Asteroids

2020WM help

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

Orbital Properties

Epoch

61000.0

MJD

Orbit type

Aten

Perihelion (q)

0.470

Aphelion (Q)

1.124

Eccentricity (e)

0.410

Inclination (i)

3.4

deg

Orbit period (P)

259.9

Earth MOID

0.01003

U parameter

6.5

Next Earth close approach

Date

2025-11-24

Nominal distance (from Earth center)

0.0445

6657066

Maximum Brightness

22.7

mag

Risk

Object is not in risk list

Physical Properties

Absolute Magnitude (H)

mag

Diameter

27 - 60*

Taxonomic type

Rotation period (T)

Discovery Information

Discovery Date

2020-11-17

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

0.797104

1-sigma variation

0.000030

Unit

Eccentricity (e)

Value

0.409924

1-sigma variation

0.000154

Unit

Inclination (i)

Value

3.4251

1-sigma variation

0.0023

Unit

Long. of Ascending Node (Ω)

Value

71.5167

1-sigma variation

0.0059

Unit

Arg. of Perihelion (ω)

Value

133.2508

1-sigma variation

0.0138

Unit

Mean Anomaly (M)

Value

253.41105

1-sigma variation

0.07738

Unit

Perihelion distance

Value

0.470352

1-sigma variation

Unit

Aphelion distance

Value

1.123857

1-sigma variation

Unit

Asc. Node-Earth Sep.

Value

-0.063238

1-sigma variation

Unit

Desc. Node-Earth Sep.

Value

-0.498162

1-sigma variation

Unit

MOID

Value

0.010032

1-sigma variation

Unit

Orbit Period

Value

259.9388

1-sigma variation

Unit

U parameter

Value

6.5

1-sigma variation

Unit

Covariance Matrix

	a	e	i	Ω	ω	M
a	9.04262E-10	4.62376E-9	6.87153E-8	1.76290E-7	-4.15695E-7	2.32676E-6
e	4.62376E-9	2.36440E-8	3.51391E-7	9.01348E-7	-2.12555E-6	1.18975E-5
i	6.87153E-8	3.51391E-7	5.22262E-6	1.33935E-5	-3.15872E-5	1.76814E-4
Ω	1.76290E-7	9.01348E-7	1.33935E-5	3.43783E-5	-8.10484E-5	4.53607E-4
ω	-4.15695E-7	-2.12555E-6	-3.15872E-5	-8.10484E-5	1.91104E-4	-1.06963E-3
M	2.32676E-6	1.18975E-5	1.76814E-4	4.53607E-4	-1.06963E-3	5.98701E-3

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

24.968

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

27 - 60*

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

1807

Unit

Source

[1]

Normalized RMS of residuals

Value

0.550058

Unit

Source

[1]

Astrometry Summary

First Observation
Last Observation
Total Optical Observations (Discarded)

Optical

Value

Unit

Source

First Observation

Value

2020-11-16.396047

Unit

Source

[2]

Last Observation

Value

2020-11-26.082405

Unit

Source

[2]

Total Optical Observations (Discarded)

