List of asteroid close approaches to Earth in 2018


Time of discovery of asteroids which came closer to Earth than the Moon 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 from Earth in 2018.
For reference, the radius of Earth is approximately or 0.0166 lunar distances.
Geosynchronous satellites have an orbit with semi-major axis length of or 0.110 lunar distances. Eight known asteroids are confirmed to have passed within this distance, and poorly-observed asteroids ZB0A262,, ZGBE54F, A1080DC, ZW87F01, and ZW900BE may have also passed within this distance.
While most asteroids on this list are confirmed, well-observed unconfirmed objects with a 50% or greater chance of passing within 1 LD of the Earth are included as well.
Date of
closest
approach
Date
discovered
ObjectNominal geocentric
distance
Nominal geocentric
distance
Size

Closer
approach
to Moon
Refs
2018-01-022018-01-042018 AH0.7784–19022.5
2018-01-152018-01-172018 BW0.436–1428.1
2018-01-162018-01-170.343–829.5
2018-01-182018-01-182018 BD0.102–630.1
2018-01-192018-01-20'0.6317–3826.0
2018-01-192018-01-172018 BC0.733–929.4
2018-01-192018-01-182018 BX0.734–929.1
2018-01-202018-01-240.795–1328.3
2018-01-222018-01-22A106fgFPotential Impact?0.00112–530.6
2018-01-242018-01-270.9412–2626.8
2018-01-252018-01-26ZB0A2620.162–530.6
2018-02-042018-02-070.906–1428.2
2018-02-062018-02-07'0.256–1528.0
2018-02-062018-02-042018 CC0.4913–2826.6
2018-02-092018-02-08'0.187–1627.8
2018-02-092018-02-042018 CB0.1818–3925.9
2018-02-162018-02-100.925–1128.6
2018-02-212018-02-222018 DQ0.264–929.1
2018-02-242018-02-260.555–1228.4?
2018-02-252018-02-232018 DU0.745–1328.3
2018-03-022018-02-26'0.295–1228.4
2018-03-142018-03-120.5613–2826.6
2018-03-172018-03-190.582–630.1
2018-03-182018-03-210.389–2227.2
2018-03-192018-03-200.735–1128.6
2018-03-232018-03-210.508–1827.6
2018-03-302018-03-280.395–1328.3
2018-04-072018-04-110.696–1228.5
2018-04-102008-04-13 aka
0.788–1827.6
2018-04-122018-04-13ZGBE54F0.182–730.0
2018-04-122018-04-110.783–829.4
2018-04-152018-04-14'0.5046–10023.8
2018-04-212018-04-230.8918–4125.8
2018-04-222018-04-212018 HV0.404–1028.9
2018-05-152010-11-30'0.5351–11023.6
2018-05-232018-05-220.393–729.7
2018-05-262018-05-240.789–2227.2
2018-06-022018-06-022018 LA
0.0130
2–330.5
2018-06-152018-06-110.8613–3026.5
2018-06-162018-06-170.544–1028.8
2018-06-172018-06-17A107j4p0.0804–1128.9
2018-06-232018-06-24A107pL20.203–929.5
2018-07-042018-07-05ZN2E0900.514–1228.8
2018-07-072018-07-082018 NX0.307–1727.7
2018-07-082018-07-082018 NW0.327–1627.8
2018-08-102018-08-110.0878–2027.4
2018-08-122018-08-13A1080DC0.111–431.3
2018-08-212018-08-210.238–2027.4
2018-09-032018-09-070.942–629.9
2018-09-052018-09-062018 RS0.282–930.0
2018-09-062018-09-070.9915–1228.5
2018-09-072018-09-090.447–1627.8
2018-09-082018-09-072018 RW0.442–530.3
2018-09-092018-09-032018 RC0.5828–6324.9
2018-09-122018-09-130.4710–3626.5
2018-09-122018-09-130.132–829.7
2018-09-152018-09-162018 SM0.113–929.4
2018-09-162018-09-180.512–729.9
2018-09-182018-09-172018 SC0.705–1927.9
2018-09-252018-09-210.234–1228.6
2018-09-302018-10-022018 TC0.7910–3126.6
2018-10-062018-10-050.273–929.5
2018-10-062018-10-06ZTF01Z90.664–1228.8
2018-10-072018-10-052018 TV0.744–1328.6
2018-10-172018-10-182018 UL0.573–1129.1
2018-10-192018-10-192018 UA0.0362–630.2
2018-11-012018-11-010.112–530.6
2018-11-022018-11-030.391–530.8
2018-11-052018-11-080.484–1628.3
2018-11-062018-11-070.379–3326.7
2018-11-072018-11-10ZV33FBC0.579–2826.9?
2018-11-102018-11-04 aka
0.9946–2227.5
2018-11-112018-11-110.403–1029.1
2018-11-132018-11-100.877–2327.4
2018-11-132018-11-160.652–730.0
2018-11-142018-11-150.524–1228.6
2018-11-152018-11-17ZW84BCD0.332–730.0
2018-11-162018-11-17ZW87F010.231–232.3
2018-11-162018-11-172018 WH0.502–829.8
2018-11-162018-11-172018 WG0.0803–1029.3
2018-11-182018-11-172018 WE0.624–1628.3
2018-11-192018-11-172018 WJ0.316–2627.5
2018-11-252018-11-260.2812–5126.0
2018-11-272018-11-280.283–929.4
2018-11-282018-11-290.845–2027.8
2018-11-282018-11-29ZW900BE0.0871–431.2
2018-11-302018-11-290.522–730.1
2018-12-022018-11-290.0862–630.2
2018-12-112018-12-130.973–1129.1
2018-12-272018-12-280.153–1029.3
2018-12-282018-12-290.512–629.8
2018-12-282019-01-030.4322–6925.1
2018-12-302018-12-310.282–729.8

