Asteroids

2018XQ2 help

Last update: 2025-09-10 00:30 UTC

Orbital Properties

Epoch

61000.0

MJD

Orbit type

Aten

Perihelion (q)

0.704

Aphelion (Q)

1.009

Eccentricity (e)

0.178

Inclination (i)

0.1

deg

Orbit period (P)

289.4

Earth MOID

0.00008

U parameter

6.5

Next Earth close approach

Date

2037-11-26

Nominal distance (from Earth center)

0.01194

1786571

Maximum Brightness

19.6

mag

Risk

Object is in risk list

Physical Properties

Absolute Magnitude (H)

mag

Diameter

7 - 15*

Taxonomic type

Rotation period (T)

Discovery Information

Discovery Date

2018-12-10

Observatory

Mt. Lemmon Survey

ORBIT VISUALISATION TOOLS

External links

Proper elements

Epoch

Near present day

Near middle of observation arc

Orbit properties

Epoch
Semimajor Axis
Eccentricity (e)
Inclination (i)
Long. of Ascending Node (Ω)
Arg. of Perihelion (ω)
Mean Anomaly (M)
Perihelion distance
Aphelion distance
Asc. Node-Earth Sep.
Desc. Node-Earth Sep.
MOID
Orbit Period
U parameter

Value

1-sigma variation

Unit

Epoch

Value

61000.0000

1-sigma variation

Unit

MJD

Semimajor Axis

Value

0.856288

1-sigma variation

0.000035

Unit

Eccentricity (e)

Value

0.178015

1-sigma variation

0.000101

Unit

Inclination (i)

Value

0.0773

1-sigma variation

4.029E-5

Unit

Long. of Ascending Node (Ω)

Value

113.3282

1-sigma variation

0.0898

Unit

Arg. of Perihelion (ω)

Value

146.5296

1-sigma variation

0.0871

Unit

Mean Anomaly (M)

Value

90.88855

1-sigma variation

0.28953

Unit

Perihelion distance

Value

0.703856

1-sigma variation

Unit

Aphelion distance

Value

1.008720

1-sigma variation

Unit

Asc. Node-Earth Sep.

Value

-0.006138

1-sigma variation

Unit

Desc. Node-Earth Sep.

Value

-0.298078

1-sigma variation

Unit

MOID

Value

0.000076

1-sigma variation

Unit

Orbit Period

Value

289.4198

1-sigma variation

Unit

U parameter

Value

6.5

1-sigma variation

Unit

Covariance Matrix

	a	e	i	Ω	ω	M
a	1.19781E-9	-3.48261E-9	-1.38751E-9	3.10796E-6	-3.01500E-6	-1.00204E-5
e	-3.48261E-9	1.01256E-8	4.03421E-9	-9.03634E-6	8.76606E-6	2.91342E-5
i	-1.38751E-9	4.03421E-9	1.62310E-9	-3.60765E-6	3.49994E-6	1.16074E-5
Ω	3.10796E-6	-9.03634E-6	-3.60765E-6	8.06787E-3	-7.82667E-3	-2.60000E-2
ω	-3.01500E-6	8.76606E-6	3.49994E-6	-7.82667E-3	7.59269E-3	2.52224E-2
M	-1.00204E-5	2.91342E-5	1.16074E-5	-2.60000E-2	2.52224E-2	8.38271E-2

Date of computation: 2025-09-10 00:30 UTC

Note: The ASCII file is in a format suitable for Orbfit input.

Download ASCII file:

Physical properties

Rotation Period
Quality
Amplitude
Rotation Direction
Spinvector L
Spinvector B

Rotational properties

Value

Unit

Source

Rotation Period

Value

Unit

Source

[-]

Quality

Value

Unit

Source

[-]

Amplitude

Value

Unit

mag

Source

[-]

Rotation Direction

Value

Unit

Source

[-]

Spinvector L

Value

Unit

Source

[-]

Spinvector B

Value

Unit

Source

[-]

Taxonomy
Taxonomy (all)

Taxonomy

Value

Unit

Source

Taxonomy

Value

Unit

Source

[-]

Taxonomy (all)

Value

Unit

Source

[-]

Absolute Magnitude (H)
Slope Parameter (G)

H / G

Value

Unit

Source

Absolute Magnitude (H)

Value

27.991

Unit

mag

Source

[1]

Slope Parameter (G)

Value

0.15**

Unit

mag

Source

[1]

Albedo
Diameter

Size and albedo

Value

Unit

Source

Albedo

Value

0.05 - 0.25

Unit

Source

[2]

Diameter

Value

7 - 15*

Unit

Source

[2]

Color Index Information

Color Index Information

Value

Unit

Source

Color Index Information

Value

Unit

mag

Source

[-]

Sightings

Sightings

Value

Unit

Source

Sightings

Value

Unit

Source

[-]

Download this part as:

Sources

No.	Name	Additional
[1]	ESA Aegis	ESA orbit determination and impact monitoring system
[2]	Estimation	Estimated from absolute magnitude

Observational Information

Arc Length
Unobserved
Normalized RMS of residuals

Arc Information

Value

Unit

Source

Arc Length

Value

Unit

Source

[1]

Unobserved

Value

2479

Unit

Source

[1]

Normalized RMS of residuals

Value

0.691428

Unit

Source

[1]

Astrometry Summary

First Observation
Last Observation
Total Optical Observations (Discarded)

Optical

Value

Unit

Source

First Observation

Value

2018-12-10.2423

Unit

Source

[2]

Last Observation

Value

2019-01-07.067641

Unit

Source

[2]

Total Optical Observations (Discarded)

Value

44 (0)

Unit

Source

[1]

Radar Summary

First Observation
Last Observation
Delay (Discarded)
Doppler (Discarded)
Total Optical Observations (Discarded)

Radar

Value

Unit

Source

First Observation

Value

Unit

Source

[-]

Last Observation

Value

Unit

Source

[-]

Delay (Discarded)

Value

0 (0)

Unit

Source

[-]

Doppler (Discarded)

Value

0 (0)

Unit

Source

[-]

Total Radar Observations (Discarded)

Value

0 (0)

Unit

Source

[-]

Note: The ASCII file is in a format suitable for Orbfit input.

Sources

No.	Name	Additional
[1]	ESA Aegis	ESA orbit determination and impact monitoring system
[2]	MPC	Minor Planet Center: https://www.minorplanetcenter.net

Computation parameters

As seen from:

Initial Date: *

Final Date: *

Output option:

One line per time step

Time step:*

* - these fields are required

Close Approaches for 2018XQ2 from 1950 to 2125

Body	Date in UTC	Time uncert. in min	Nominal distance in au	Min. possible distance in au	Distance uncert. in au
EARTH	1954-01-04 09:22	> 1 mo	0.0116227	0.0008535	1.8918180
EARTH	1957-12-06 06:08	> 1 mo	0.0222586	0.0006604	1.4500634
VENUS	1960-09-13 10:14	> 1 mo	0.0460803	0.0284434	0.4068957
EARTH	1961-11-25 21:09	> 1 mo	0.0132224	0.0007384	0.8415289
EARTH	1966-01-10 10:02	> 1 mo	0.0171204	0.0004585	0.2141433
EARTH	1980-11-09 08:24	1002.0	0.0982094	0.0011508	0.0735819
EARTH	1985-01-10 20:54	> 1 d	0.0187928	0.0004833	0.0133870
VENUS	1994-01-19 18:35	> 1 d	0.0354108	0.0279108	0.0081954
EARTH	1995-11-12 02:41	1228.2	0.0509733	0.0039596	0.0156922
EARTH	1996-03-10 14:10	> 1 w	0.1893972	0.1589748	0.0101409
VENUS	1999-07-26 09:34	> 1 d	0.0245897	0.0239544	0.0013490
EARTH	2000-01-17 08:40	23.8	0.0957276	0.0736149	0.0073709
VENUS	2005-02-13 16:23	> 1 d	0.0319987	0.0265121	0.0035986
EARTH	2014-11-09 22:15	36.7	0.1258702	0.1183661	0.0025014
EARTH	2018-12-06 20:32	< 1 min	0.0235495	0.0235126	0.0000123
EARTH	2023-01-17 01:47	38.0	0.1211515	0.1136185	0.0025110
VENUS	2029-08-03 13:39	1006.9	0.0472465	0.0327146	0.0051889
VENUS	2035-02-16 03:10	24.5	0.0456294	0.0452892	0.0001137
EARTH	2037-11-26 11:00	> 1 d	0.0119425	0.0087642	0.0010609
EARTH	2048-11-10 23:30	> 1 d	0.0386159	0.0013605	0.0252961
EARTH	2049-03-01 21:45	> 1 mo	0.1805525	0.1232314	0.0191071
VENUS	2049-05-26 16:02	> 1 w	0.0258641	0.0251298	0.0045644
EARTH	2053-01-14 06:44	678.2	0.1483598	0.1030366	0.0151088
VENUS	2054-11-12 04:12	> 1 d	0.0223418	0.0207620	0.0032621
VENUS	2060-05-07 12:55	928.1	0.0373602	0.0259303	0.0045836
EARTH	2063-11-12 18:56	> 1 d	0.0251673	0.0040950	0.0072143
EARTH	2068-01-15 12:12	963.7	0.1180572	0.0781242	0.0133110
EARTH	2078-11-10 05:58	1117.7	0.1429984	0.0206650	0.0408118
EARTH	2083-01-12 18:16	> 1 d	0.0317346	0.0009027	0.0371171
EARTH	2093-11-14 13:19	> 1 mo	0.0193007	0.0025460	0.1790997
EARTH	2098-01-16 22:52	> 1 d	0.0726596	0.0000449	0.8814721
EARTH	2112-11-11 23:18	> 1 mo	0.1682647	0.0028548	1.4890189
EARTH	2116-12-03 06:20	> 1 mo	0.0181224	0.0027094	0.4447744
EARTH	2121-01-15 18:20	> 1 mo	0.1728016	0.0017708	2.4713493