Value

117 (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 2020WM 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
MERCURY	1953-06-30 07:45	> 1 mo	0.0326808	0.0198266	0.0899207
EARTH	1953-09-15 07:26	> 1 w	0.0629154	0.0576003	0.0694333
EARTH	1958-10-06 23:35	> 1 mo	0.1273180	0.0801603	0.0420080
EARTH	1963-11-04 13:17	> 1 w	0.1173418	0.0111352	0.0444221
VENUS	1966-05-17 22:50	> 1 d	0.0381915	0.0010284	0.1049974
MERCURY	1967-09-15 16:43	> 1 w	0.0330858	0.0196255	0.0230965
EARTH	1968-11-23 09:13	1245.7	0.0122459	0.0114703	0.0069358
EARTH	1973-11-22 23:10	46.2	0.1487770	0.1351823	0.0045335
VENUS	1975-08-11 07:20	118.6	0.0122829	0.0046963	0.0025806
EARTH	1975-09-13 20:30	35.6	0.1222809	0.1168606	0.0018210
VENUS	1978-12-15 13:44	331.9	0.0335432	0.0164510	0.0057166
EARTH	1980-09-12 14:33	61.0	0.0664524	0.0614379	0.0020780
MERCURY	1983-05-09 04:13	> 1 d	0.0331537	0.0291327	0.0017951
EARTH	1985-09-14 23:40	437.9	0.0634537	0.0596218	0.0017296
EARTH	1990-09-21 03:30	1085.4	0.0913828	0.0826774	0.0030238
EARTH	1995-09-29 09:01	962.6	0.1152399	0.1106051	0.0015589
EARTH	2000-10-09 04:41	228.7	0.1325677	0.1315883	0.0003268
MERCURY	2001-03-04 14:52	187.8	0.0337191	0.0331298	0.0002015
EARTH	2005-10-20 04:07	728.8	0.1369236	0.1360969	0.0002761
VENUS	2010-04-28 15:24	276.9	0.0350449	0.0188196	0.0054293
EARTH	2010-10-31 19:54	1314.2	0.1256183	0.1218766	0.0012479
EARTH	2015-11-15 14:42	495.7	0.0851116	0.0807566	0.0014518
MERCURY	2018-04-12 00:18	300.9	0.0317149	0.0312777	0.0001599
EARTH	2020-11-22 18:48	< 1 s	0.0272539	0.0272198	0.0000114
VENUS	2023-11-10 15:09	103.0	0.0187220	0.0140648	0.0015608
EARTH	2025-11-24 22:42	2.1	0.0444997	0.0430043	0.0004988
EARTH	2030-11-23 06:04	47.8	0.1650545	0.1610093	0.0013485
EARTH	2032-09-13 09:52	10.4	0.1207695	0.1168322	0.0013187
MERCURY	2034-08-24 00:42	449.7	0.0454916	0.0382696	0.0024438
EARTH	2037-09-14 07:21	194.9	0.0594019	0.0593525	0.0001065
EARTH	2042-09-27 08:26	1331.6	0.1085803	0.1025934	0.0020317
VENUS	2043-04-13 08:20	343.4	0.0139515	0.0028545	0.0060728
EARTH	2047-10-09 09:25	> 1 d	0.1313959	0.1236311	0.0026534
MERCURY	2051-01-09 22:07	> 1 d	0.0395605	0.0207037	0.0229375
EARTH	2052-10-18 12:01	> 1 w	0.1367178	0.1358707	0.0004356
EARTH	2057-10-28 16:46	> 1 w	0.1306041	0.0992570	0.0106270
EARTH	2062-11-06 08:02	> 1 w	0.1155284	0.0502788	0.0218475
EARTH	2067-11-15 22:37	> 1 d	0.0852906	0.0137933	0.0239794
MERCURY	2068-11-07 13:01	> 1 w	0.0331324	0.0288538	0.0108336
EARTH	2072-11-21 12:59	> 1 d	0.0462842	0.0175884	0.0098923
VENUS	2074-08-27 00:16	435.5	0.0085895	0.0030327	0.0036886
EARTH	2077-11-24 20:18	255.6	0.0333591	0.0090919	0.0341339
VENUS	2077-12-30 07:23	> 1 d	0.0124235	0.0043507	0.0443223
MERCURY	2083-10-18 13:44	> 1 mo	0.0348363	0.0113360	0.0937459
VENUS	2083-11-19 12:30	> 1 w	0.0091631	0.0031787	0.1931641
EARTH	2084-09-13 20:07	114.3	0.0611936	0.0578927	0.0057965
VENUS	2087-03-24 16:23	> 1 mo	0.0052586	0.0046000	0.4767585
EARTH	2089-09-18 19:27	> 1 mo	0.0791471	0.0603724	4.5629778
EARTH	2094-09-27 10:25	> 1 mo	0.1082359	0.0649773	11.4069573
VENUS	2097-06-02 16:49	> 1 mo	0.0361272	0.0030340	43.1850135
EARTH	2099-10-06 15:26	> 1 mo	0.1268723	0.0802164	7.8683451
MERCURY	2101-08-10 02:09	> 1 mo	0.0369071	0.0223005	14.7444694
EARTH	2104-10-13 09:47	> 1 mo	0.1340283	0.1061322	1.7696815
EARTH	2109-10-21 20:51	> 1 mo	0.1356655	0.0692180	0.8091095
EARTH	2114-10-29 21:36	> 1 mo	0.1300929	0.0356051	6.4024664
VENUS	2115-04-04 11:51	> 1 mo	0.0279382	0.0031777	37.3737775
VENUS	2118-08-09 13:47	> 1 mo	0.0123549	0.0050048	20.6114116
MERCURY	2119-06-13 23:15	> 1 mo	0.0451290	0.0166209	2.0757477
EARTH	2119-11-07 07:31	> 1 mo	0.1160256	0.0132009	4.9775858
MERCURY	2120-02-24 05:28	> 1 mo	0.0466978	0.0171520	9.3758104
EARTH	2124-11-08 04:46	> 1 mo	0.1119451	0.0078551	46.6416819

Download as:

Stationary Points

Ecc. an. ast.	Ecc. an. Earth	Distance in au	Classification
234.75400583	320.19655509	0.01002728	MINIMUM
129.65471994	249.58492675	0.05928655	MINIMUM
180.00756722	283.38948919	0.13573454	SADDLE
3.84409832	106.60076670	0.53410688	SADDLE
4.06052407	286.95648790	1.46602859	SADDLE
181.90964234	104.62277261	2.12707498	MAXIMUM

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MOID Plots

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