List of asteroid close approaches to Earth in 2019


Time of discovery of asteroids which came closer to Earth than the Moon in 2019

, a binary system asteroid, which came within 15 lunar distances in May 2019
Below is the list of asteroid close approaches to Earth in 2019.

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 2019. 2019 has been a notable year in that an asteroid was detected prior to impact. This has only happened three times previously. In addition, for the first year ever, four close approaches of previously undiscovered asteroids were successfully predicted over a week in advance.
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. A number of known asteroids came closer than this in 2019, notably including 2019 MO which was detected a few hours before it impacted, only the fourth asteroid impact in history to have been successfully predicted in advance.
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
2019-01-082019-01-080.0390.7–2.532.3—
2019-01-122019-01-110.268–2527.2—
2019-01-122019-01-16P10LI6O0.903–1828.6?
2019-01-162019-01-170.185–1828.0—
2019-01-172019-01-16P10LGkb0.0881–331.6—
2019-01-242019-01-250.353–1428.7—
2019-01-272019-01-28C04U1L20.602–1229.4?
2019-01-272019-01-280.134–1228.7—
2019-02-092019-02-09C03CZA10.689–3026.9—
2019-02-112019-02-120.316–1927.8—
2019-02-262019-02-280.614–1428.5—
2019-02-262019-02-260.472–829.7—
2019-03-012019-03-010.0612–630.1—
2019-03-042019-03-05C09Q4H20.0691–331.9—
2019-03-042019-03-04C04H9310.545–1928.0?
2019-03-132019-03-14ZTF02sM0.866–2127.6—
2019-03-222019-03-090.8014–4425.9—
2019-03-232019-03-250.8610–2327.1—
2019-03-282019-03-290.2720–4525.6?
2019-03-312019-03-290.874.6–1028.8?
2019-03-312019-04-030.933.0–6.629.8?
2019-04-042020-02-150.0341.9–3.531.7—
2019-04-122019-04-090.9814–3126.4?
2019-04-182019-04-090.5713–3026.5?
2019-04-202019-04-210.5812–2826.7?
2019-04-302019-05-010.696.7–1528?
2019-05-022019-05-030.474.0–8.929.1?
2019-05-052019-05-060.383.2–7.229.6?
2019-05-162019-05-140.193.1–7.029.6?
2019-05-282019-05-260.8513–2926.6?
2019-06-062019-06-060.227.3–1627.8?
2019-06-082019-06-020.659.3–2127.3?
2019-06-222019-06-22ImpactImpact3–1029.3?
2019-07-022019-07-040.692.6–5.730.1?
2019-07-092019-06-290.8216–3526.2?
2019-07-092019-07-090.986.4–1428.1?
2019-07-102019-07-070.8329–6624.8?
2019-07-242019-07-210.9354–12023.5?
2019-07-252019-07-240.1959–13023.3?
2019-07-282019-07-270.4911–2526.9?
2019-07-292019-07-300.567.4–1627.8?
2019-08-202019-08-220.328.7–2027.4?
2019-08-202019-08-210.132.2–5.030.4?
2019-08-222019-08-210.784.7–1128.8?
2019-08-262019-08-280.806.6–1528?
2019-08-262019-08-270.253.7–8.229.3?
2019-09-022019-09-030.292.1–4.630.6?
2019-09-052019-09-060.107.3–1627.8?
2019-09-072019-09-050.484.6–1028.8?
2019-09-162019-09-190.648.3–1927.5?
2019-09-212019-09-220.192.6–5.830.1?
2019-09-212019-09-200.735.5–1228.4?
2019-09-212019-09-220.302.0–4.430.7?
2019-09-222019-09-250.7315–3426.2?
2019-09-282019-09-300.994.3–9.728.9?
2019-09-282019-10-010.936.8–1528?
2019-09-292019-10-010.343.9–8.729.2?
2019-10-012019-09-300.413.8–8.629.2?
2019-10-032019-09-220.9714–3126.4?
2019-10-052019-10-060.325.5–1228.4?
2019-10-182019-10-190.592.2–5.030.4?
2019-10-182019-10-190.846.3–1428.1?
2019-10-192019-10-220.775.9–1328.3?
2019-10-232019-10-250.933.1–6.929.7?
2019-10-252019-10-260.413.7–8.329.3?
2019-10-262019-10-290.994.8–1128.7?
2019-10-272019-10-280.446.3–1428.1?
2019-10-292019-10-26
0.504.3–9.728.9?
2019-10-312019-10-310.031.0–2.232.1?
2019-11-012019-10-290.5512–2826.7?
2019-11-022019-11-010.285.8–1328.3?
2019-11-042019-11-010.458.7–2027.4?
2019-11-042019-11-030.356.4–1428.1?
2019-11-062019-11-060.369.2–2127.3?
2019-11-092019-11-080.381.2–2.731.7?
2019-11-092019-11-050.498.1–1827.6?
2019-11-192019-11-180.2215–3526.2?
2019-11-192019-11-240.726.2–1428.2?
2019-11-232019-11-240.4727–6025?
2019-11-302019-11-290.855.5–1228.4?
2019-12-182019-12-170.443.1–7.029.7?
2019-12-182019-12-190.171.3–3.031.5?
2019-12-232019-12-240.268.9–2027.4?
2019-12-252019-12-300.989.3–2127.3?