Download as:

Stationary Points

Ecc. an. ast.	Ecc. an. Earth	Distance in au	Classification
213.29062733	5.57156935	0.00004702	MINIMUM
150.34541982	313.36407098	0.00108062	MINIMUM
181.76627086	339.41749411	0.02398387	SADDLE
2.52895059	160.19053647	0.31131964	SADDLE
2.46115912	340.12176626	1.68860093	SADDLE
181.82630708	159.47671016	2.02389341	MAXIMUM

Download:

MOID Plots

Click on the images to zoom-in and zoom-out

Level lines of the squared distance function

2018XQ2

Date in UTC	MJD	σ	σ_imp	Distance ± Width in RE	Stretching in RE	IP	Impact energy	PS
2068-01-09.465	76389.465	-1.458	0.000	0.56 ± 0.002	3.50E5	2.33E-6	1.17E-2	-7.30
2068-01-09.521	76389.521	-3.263	0.000	2.76 ± 0.002	4.56E5	1.01E-8	1.18E-2	-9.66
2072-01-09.046	77850.046	-1.458	0.000	0.81 ± 0.008	1.53E7	5.21E-8	1.17E-2	-8.98
2078-11-06.935	80343.935	-1.730	1.308	3.11 ± 0.008	1.81E6	1.26E-9	1.17E-2	-10.66
2079-01-07.899	80405.899	-3.258	0.000	1.07 ± 0.002	4.60E5	2.48E-8	1.16E-2	-9.37
2080-01-01.880	80764.880	1.254	0.000	1.08 ± 0.000	3.49E6	3.34E-7	1.14E-2	-8.25
2080-11-26.888	81094.888	-1.694	0.000	2.74 ± 0.007	2.63E6	1.14E-7	1.16E-2	-8.72
2082-01-08.937	81502.937	-1.490	0.000	0.52 ± 0.200	1.42E7	5.59E-8	1.17E-2	-9.03
2083-01-08.953	81867.953	-1.590	0.000	1.69 ± 0.022	1.45E8	3.99E-9	1.17E-2	-10.19
2085-01-07.587	82597.587	-1.510	0.000	0.47 ± 0.000	5.33E8	1.45E-9	1.17E-2	-10.64
2091-01-06.279	84787.279	-1.135	0.000	0.72 ± 0.001	6.94E3	1.82E-4	1.16E-2	-5.58
2091-01-06.364	84787.364	-1.033	0.000	0.59 ± 0.001	6.44E3	2.19E-4	1.16E-2	-5.50
2091-01-06.420	84787.420	-0.977	0.000	1.37 ± 0.001	1.30E4	1.04E-4	1.17E-2	-5.82
2091-01-06.575	84787.575	-3.657	0.000	2.91 ± 0.001	6.68E3	3.21E-7	1.17E-2	-8.34
2091-01-06.590	84787.590	-3.638	0.000	2.56 ± 0.001	5.00E3	3.75E-7	1.17E-2	-8.27
2092-01-05.584	85151.584	-1.035	0.000	1.06 ± 0.003	2.37E7	5.68E-8	1.17E-2	-9.09
2093-01-10.099	85522.099	1.326	0.000	2.21 ± 0.002	1.99E6	3.57E-7	1.17E-2	-8.30
2094-01-04.984	85881.984	-1.139	0.000	1.24 ± 0.002	2.75E6	4.30E-7	1.16E-2	-8.23
2094-01-05.041	85882.041	-1.028	0.000	2.25 ± 0.000	1.83E6	7.45E-7	1.16E-2	-7.99
2095-01-05.470	86247.470	-1.112	0.000	0.25 ± 0.000	7.84E5	1.68E-6	1.16E-2	-7.64
2095-01-05.528	86247.528	-1.060	0.000	0.97 ± 0.002	1.08E5	1.25E-5	1.17E-2	-6.77
2095-01-05.618	86247.618	-0.968	0.000	2.31 ± 0.001	7.66E5	1.40E-6	1.17E-2	-7.72
2095-01-05.630	86247.630	-0.968	0.000	2.17 ± 0.001	7.37E5	1.47E-6	1.16E-2	-7.70
2095-01-05.652	86247.652	-0.968	0.000	2.56 ± 0.001	6.88E5	1.60E-6	1.17E-2	-7.66
2095-01-05.664	86247.664	-3.538	0.000	3.05 ± 0.001	3.14E5	4.40E-9	1.16E-2	-10.22
2095-01-05.755	86247.755	-3.614	0.000	1.98 ± 0.001	2.64E5	1.03E-8	1.17E-2	-9.86
2095-01-05.936	86247.936	-1.352	0.000	2.93 ± 0.001	1.88E6	1.82E-7	1.16E-2	-8.61
2098-01-06.231	87344.231	-1.147	0.000	1.65 ± 0.000	8.19E5	1.51E-6	1.17E-2	-7.70
2098-01-06.414	87344.414	-1.011	0.000	2.21 ± 0.001	2.65E5	3.76E-6	1.17E-2	-7.31
2098-01-06.421	87344.421	-0.991	0.000	2.84 ± 0.001	3.52E5	2.31E-6	1.17E-2	-7.52
2098-01-09.279	87347.279	-4.234	0.000	2.99 ± 0.001	9.33E5	3.24E-10	1.16E-2	-11.38
2100-01-05.522	88073.522	-1.128	0.000	0.30 ± 0.001	3.32E6	3.90E-7	1.16E-2	-8.31
2100-01-05.609	88073.609	-1.043	0.000	1.20 ± 0.001	5.05E6	2.59E-7	1.17E-2	-8.48
2100-01-05.693	88073.693	-0.973	0.000	2.03 ± 0.000	1.36E7	8.35E-8	1.17E-2	-8.97
2100-01-05.735	88073.735	-1.036	0.000	1.11 ± 0.000	6.56E7	2.03E-8	1.17E-2	-9.59
2100-01-05.842	88073.842	-3.628	0.000	1.53 ± 0.001	5.05E6	5.79E-10	1.17E-2	-11.13
2101-01-06.004	88439.004	-1.133	0.000	0.36 ± 0.506	1.73E8	7.32E-9	1.16E-2	-10.04
2102-01-06.729	88804.729	-1.165	0.000	1.37 ± 0.001	4.73E5	2.37E-6	1.16E-2	-7.53
2102-01-07.231	88805.231	-1.342	0.000	0.83 ± 0.000	1.02E6	9.49E-7	1.17E-2	-7.93
2102-01-09.918	88807.918	0.361	0.000	2.14 ± 0.001	1.35E5	1.32E-5	1.16E-2	-6.79
2102-11-18.005	89120.005	1.586	0.000	2.08 ± 0.000	3.05E6	1.72E-7	1.16E-2	-8.68
2103-01-04.721	89167.721	-1.481	0.000	2.46 ± 0.004	5.24E6	9.83E-8	1.16E-2	-8.92
2103-12-31.213	89528.213	-0.542	0.000	2.57 ± 0.000	4.35E7	2.88E-8	1.16E-2	-9.46
2104-01-05.936	89533.936	-1.137	0.000	2.14 ± 0.000	9.17E6	1.10E-7	1.15E-2	-8.88
2104-01-06.528	89534.528	-1.037	0.000	1.62 ± 0.011	4.31E7	2.86E-8	1.16E-2	-9.46
2104-01-06.975	89534.975	-1.045	0.000	0.40 ± 0.002	3.24E6	4.34E-7	1.17E-2	-8.28
2105-01-01.888	89895.888	-0.634	0.000	1.21 ± 0.000	1.05E8	1.85E-8	1.16E-2	-9.66
2106-12-31.066	90624.066	-2.937	0.000	2.56 ± 0.155	1.52E8	1.47E-10	1.15E-2	-11.77
2107-01-06.612	90630.612	-1.025	0.000	2.87 ± 0.000	3.75E6	1.48E-7	1.17E-2	-8.76
2107-12-30.516	90988.516	0.995	0.000	3.25 ± 0.002	1.43E6	4.49E-7	1.14E-2	-8.29
2107-12-31.146	90989.146	0.897	0.000	1.49 ± 0.002	2.06E6	7.79E-7	1.14E-2	-8.05
2108-01-01.120	90990.120	0.569	0.000	0.80 ± 0.002	3.47E5	6.31E-6	1.15E-2	-7.14
2108-12-31.761	91355.761	-1.137	0.000	2.47 ± 0.000	7.69E6	1.14E-7	1.17E-2	-8.89
2109-01-03.495	91358.495	-1.041	0.000	1.08 ± 0.017	5.97E7	2.25E-8	1.16E-2	-9.59
2109-01-04.935	91359.935	2.170	0.000	0.96 ± 0.001	4.34E6	5.05E-8	1.17E-2	-9.24
2109-01-04.941	91359.941	3.678	0.000	1.52 ± 0.001	2.90E6	8.52E-10	1.17E-2	-11.01
2109-01-06.430	91361.430	-1.154	0.000	0.84 ± 0.001	4.15E5	2.94E-6	1.17E-2	-7.48
2109-01-09.141	91364.141	-0.432	0.000	2.28 ± 1.432	3.77E8	3.67E-9	1.16E-2	-10.38
2110-01-06.290	91726.290	-1.026	0.000	2.83 ± 0.002	3.60E6	1.60E-7	1.17E-2	-8.74
2110-01-08.079	91728.079	-0.510	0.000	2.88 ± 0.002	1.98E5	4.97E-6	1.15E-2	-7.26
2110-01-08.533	91728.533	-4.027	0.000	1.89 ± 0.002	3.30E5	1.85E-9	1.16E-2	-10.68
2110-01-08.860	91728.860	-0.460	0.000	0.61 ± 0.003	4.67E4	4.80E-5	1.16E-2	-6.27
2110-01-08.862	91728.862	-0.465	0.000	0.59 ± 0.002	5.25E4	4.26E-5	1.15E-2	-6.32
2110-01-08.881	91728.881	-0.511	0.000	2.24 ± 0.002	4.42E5	3.77E-6	1.16E-2	-7.37
2110-01-14.077	91734.077	-2.096	0.000	2.90 ± 0.002	1.29E6	6.88E-8	1.17E-2	-9.11
2111-01-05.741	92090.741	1.181	0.000	2.00 ± 0.000	5.09E7	1.95E-8	1.16E-2	-9.67
2111-01-08.026	92093.026	-0.461	0.000	1.85 ± 0.127	5.57E7	4.07E-8	1.16E-2	-9.35
2112-01-04.409	92454.409	-1.002	0.000	3.02 ± 0.001	3.93E5	4.80E-7	1.17E-2	-8.28
2112-01-04.410	92454.410	-0.998	0.000	3.03 ± 0.001	4.30E5	4.55E-7	1.17E-2	-8.30
2113-01-05.839	92821.839	-1.128	0.000	0.32 ± 0.000	1.59E8	8.12E-9	1.17E-2	-10.05
2113-01-07.478	92823.478	-0.467	0.000	1.06 ± 0.002	6.27E6	3.41E-7	1.16E-2	-8.43
2114-01-04.058	93185.058	-0.664	0.000	2.04 ± 0.000	1.04E7	1.38E-7	1.17E-2	-8.83
2114-01-04.378	93185.378	-3.528	0.000	2.52 ± 0.002	2.27E6	1.40E-9	1.16E-2	-10.82
2114-01-11.787	93192.787	-1.633	0.000	0.08 ± 0.000	3.85E7	1.65E-8	1.17E-2	-9.75
2115-01-01.801	93547.801	3.488	0.000	1.32 ± 0.001	2.21E5	2.32E-8	1.16E-2	-9.61
2116-01-02.104	93913.104	-0.557	0.000	2.16 ± 0.000	3.42E7	4.69E-8	1.16E-2	-9.31
2116-01-08.407	93919.407	-0.464	0.000	2.80 ± 0.000	1.67E7	1.36E-7	1.15E-2	-8.85
2116-01-10.993	93921.993	0.901	0.000	0.66 ± 0.011	2.16E6	7.81E-7	1.16E-2	-8.09
2117-01-06.391	94283.391	-1.204	0.000	2.22 ± 0.002	8.42E5	9.81E-7	1.16E-2	-7.99
2117-01-07.613	94284.613	-0.464	0.000	1.37 ± 0.089	4.88E7	4.38E-8	1.16E-2	-9.34
2117-01-08.765	94285.765	-1.046	0.000	2.35 ± 0.000	2.32E7	3.65E-8	1.18E-2	-9.42
2117-01-11.530	94288.530	0.338	0.000	1.49 ± 0.002	1.71E6	1.22E-6	1.16E-2	-7.90
2117-01-11.536	94288.536	0.338	0.000	1.43 ± 0.002	1.60E6	1.31E-6	1.16E-2	-7.87
2118-01-06.238	94648.238	-0.734	0.000	2.18 ± 0.000	1.17E7	1.45E-7	1.17E-2	-8.82
2118-01-07.931	94649.931	-0.461	0.000	0.86 ± 0.253	9.63E7	2.32E-8	1.16E-2	-9.62
2120-12-31.679	95738.679	1.779	0.000	1.76 ± 0.000	3.70E6	1.15E-7	1.16E-2	-8.94
2121-01-08.482	95746.482	-1.195	0.000	0.44 ± 0.016	1.41E6	8.22E-7	1.17E-2	-8.08
2121-01-08.651	95746.651	-3.470	0.000	2.43 ± 0.002	3.41E5	1.04E-8	1.17E-2	-9.98
2121-01-08.815	95746.815	-1.331	0.000	1.52 ± 0.003	3.20E5	3.07E-6	1.17E-2	-7.51
2121-01-08.840	95746.840	-1.331	0.000	0.51 ± 0.000	5.53E5	1.78E-6	1.17E-2	-7.75
2121-01-08.852	95746.852	-1.331	0.000	0.53 ± 0.005	9.32E5	1.05E-6	1.17E-2	-7.98
2121-01-08.891	95746.891	-3.388	0.000	2.96 ± 0.002	4.83E5	2.21E-9	1.17E-2	-10.65
2121-01-11.284	95749.284	0.338	0.000	1.38 ± 0.001	1.17E7	1.81E-7	1.16E-2	-8.74
2121-12-28.934	96100.934	0.574	0.000	3.00 ± 0.000	6.34E6	2.48E-7	1.15E-2	-8.61
2122-01-12.775	96115.775	-1.032	0.000	1.76 ± 0.358	4.93E7	2.38E-8	1.16E-2	-9.63


Based on 44 optical observations (of which 0 are rejected as outliers) from 2018/12/10.242 to 2019/01/07.068.
Coordinates are given on the Target Plane.
Unit is one Earth radius, but impact cross section has radius between 2.99 and 3.12 Earth radii.
Coordinates for LOV = EQU scaled= 1 second= F.
AstOD software version= 4.0, Date of computation=20250805 130500.123 UTC.

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