Timeline of close approaches less than one lunar distance from the Moon

The number of asteroids listed here are significantly less than those of asteroids that approach Earth for several reasons. Asteroids that approach Earth not only move faster, but are brighter and are easier to detect with modern surveys because:
These factors severely limit the amount of Moon-approaching asteroids, to a level many times lower than the asteroids detected passing as close to Earth.
Date of
closest
approach
ObjectNominal lunocentric
distance
Nominal lunocentric
distance
Size

approach
distance
to Earth
Refs
2018-01-152018 BW0.825–1728.10.43
2018-01-192018 BD0.482–630.20.10
2018-01-200.725–1528.30.79
2018-01-24ZB0A2620.572–530.60.16
2018-02-032018 CT0.9715–4725.81.69
2018-02-06'0.794–2028.00.25
2018-02-240.504–1428.40.55
2018-03-01'0.354–1528.40.29
2018-03-140.5310–3426.50.56
2018-03-170.732–730.10.58
2018-03-170.468–2727.10.38
2018-03-300.614–1628.30.39
2018-04-130.863–929.40.78
2018-04-15'0.3437–13823.60.50
2018-05-230.573–829.70.39
2018-06-022018 LA0.832–330.5Impact
2018-06-160.204–1128.80.54
2018-06-17A107j4p0.9954–1128.90.080
2018-06-23A107pL20.813–929.50.20
2018-07-022018 NH0.4324–8824.61.13
2018-07-05ZN2E0900.654–1228.80.51
2018-07-072018 NX0.597–1827.70.30
2018-07-082018 NW0.646–1827.80.32
2018-07-240.288–2127.41.14
2018-08-040.719–3326.71.07
2018-08-10'0.467–2227.40.087
2018-08-120.691–431.30.11
2018-08-150.456–1727.91.32
2018-08-19ZTF00VP0.583–1129.01.12
2018-09-030.9902–729.80.95
2018-09-052018 RS0.852–1229.50.28
2018-09-070.786–1927.80.44
2018-09-082018 RW0.9972–730.30.44
2018-09-102018 RC0.9523–8724.60.58
2018-09-120.522-829.70.13
2018-09-152018 SM0.733-929.40.11
2018-09-150.892–729.90.51
2018-09-190.6014–5025.81.37
2018-09-240.754-1228.60.23
2018-10-060.293–929.50.27
2018-10-172018 UL0.393–1129.10.57
2018-10-192018 UA0.742–630.20.036
2018-11-010.842–530.60.11
2018-11-030.5113–3626.21.13
2018-11-042018 WS0.8911–3426.51.74
2018-11-050.969–3326.70.37
2018-11-06ZV33FBC0.579–2826.90.57
2018-11-140.484–1228.60.52
2018-11-150.952–730.00.65
2018-11-15ZW87F010.761–232.30.23
2018-11-162018 WH0.832–829.80.50
2018-11-182018 WE0.524–1628.30.62
2018-11-192018 WJ0.896–2627.50.31
2018-11-250.5512–5126.00.28
2018-11-25ZTF01p20.9610–3126.71.47
2018-11-250.774–1428.51.18
2018-11-270.883–929.40.28
2018-11-28ZW900BE0.9931–431.20.087
2018-12-050.882–630.20.086
2018-12-080.685–1628.11.009
2018-12-110.613–1129.10.97
2018-12-270.513–1029.30.15
2018-12-300.982–729.80.28