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 30 and greater

Abs Magnitude 29-30
Absolute Magnitude 28-29
Absolute Magnitude 27-28
Absolute Magnitude 26-27
Absolute Magnitude 25-26
Greater than Absolute Magnitude 25

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
2019-01-040.9610–4326.31.43
2019-01-070.410.7–2.532.20.039
2019-01-150.865–1828.00.18
2019-01-250.523–1428.70.35
2019-01-270.914–1228.70.13
2019-02-10C03CZA10.939–3026.90.68
2019-02-110.706–1927.80.31
2019-02-110.9812–4526.11.42
2019-02-260.9415–5125.61.89
2019-02-260.875–1828.01.32
2019-02-272019 DF0.662–829.70.47
2019-03-010.722–630.10.061
2019-03-04C09Q4H20.9981–331.90.069

Additional examples

An example list of near-Earth asteroids that passed more than 1 lunar distance from Earth in 2019.
ObjectSize
meters		lunar
distances		DateRef
'2152019-01-07
252019-03-04
162019-04-04 ± 5
1112019-05-12
1998 OH16632019-05-16
192019-05-17
66391 Moshup13172019-05-25
2282019-06-24
252019-07-07 ± 6
1382019-07-26
112019-08-07 ± 5
28642019-08-25
'1152019-08-28
1620 Geographos25602019-08-31
92019-09-09 ± 9
2100 Ra-Shalom23002019-09-21
1642019-12-06 ± 7

Virtual impactors

Listed are asteroids that are included on the Sentry Risk Table because they have short observation arcs with poorly constrained orbits and have a chance of striking Earth in 2019. 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 October 2019 around the time of the virtual impact.
Cumulatively among the asteroids listed below, there is a roughly 1 in 16,500 chance that any of the asteroids will impact Earth in 2019. Most of this comes from asteroid which formerly had a 1 in 20,000 chance of impact on 9 September 2019, but the impact was ruled out in August.
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
2019-01-0680–2601.1710,000,000-2.461-5.51
2019-01-06459–4972.7210,000,000-2.004-4.32
2019-01-0715–475.9 N/A N/A N/A
2019-01-08309–3210.60220,000,000-4.057-6.94
2019-01-106–200.07136,000,000-1.475-7.80
2019-01-1010–350.164,200,000,000-3.197-8.22
2019-01-11309–3210.604,200,000,000-2.874-6.91
2019-01-11309–3210.602,900,000,000-2.297-6.52
2019-01-113–120.05817,000,000-1.593-7.91
2019-01-2010–350.161,400,000,000-3.137-9.15
2019-02-01N/A 4N/A10.0000N/A
N/A
2019-02-0792–3001.01,100,000,000-0.900-5.81
2019-02-155–160.043290,000,0000.751-8.30
2019-02-157–230.1862,000,000-2.603-7.84
2019-02-187–230.18280,000,000-2.921-8.34
2019-02-18N/A N/A
2019-02-2014–590.12260,000,000-2.901-8.73
2019-02-226–200.0711,500,000-0.914-6.47
2019-02-286–200.0714,300,000-1.271-6.90
2019-03-013–80.0401,400,000,0001.826-9.38
2019-03-026–200.0718,300,000-1.469-7.14
2019-03-023–80.040830,000,0002.221-9.34
2019-03-036–200.07145,000,000-2.055-7.80
2019-03-036–200.07116,000,000-1.712-7.41
2019-03-033–80.040200,000,0001.940-8.93
2019-03-033–80.04071,000,0001.771-8.70
2019-03-045–160.043130,000,0001.257-7.96
2019-03-096–200.0715,000,000,0003.289-8.75
2019-03-106–200.071830,000,0002.871-8.09
2019-03-106–200.07191,000,0002.767-7.53
2019-03-117–220.116,700,0001.207-6.51
2019-03-117–220.11480,0000.652-5.47
2019-03-126–200.0713,600,0001.085-6.47
2019-03-127–220.1111,000,0001.823-6.94
2019-03-147–220.11830,000,0002.905-8.91
2019-04-0310–331.0590,000,0002.345-8.13
2019-04-03220–7100.942,100,000,0000.441-4.95
2019-04-0910–331.06,200,000,0003.011-8.98
2019-04-182008 US1–40.08143,000,000-1.780-9.20
2019-04-182008 US1–40.081710,000-1.526-7.39
2019-04-297–280.1891,000,0001.988-6.92
2019-05-0110–350.16310,000,000-2.900-8.79
2019-05-0416–400.9591,000,000-3.804-7.23
2019-05-075–160.043260,000,0001.252-7.82
2019-05-21N/A N/A
2019-06-033–100.045400,000-0.302-5.66
2019-06-033–100.04525,000,0002.025-7.89
2019-06-043–100.045480,000,0003.015-9.33
2019-06-043–100.045670,0000.351-6.63
2019-06-043–100.0451,500,0000.855-7.12
2019-06-1292–3001.01,200,000,0000.518-6.13
2019-06-2260.09510.000>0

2019-07-0728–900.9659,000,000-3.714-6.25
2019-07-075–170.043590,000,0000.765-7.85
2019-07-1353–2500.871,700,000,000-2.219-6.56
2019-07-215–160.12260,000,0003.036-8.26
2019-08-19270–8601.8710,000,0000.809-4.47
2019-08-3018–571.0450,000,000-1.745-7.54
2019-09-077–220.11220,000,0002.279-8.32
2019-09-0918–599.920,0002.894-3.32
2019-09-117–220.11830,000,000-1.445-8.40
2019-09-127–220.11710,000,000-0.811-8.51
2019-09-127–220.11110,000,000-0.815-7.72
2019-09-137–220.11310,000,000-1.036-8.06
2019-09-137–220.112,400,000,000-1.783-8.73
2019-09-2092–3001.07,700,000,0000.093-6.63
2019-09-2218–570.6030,000,0001.308-6.31
2019-09-2392–3001.07,700,000,000-2.410-6.99
2019-10-03210–6801.211,000,000-1.652-3.17
2019-10-0713–410.101,600,000,0003.550-8.39
2019-10-0992–3001.0340,000,000-0.355-5.78
2019-10-118–260.02742,000,0002.475-7.08
2019-10-278–260.969,100,000,000-3.524-9.07
2019-10-288–260.96910,000,000-3.002-8.30
2019-10-282008 VL6–220.121,500,000,000-3.610-9.35
2019-10-298–260.96770,000,000-3.196-8.45
2019-11-0111–310.06438,000,000-0.745-7.29
2019-11-1013–410.04612,000,000-2.326-7.86
2019-11-1213–410.04615,000,000-2.088-8.00
2019-11-125–160.043430,000,000-1.453-8.42
2019-11-1313–410.04656,000,000-2.556-8.41
2019-11-1313–410.0464,000,000,0003.632-10.1
2019-11-145–160.04329,000,0000.995-7.78
2019-11-1629–870.0835,600,000,0003.255-7.62
2019-11-165–160.043100,000,0001.284-7.90
2019-11-1729–870.0831,100,000,0002.834-7.02
2019-11-198–250.087910,000,0004.019-8.84
2019-11-2110–310.171,800,000,000-2.868-8.06
2019-11-23180–5900.96290,000,0001.115-4.27
2019-11-2312–390.13280,000,000-0.878-7.81
2019-12-068–250.087200,000,000-2.287-7.98
2019-12-0610–310.17220,000,0002.469-7.72
2019-12-083–120.0585,900,000,0003.630-10.2
2019-12-093–120.058710,000,0003.253-9.51
2019-12-1429–870.08353,000,0001.138-6.32
2019-12-1511–346.8 0 N/A N/A
2019-12-1511–346.8 0 N/A N/A
2019-12-169–300.066120,000,0001.760-7.51
2019-12-1711–346.8 0 N/A N/A
2019-12-1828–1301.95,300,000,0003.220-8.03
2019-12-1828–1301.9500,000,000-2.460-6.84
2019-12-1828–1301.91,300,000,000-2.461-7.25
2019-12-1911–346.8 0 N/A N/A
2019-12-2411–346.8 0 N/A N/A
2019-12-258–250.087260,000,0003.252-8.39
2019-12-2668–2100.76590,000,0002.440-6.39
2019-12-281000–31003.31,400,000,000-0.862-3.38Not listed
2019-12-2892–3001.0450,000,000-0.451-5.91
2019-12-2910–350.163,300,000,0002.902-8.39