Asteroids

2020CW help

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

Orbital Properties

Epoch

61000.0

MJD

Orbit type

Apollo

Perihelion (q)

0.424

Aphelion (Q)

1.739

Eccentricity (e)

0.608

Inclination (i)

5.9

deg

Orbit period (P)

410.8

Earth MOID

0.00004

U parameter

8.3

Next Earth close approach

Date

2029-01-31

Nominal distance (from Earth center)

0.00144

215425

Maximum Brightness

mag

Risk

Object is in risk list

Physical Properties

Absolute Magnitude (H)

32.4

mag

Diameter

0.9 - 2.0*

Taxonomic type

Rotation period (T)

Discovery Information

Discovery Date

2020-02-01

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

1.081572

1-sigma variation

0.000745

Unit

Eccentricity (e)

Value

0.607665

1-sigma variation

0.000366

Unit

Inclination (i)

Value

5.9368

1-sigma variation

0.0028

Unit

Long. of Ascending Node (Ω)

Value

131.7912

1-sigma variation

0.0064

Unit

Arg. of Perihelion (ω)

Value

120.4628

1-sigma variation

0.0091

Unit

Mean Anomaly (M)

Value

9.66925

1-sigma variation

1.89125

Unit

Perihelion distance

Value

0.424338

1-sigma variation

Unit

Aphelion distance

Value

1.738806

1-sigma variation

Unit

Asc. Node-Earth Sep.

Value

0.000333

1-sigma variation

Unit

Desc. Node-Earth Sep.

Value

-0.494241

1-sigma variation

Unit

MOID

Value

0.000044

1-sigma variation

Unit

Orbit Period

Value

410.8484

1-sigma variation

Unit

U parameter

Value

8.3

1-sigma variation

Unit

Covariance Matrix

	a	e	i	Ω	ω	M
a	5.54536E-7	2.72464E-7	-2.05315E-6	-4.73026E-6	-6.72365E-6	-1.40836E-3
e	2.72464E-7	1.34063E-7	-1.00085E-6	-2.32404E-6	-3.28663E-6	-6.91975E-4
i	-2.05315E-6	-1.00085E-6	7.93602E-6	1.75186E-5	2.55979E-5	5.21470E-3
Ω	-4.73026E-6	-2.32404E-6	1.75186E-5	4.03498E-5	5.73640E-5	1.20135E-2
ω	-6.72365E-6	-3.28663E-6	2.55979E-5	5.73640E-5	8.30266E-5	1.70768E-2
M	-1.40836E-3	-6.91975E-4	5.21470E-3	1.20135E-2	1.70768E-2	3.57685E0

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

32.397

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

0.9 - 2.0*

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

[-]

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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

0.1

Unit

Source

[1]

Unobserved

Value

2065

Unit

Source

[1]

Normalized RMS of residuals

Value

0.638537

Unit

Source

[1]

Astrometry Summary

First Observation
Last Observation
Total Optical Observations (Discarded)

Optical

Value

Unit

Source

First Observation

Value

2020-02-01.328881

Unit

Source

[2]

Last Observation

Value

2020-02-01.463919

Unit

Source

[2]

Total Optical Observations (Discarded)

Value

13 (1)

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 2020CW 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	1951-09-09 18:09	> 1 mo	0.1732874	0.0249452	19.0613997
EARTH	1961-01-31 04:24	> 1 d	0.0038439	0.0006641	0.1548647
EARTH	1972-01-27 10:25	> 1 w	0.1119306	0.0009656	0.4237016
EARTH	1973-09-22 08:27	> 1 w	0.1151752	0.0250753	0.4225932
EARTH	1984-09-16 20:55	> 1 w	0.0274867	0.0249810	0.0813625
EARTH	1995-09-11 05:10	> 1 w	0.1712748	0.0255592	0.2259159
MERCURY	2002-05-22 16:18	> 1 w	0.0328467	0.0313618	0.0381631
EARTH	2009-02-06 19:14	> 1 d	0.1532702	0.0001777	0.0698984
VENUS	2010-09-16 09:46	> 1 d	0.0340775	0.0336626	0.0091650
EARTH	2020-02-01 12:49	< 1 s	0.0001049	0.0001046	0.0000001
EARTH	2023-10-05 05:41	1018.9	0.0991595	0.0905714	0.0086186
EARTH	2029-01-31 18:45	> 1 d	0.0014400	0.0001511	0.0575978
MERCURY	2030-04-25 17:47	> 1 mo	0.0390498	0.0365655	2.2216694
EARTH	2033-10-14 03:52	> 1 mo	0.1714139	0.0928066	17.3426138
VENUS	2036-11-13 02:52	> 1 mo	0.0198389	0.0100072	35.5459651
EARTH	2040-02-05 13:35	> 1 mo	0.1488152	0.0027973	18.8339826
EARTH	2065-10-04 13:32	> 1 mo	0.1572166	0.0922725	52.6174461
MERCURY	2066-09-05 19:01	> 1 mo	0.0373927	0.0370565	11.8872723
EARTH	2072-01-27 04:05	> 1 mo	0.1503063	0.0008616	65.4593143
MERCURY	2074-05-23 23:24	> 1 mo	0.0432709	0.0366610	40.3461655
EARTH	2076-10-07 03:55	> 1 mo	0.1002630	0.0926948	22.9673479
VENUS	2077-10-21 07:37	> 1 mo	0.0059641	0.0045406	46.9440628
EARTH	2083-02-02 18:40	> 1 mo	0.0285014	0.0023092	300.4376722
VENUS	2095-04-26 00:21	> 1 mo	0.0137120	0.0095263	10.3980720
EARTH	2097-10-07 08:07	> 1 mo	0.0999647	0.0898874	39.2140620
VENUS	2100-11-07 16:23	> 1 mo	0.0096975	0.0088771	87.1203913
EARTH	2104-02-06 08:35	> 1 mo	0.1076625	0.0017293	1044.2128853
EARTH	2118-10-10 02:35	> 1 mo	0.0934447	0.0933935	55.8186764
EARTH	2125-02-05 13:10	> 1 mo	0.1011437	0.0022064	4166.4308076

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Stationary Points

Ecc. an. ast.	Ecc. an. Earth	Distance in au	Classification
278.39585738	29.10874307	0.00007836	MINIMUM
81.95891742	271.57759838	0.09075367	MINIMUM
0.82049488	150.71349600	0.59265409	SADDLE
179.88221683	330.35203613	0.76229404	SADDLE
1.11085331	331.35498341	1.40887896	SADDLE
180.48026813	150.65328717	2.75065911	MAXIMUM

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MOID Plots

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

Level lines of the squared distance function

2020CW

Date in UTC	MJD	σ	Distance ± Width in RE	Stretching in RE	IP	Impact energy	PS
2046-02-01.124	68377.124	4.046	0.44 ± 0.016	1.73E4	1.37E-8	9.78E-5	-10.88
2048-02-01.473	69107.473	-3.747	1.14 ± 0.004	2.72E4	8.84E-9	9.52E-5	-11.11
2057-01-31.567	72394.567	-1.852	0.89 ± 0.051	8.67E4	1.33E-6	9.55E-5	-9.07


Based on 13 optical observations (of which 1 are rejected as outliers) from 2020/02/01.329 to 2020/02/01.464.
Coordinates are given on the Target Plane.
Unit is one Earth radius, but impact cross section has radius between 1.14 and 1.14 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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Download Impactor Table as: