed to have passed within this distance, and unconfirmed or confirmed but poorly observed asteroids A106fgF, A107j4q, ZB0A262, 2018 DN$_4$, ZGBE54F, A1080DC 2018 VQ$_{10}$, ZW87F01, and ZW900BE may have also passed within this distance.
The largest asteroid to pass within 1 LD of Earth in 2018 was 2018 AH with an estimated diameter of around 137 meters and an absolute magnitude of 22.5. The fastest asteroid to pass within 1 LD of Earth in 2018 was 2018 GE3 that passed Earth with a velocity with respect to Earth of 29.6 km/s (66,000 mph).
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 are only included if the object was found by precovery.
This list and relevant databases do not consider impacts as close approaches, thus this list does not include 2018 LA, an asteroid which was predicted to impact on Earth and burned up in its atmosphere, as well as several more objects that collided with Earth's atmosphere in 2018 which weren't 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 |
| 2018-01-02 | 2018-01-04 | 2018 AH | 0.00199 AU (298,000 km; 185,000 mi) | 0.773 | 77–170 | 22.7 | — | data · 2018 AH |
| 2018-01-15 | 2018-01-17 | 2018 BW | 0.00112 AU (168,000 km; 104,000 mi) | 0.435 | 6.4–14 | 28.1 | — | data · 2018 BW |
| 2018-01-16 | 2018-01-17 | 2018 BR$_1$ | 0.000877 AU (131,200 km; 81,500 mi) | 0.341 | 3.3–7.5 | 29.5 | — | data · 2018 BR$_1$ |
| 2018-01-18 | 2018-01-18 | 2018 BD | 0.000262 AU (39,200 km; 24,400 mi) | 0.102 | 2.5–5.7 | 30.1 | — | data · 2018 BD |
| 2018-01-19 | 2018-01-20 | 2018 BF3 | 0.00162 AU (242,000 km; 151,000 mi) | 0.632 | 17–38 | 26.0 | — | data · 2018 BF$_3$ |
| 2018-01-19 | 2018-01-17 | 2018 BC | 0.00189 AU (283,000 km; 176,000 mi) | 0.734 | 3.5–7.8 | 29.4 | — | data · 2018 BC |
| 2018-01-19 | 2018-01-18 | 2018 BX | 0.00188 AU (281,000 km; 175,000 mi) | 0.730 | 4–9 | 29.1 | — | data · 2018 BX |
| 2018-01-20 | 2018-01-24 | 2018 BL$_{11}$ | 0.00202 AU (302,000 km; 188,000 mi) | 0.788 | 6.1–14 | 28.2 | ✓ | data · 2018 BL$_{11}$ |
| 2018-01-24 | 2018-01-27 | 2018 BN$_6$ | 0.00242 AU (362,000 km; 225,000 mi) | 0.943 | 12–26 | 26.8 | — | data · 2018 BN$_6$ |
| 2018-02-04 | 2018-02-07 | 2018 CS$_1$ | 0.00230 AU (344,000 km; 214,000 mi) | 0.896 | 6.1–14 | 28.2 | — | data · 2018 CS$_1$ |
| 2018-02-06 | 2018-02-07 | 2018 CF2 | 0.000650 AU (97,200 km; 60,400 mi) | 0.253 | 6.7–15 | 28.0 | — | data · 2018 CF$_2$ |
| 2018-02-06 | 2018-02-04 | 2018 CC | 0.00126 AU (188,000 km; 117,000 mi) | 0.492 | 13–28 | 26.6 | — | data · 2018 CC |
| 2018-02-09 | 2018-02-08 | 2018 CN2 | 0.000467 AU (69,900 km; 43,400 mi) | 0.182 | 7.3–16 | 27.8 | — | data · 2018 CN$_2$ |
| 2018-02-09 | 2018-02-04 | 2018 CB | 0.000466 AU (69,700 km; 43,300 mi) | 0.181 | 18–39 | 25.9 | — | data · 2018 CB |
| 2018-02-16 | 2018-02-10 | 2018 CD$_3$ | 0.00237 AU (355,000 km; 220,000 mi) | 0.924 | 5.1–11 | 28.6 | — | data · 2018 CD$_3$ |
| 2018-02-21 | 2018-02-22 | 2018 DQ | 0.000671 AU (100,400 km; 62,400 mi) | 0.261 | 4–9 | 29.1 | — | data · 2018 DQ |
| 2018-02-24 | 2018-02-26 | 2018 DN$_4$ | 0.00140 AU (209,000 km; 130,000 mi) | 0.543 | 5.2–12 | 28.5 | ? | data · 2018 DN$_4$ |
| 2018-02-25 | 2018-02-23 | 2018 DU | 0.00190 AU (284,000 km; 177,000 mi) | 0.739 | 5.8–13 | 28.3 | — | data · 2018 DU |
| 2018-03-02 | 2018-02-26 | 2018 DV1 | 0.000753 AU (112,600 km; 70,000 mi) | 0.293 | 5.6–12 | 28.4 | — | data · 2018 DV$_1$ |
| 2018-03-14 | 2018-03-12 | 2018 EZ$_2$ | 0.00144 AU (215,000 km; 134,000 mi) | 0.560 | 15–34 | 26.6 | ✓ | data · 2018 EZ$_2$ |
| 2018-03-17 | 2018-03-19 | 2018 FL$_{29}$ | 0.00148 AU (221,000 km; 138,000 mi) | 0.578 | 2.6–5.7 | 30.1 | — | data · 2018 FL$_{29}$ |
| 2018-03-18 | 2018-03-21 | 2018 FE$_3$ | 0.000978 AU (146,300 km; 90,900 mi) | 0.381 | 9.7–22 | 27.2 | — | data · 2018 FE$_3$ |
| 2018-03-19 | 2018-03-20 | 2018 FQ$_3$ | 0.00187 AU (280,000 km; 174,000 mi) | 0.727 | 5.1–11 | 28.6 | — | data · 2018 FQ$_3$ |
| 2018-03-23 | 2018-03-21 | 2018 FZ$_3$ | 0.00129 AU (193,000 km; 120,000 mi) | 0.501 | 8.1–18 | 27.6 | — | data · 2018 FZ$_3$ |
| 2018-03-30 | 2018-03-28 | 2018 FK$_5$ | 0.00100 AU (150,000 km; 93,000 mi) | 0.391 | 5.8–13 | 28.3 | — | data · 2018 FK$_5$ |
| 2018-04-07 | 2018-04-11 | 2018 GR$_{11}$ | 0.00177 AU (265,000 km; 165,000 mi) | 0.688 | 5.3–12 | 28.5 | — | data · 2018 GR$_{11}$ |
| 2018-04-10 | 2008-04-13 | 2008 GY$_{21}$ aka 2018 GY$_3$ | 0.00201 AU (301,000 km; 187,000 mi) | 0.783 | 8–18 | 27.6 | — | data · 2008 GY$_{21}$ |
| 2018-04-12 | 2018-04-11 | 2018 GD$_2$ | 0.00201 AU (301,000 km; 187,000 mi) | 0.781 | 3.3–7.5 | 29.5 | — | data · 2018 GD$_2$ |
| 2018-04-15 | 2018-04-14 | 2018 GE3 | 0.00129 AU (193,000 km; 120,000 mi) | 0.502 | 46–100 | 23.8 | ✓ | data · 2018 GE$_3$ |
| 2018-04-21 | 2018-04-23 | 2018 HW$_1$ | 0.00229 AU (343,000 km; 213,000 mi) | 0.893 | 18–41 | 25.8 | — | data · 2018 HW$_1$ |
| 2018-04-22 | 2018-04-21 | 2018 HV | 0.00103 AU (154,000 km; 96,000 mi) | 0.403 | 4.4–9.9 | 28.9 | — | data · 2018 HV |
| 2018-05-09 | 2020-02-15 | 2020 CD3 | 0.000172 AU (25,700 km; 16,000 mi) | 0.067 | 1.2–2.7 | 31.7 | — | data · 2020 CD$_3$ |
| 2018-05-15 | 2010-11-30 | 2010 WC9 | 0.00136 AU (203,000 km; 126,000 mi) | 0.528 | 53–120 | 23.5 | — | data · 2010 WC$_9$ |
| 2018-05-23 | 2018-05-22 | 2018 KW$_1$ | 0.00100 AU (150,000 km; 93,000 mi) | 0.388 | 3.1–6.8 | 29.7 | — | data · 2018 KW$_1$ |
| 2018-05-26 | 2018-05-24 | 2018 KY$_2$ | 0.00200 AU (299,000 km; 186,000 mi) | 0.779 | 9.7–22 | 27.2 | — | data · 2018 KY$_2$ |
| 2018-06-15 | 2018-06-11 | 2018 LV$_3$ | 0.00220 AU (329,000 km; 205,000 mi) | 0.858 | 13–30 | 26.5 | — | data · 2018 LV$_3$ |
| 2018-06-16 | 2018-06-17 | 2018 MZ$_4$ | 0.00139 AU (208,000 km; 129,000 mi) | 0.541 | 4.6–10 | 28.8 | ✓ | data · 2018 MZ$_4$ |
| 2018-07-07 | 2018-07-08 | 2018 NX | 0.000782 AU (117,000 km; 72,700 mi) | 0.304 | 7.7–17 | 27.7 | — | data · 2018 NX |
| 2018-07-08 | 2018-07-08 | 2018 NW | 0.000833 AU (124,600 km; 77,400 mi) | 0.324 | 7.3–16 | 27.8 | — | data · 2018 NW |
| 2018-08-10 | 2018-08-11 | 2018 PD20 | 0.000224 AU (33,500 km; 20,800 mi) | 0.087 | 8.8–20 | 27.4 | — | data · 2018 PD$_{20}$ |
| 2018-08-21 | 2018-08-21 | 2018 QR$_1$ | 0.000590 AU (88,300 km; 54,800 mi) | 0.230 | 9.5–21 | 27.2 | — | data · 2018 QR$_1$ |
| 2018-09-03 | 2018-09-07 | 2018 RR$_1$ | 0.00243 AU (364,000 km; 226,000 mi) | 0.945 | 2.7–6 | 30.0 | — | data · 2018 RR$_1$ |
| 2018-09-05 | 2018-09-06 | 2018 RS | 0.000710 AU (106,200 km; 66,000 mi) | 0.276 | 2.7–5.9 | 30.0 | — | data · 2018 RS |
| 2018-09-06 | 2018-09-07 | 2018 RE$_2$ | 0.00255 AU (381,000 km; 237,000 mi) | 0.991 | 5.3–12 | 28.5 | — | data · 2018 RE$_2$ |
| 2018-09-07 | 2018-09-09 | 2018 RJ$_3$ | 0.00112 AU (168,000 km; 104,000 mi) | 0.435 | 7.3–16 | 27.8 | — | data · 2018 RJ$_3$ |
| 2018-09-08 | 2018-09-07 | 2018 RW | 0.00114 AU (171,000 km; 106,000 mi) | 0.445 | 2–4.5 | 30.6 | — | data · 2018 RW |
| 2018-09-09 | 2018-09-03 | 2018 RC | 0.00150 AU (224,000 km; 139,000 mi) | 0.584 | 27–61 | 24.9 | — | data · 2018 RC |
| 2018-09-12 | 2018-09-13 | 2018 RY$_5$ | 0.00120 AU (180,000 km; 112,000 mi) | 0.467 | 13–28 | 26.6 | — | data · 2018 RY$_5$ |
| 2018-09-12 | 2018-09-13 | 2018 RZ$_5$ | 0.000331 AU (49,500 km; 30,800 mi) | 0.129 | 3–6.8 | 29.7 | — | data · 2018 RZ$_5$ |
| 2018-09-15 | 2018-09-16 | 2018 SM | 0.000285 AU (42,600 km; 26,500 mi) | 0.111 | 3.5–7.8 | 29.4 | — | data · 2018 SM |
| 2018-09-18 | 2018-09-17 | 2018 SC | 0.00179 AU (268,000 km; 166,000 mi) | 0.699 | 6.7–15 | 28.0 | — | data · 2018 SC |
| 2018-09-25 | 2018-09-21 | 2018 SD$_2$ | 0.000587 AU (87,800 km; 54,600 mi) | 0.229 | 5.1–11 | 28.6 | — | data · 2018 SD$_2$ |
| 2018-09-30 | 2018-10-02 | 2018 TC | 0.00204 AU (305,000 km; 190,000 mi) | 0.795 | 13–28 | 26.6 | — | data · 2018 TC |
| 2018-10-06 | 2018-10-05 | 2018 TV$_5$ | 0.000682 AU (102,000 km; 63,400 mi) | 0.265 | 3.3–7.5 | 29.5 | — | data · 2018 TV$_5$ |
| 2018-10-07 | 2018-10-05 | 2018 TV | 0.00190 AU (284,000 km; 177,000 mi) | 0.741 | 5.1–11 | 28.6 | — | data · 2018 TV |
| 2018-10-17 | 2018-10-18 | 2018 UL | 0.00148 AU (221,000 km; 138,000 mi) | 0.575 | 3.8–8.6 | 29.2 | ✓ | data · 2018 UL |
| 2018-10-19 | 2018-10-19 | 2018 UA | 0.0000914 AU (13,670 km; 8,500 mi) | 0.036 | 2.4–5.4 | 30.2 | — | data · 2018 UA |
| 2018-11-02 | 2018-11-03 | 2018 VP1 | 0.00101 AU (151,000 km; 94,000 mi) | 0.393 | 1.8–3.9 | 30.9 | — | data · 2018 VP$_1$ |
| 2018-11-05 | 2018-11-08 | 2018 VT$_5$ | 0.00123 AU (184,000 km; 114,000 mi) | 0.481 | 5.3–12 | 28.5 | — | data · 2018 VT$_5$ |
| 2018-11-06 | 2018-11-07 | 2018 VO$_5$ | 0.000942 AU (140,900 km; 87,600 mi) | 0.367 | 12–27 | 26.7 | — | data · 2018 VO$_5$ |
| 2018-11-10 | 2018-11-04 | 2018 VX$_1$ aka 2018 VA$_6$ | 0.00255 AU (381,000 km; 237,000 mi) | 0.992 | 8.4–19 | 27.5 | — | data · 2018 VX$_1$ |
| 2018-11-13 | 2018-11-10 | 2018 VC$_7$ | 0.00224 AU (335,000 km; 208,000 mi) | 0.871 | 8.8–20 | 27.4 | — | data · 2018 VC$_7$ |
| 2018-11-13 | 2018-11-16 | 2018 WA$_1$ | 0.00168 AU (251,000 km; 156,000 mi) | 0.653 | 2.5–5.7 | 30.1 | — | data · 2018 WA$_1$ |
| 2018-11-14 | 2018-11-15 | 2018 VJ$_{10}$ | 0.00133 AU (199,000 km; 124,000 mi) | 0.517 | 5.1–11 | 28.6 | ✓ | data · 2018 VJ$_{10}$ |
| 2018-11-16 | 2018-11-17 | 2018 WH | 0.00127 AU (190,000 km; 118,000 mi) | 0.496 | 2.9–6.5 | 29.8 | — | data · 2018 WH |
| 2018-11-16 | 2018-11-17 | 2018 WG | 0.000206 AU (30,800 km; 19,100 mi) | 0.080 | 3.7–8.2 | 29.3 | — | data · 2018 WG |
| 2018-11-18 | 2018-11-17 | 2018 WE | 0.00160 AU (239,000 km; 149,000 mi) | 0.624 | 5.6–12 | 28.4 | ✓ | data · 2018 WE |
| 2018-11-19 | 2018-11-17 | 2018 WJ | 0.000794 AU (118,800 km; 73,800 mi) | 0.309 | 7–16 | 27.9 | — | data · 2018 WJ |
| 2018-11-25 | 2018-11-26 | 2018 WE$_1$ | 0.000716 AU (107,100 km; 66,600 mi) | 0.279 | 16–36 | 26.1 | — | data · 2018 WE$_1$ |
| 2018-11-27 | 2018-11-28 | 2018 WZ$_1$ | 0.000729 AU (109,100 km; 67,800 mi) | 0.284 | 3.5–7.8 | 29.4 | — | data · 2018 WZ$_1$ |
| 2018-11-28 | 2018-11-29 | 2018 WA$_3$ | 0.00216 AU (323,000 km; 201,000 mi) | 0.839 | 6.7–15 | 28.0 | — | data · 2018 WA$_3$ |
| 2018-11-30 | 2018-11-29 | 2018 WG$_2$ | 0.00134 AU (200,000 km; 125,000 mi) | 0.520 | 2.5–5.7 | 30.1 | — | data · 2018 WG$_2$ |
| 2018-12-02 | 2018-11-29 | 2018 WV1 | 0.000221 AU (33,100 km; 20,500 mi) | 0.086 | 2.3–5.2 | 30.3 | — | data · 2018 WV$_1$ |
| 2018-12-11 | 2018-12-13 | 2018 XA$_4$ | 0.00249 AU (372,000 km; 231,000 mi) | 0.969 | 4.2–9.4 | 29.0 | ✓ | data · 2018 XA$_4$ |
| 2018-12-27 | 2018-12-28 | 2018 YL$_2$ | 0.000398 AU (59,500 km; 37,000 mi) | 0.155 | 3.5–7.8 | 29.4 | — | data · 2018 YL$_2$ |
| 2018-12-28 | 2018-12-29 | 2018 YO$_2$ | 0.00131 AU (196,000 km; 122,000 mi) | 0.510 | 2.9–6.5 | 29.8 | — | data · 2018 YO$_2$ |
| 2018-12-28 | 2019-01-03 | 2019 AW$_2$ | 0.00111 AU (166,000 km; 103,000 mi) | 0.430 | 22–50 | 25.4 | — | data · 2019 AW$_2$ |
In addition to the confirmed asteroids on the above list, which feature in the CNEOS close approach database, there have been well-observed unconfirmed or confirmed but poorly observed objects with a 50% or greater chance of passing within 1 LD of the Earth, which are listed separately below.