Additional examples

An example list of near-Earth asteroids that passed more than 1 lunar distance from Earth in 2018.
ObjectSize
meters
lunar
distances
DateRef
'62410.92018-02-04
3752 Camillo230653.62018-02-20
'2713.762018-03-07
1981 Midas340034.92018-03-21
461.702018-04-08
2856.482018-05-09
3599.502018-05-29
'86015.52018-06-21
2018 NL321.422018-06-28
1990 MU280041.62018-11-29
624.092018-12-09
'8007.362018-12-22

Statistics

Virtual Impactors

List of asteroids that are listed on the Sentry Risk Table because they have short observation arcs with poorly constrained orbits and have a chance of impacting Earth in 2018. Given a short observation arc, many different orbits fit the observed data. These objects could be millions if not billions of kilometers from Earth on the date of a low probability virtual impactor. For example, is expected to be from Earth in December 2018 around the time of the 3 virtual impactors. 2010 GZ60 was removed from the sentry table in February 2018 after further observations were found by NEOWISE, ruling out any possible impacts.
Cumulatively among the asteroids listed below, there is a roughly 1 in 98,700 chance that any of the asteroids will impact Earth in 2018. Most of this comes from asteroid 2008 US which is only ~2 meters in diameter and had a 1 in 240,000 chance of impact on 18 April 2018.
Also included are asteroids discovered before impact and exceptionally massive fireballs with either an equivalent yield of more than 1 kiloton of TNT or an estimated size of more than 3 meters.
DateObjectEstimated
diameter
Obs
arc
Impact
probability
Sigma from
best-fit orbit
Palermo
scale
JPL Horizons
nominal geocentric
distance
NEODyS
nominal geocentric
distance
2018-01-3190.182,100,000,0000.994-7.87
2018-02-1090.071370,000,0000.039-8.38
2018-02-1590.18100,000,000-2.100-7.70
2018-02-1590.18140,000,000-1.183-7.82
2018-02-1790.18120,000,000-0.465-7.67
2018-02-2490.043110,000,0000.948-7.63
2018-02-2590.0712,000,000-0.690-6.26
2018-02-261571.02,100,000,0000.096-5.47
2018-02-2690.12290,000,000-2.389-8.34
2018-03-0140.0401,100,000,0000.697-9.01
2018-03-0990.0711,700,000,0001.232-8.05
2018-03-1090.0711,100,000,0000.806-8.35
2018-03-11543.12,400,0001.438-3.72
2018-03-1190.0712,900,0000.544-6.01
2018-03-11100.113,400,0001.198-6.09
2018-03-21220.972,000,000,0003.436-7.94
2018-03-225370.931,900,000,0000.195-4.68
2018-04-08161.01,900,000,0000.196-8.19
2018-04-10190.1691,000,0000.155-6.86
2018-04-182008 US20.081240,0000.253-6.56
2018-04-19N/A 4N/A10.0000N/A
N/A
2018-04-24360.12310,000,0000.687-6.63
2018-04-29190.16210,000,000-0.099-7.67
2018-04-3040.97710,000-1.705-6.18
2018-05-042008 LE220.14270,000,000-0.137-7.01
2018-05-0890.043210,000,0001.159-7.45
2018-05-17490.083480,000,0001.108-6.64
2018-06-022018 LA30.1610.000>0

2018-06-0350.045910,000-0.349-5.67
2018-06-0350.045670,0000.067-6.10
2018-06-0450.045340,000,0000.474-9.17
2018-06-21N/A 5N/A10.0000N/A
N/A
2018-06-221571.0500,000,000-0.333-5.62
2018-07-25N/A 3N/A10.0000N/A
N/A
2018-08-12161.0310,000,000-0.816-7.79
2018-08-194991.8560,000,0000.768-4.13
2018-08-30100.116,200,000,0002.277-9.63
2018-09-07100.11170,000,0001.084-7.95
2018-09-10100.1191,000,0000.297-7.56
2018-09-11100.11120,000,000-0.315-7.56
2018-09-11100.11710,000,000-1.258-8.14
2018-09-12100.11220,000,000-0.824-7.72
2018-09-12100.117,700,000,000-2.041-8.91
2018-09-12100.111,800,000,000-1.660-8.39
2018-09-13311.01,400,000,000-1.839-7.55
2018-09-18233.01,100,000,0001.918-7.98
2018-09-191571.0770,000,000-0.337-5.87
2018-09-20310.6014,000,0000.453-5.77
2018-09-25N/A 4N/A10.0000N/A
N/A
2018-09-261571.02,400,000,0000.029-6.09
2018-10-02370.9753,000,0000.328-6.08
2018-10-2220.0313,300,000,000-0.299-11.2
2018-10-27140.962,100,000,000-1.613-8.25
2018-10-28140.96500,000,000-0.177-7.92
2018-10-30140.968,300,000,0001.972-9.43
2018-11-012008 VL90.12710,000,0001.279-8.27
2018-11-1290.04377,000,000-0.297-7.79
2018-11-1290.043770,000,000-0.704-8.26
2018-11-1260.04656,000,0000.822-8.27
2018-11-1290.04332,000,0000.008-7.61
2018-11-1260.0461,900,000,0002.113-9.46
2018-11-1690.04367,000,0000.981-7.60
2018-11-16490.08310,000,000,0001.753-7.73
2018-11-20N/A 3N/A10.0000N/A
N/A
2018-11-29490.0831,300,000,0000.856-7.42
2018-12-112010 XC50.05840,000,000-0.250-8.27
2018-12-13511.92,000,000,0000.455-7.48
2018-12-14180.066710,000,0001.218-7.87
2018-12-14132.8830,000,0000.401-7.75
2018-12-15511.9450,000,000-0.856-6.64
2018-12-16132.8230,000,0000.147-7.53
2018-12-17? 1.4 N/A N/A N/A Not listed
2018-12-18132.891,000,000-0.252-7.51
2018-12-182311.41,000,000,000-0.262-5.14
2018-12-18N/A 12N/A10.0000N/A
N/A
2018-12-20511.93,400,000,000-1.991-7.29
2018-12-22132.8200,000,000-1.085-8.38
2018-12-232013 YB20.1617,000,0003.754-9.06
2018-12-2690.0713,200,000,000-0.855-9.74
2018-12-29190.162,800,000,0000.411-8.06
2018-12-30190.166,200,000,0000.502-8.22