| 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 |
| 2018-01-22 | 2018-01-22 | A106fgF | Potential Impact? | 0.0011 | 2–5 | 30.6 | — | Src |
| 2018-01-25 | 2018-01-26 | ZB0A262 | 0.000401 AU (60,000 km; 37,300 mi) | 0.16 | 2–5 | 30.6 | — | Src |
| 2018-04-12 | 2018-04-13 | ZGBE54F | 0.000469 AU (70,200 km; 43,600 mi) | 0.18 | 2–7 | 30.0 | — | Src |
| 2018-06-17 | 2018-06-17 | A107j4q | 0.000206 AU (30,800 km; 19,100 mi) | 0.080 | 4–11 | 28.9 | — | Src · diagram |
| 2018-06-23 | 2018-06-24 | A107pL2 | 0.000525 AU (78,500 km; 48,800 mi) | 0.20 | 3–9 | 29.5 | — | Src |
| 2018-07-04 | 2018-07-05 | ZN2E090 | 0.00132 AU (197,000 km; 123,000 mi) | 0.51 | 4–12 | 28.8 | — | Src |
| 2018-08-12 | 2018-08-13 | A1080DC | 0.000284 AU (42,500 km; 26,400 mi) | 0.11 | 1–4 | 31.3 | — | Src |
| 2018-10-06 | 2018-10-06 | ZTF01Z9 | 0.00170 AU (254,000 km; 158,000 mi) | 0.66 | 4–12 | 28.8 | — | Src |
| 2018-11-01 | 2018-11-01 | 2018 VQ$_{10}$ | 0.000276 AU (41,300 km; 25,700 mi) | 0.11 | 2–5 | 30.6 | — | Temp. src |
| 2018-11-11 | 2018-11-11 | 2018 VS$_{10}$ | 0.00103 AU (154,000 km; 96,000 mi) | 0.40 | 3–10 | 29.1 | — | Temp. src |
| 2018-11-15 | 2018-11-17 | ZW84BCD | 0.000845 AU (126,400 km; 78,500 mi) | 0.33 | 2–7 | 30.0 | — | Src |
| 2018-11-16 | 2018-11-17 | ZW87F01 | 0.000594 AU (88,900 km; 55,200 mi) | 0.23 | 1–2 | 32.3 | — | Src |
| 2018-11-28 | 2018-11-29 | ZW900BE | 0.000224 AU (33,500 km; 20,800 mi) | 0.087 | 1–4 | 31.2 | — | Src |
| 2018-12-30 | 2018-12-31 | 2018 YJ$_4$ | 0.000725 AU (108,500 km; 67,400 mi) | 0.28 | 2–7 | 29.8 | — | Temp. src |

### Warning times by size

This sub-section visualises the warning times of the close approaches listed in the table of confirmed close approaches, 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
Absolute magnitude 25 > H (largest)
* After closest approach: 1 (25.0%)
* < 24 hours before: 0 (0.0%)
* up to 7 days before: 2 (50.0%)
* > one week before: 0 (0.0%)
* > 7 weeks before: 0 (0.0%)
* > one year before: 1 (25.0%)