Asteroids

2022WR4 help

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

Orbital Properties

Epoch

61000.0

MJD

Orbit type

Apollo

Perihelion (q)

0.965

Aphelion (Q)

2.428

Eccentricity (e)

0.431

Inclination (i)

7.6

deg

Orbit period (P)

807.2

Earth MOID

0.00154

U parameter

7.1

Next Earth close approach

Date

2053-09-12

Nominal distance (from Earth center)

0.18956

28357591

Maximum Brightness

mag

Risk

Object is in risk list

Physical Properties

Absolute Magnitude (H)

29.9

mag

Diameter

2.8 - 6*

Taxonomic type

Rotation period (T)

Discovery Information

Discovery Date

2022-11-23

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

1.696594

1-sigma variation

0.000533

Unit

Eccentricity (e)

Value

0.431192

1-sigma variation

0.000185

Unit

Inclination (i)

Value

7.5961

1-sigma variation

0.0025

Unit

Long. of Ascending Node (Ω)

Value

59.6928

1-sigma variation

0.0001

Unit

Arg. of Perihelion (ω)

Value

336.3811

1-sigma variation

0.0014

Unit

Mean Anomaly (M)

Value

136.73318

1-sigma variation

0.23502

Unit

Perihelion distance

Value

0.965036

1-sigma variation

Unit

Aphelion distance

Value

2.428152

1-sigma variation

Unit

Asc. Node-Earth Sep.

Value

0.002188

1-sigma variation

Unit

Desc. Node-Earth Sep.

Value

1.269763

1-sigma variation

Unit

MOID

Value

0.001537

1-sigma variation

Unit

Orbit Period

Value

807.1706

1-sigma variation

Unit

U parameter

Value

7.1

1-sigma variation

Unit

Covariance Matrix

	a	e	i	Ω	ω	M
a	2.84124E-7	9.83563E-8	1.32184E-6	3.26736E-8	-7.22656E-7	-1.25273E-4
e	9.83563E-8	3.40485E-8	4.57587E-7	1.13275E-8	-2.50243E-7	-4.33663E-5
i	1.32184E-6	4.57587E-7	6.14975E-6	1.52239E-7	-3.36311E-6	-5.82812E-4
Ω	3.26736E-8	1.13275E-8	1.52239E-7	6.09031E-9	-9.37896E-8	-1.44036E-5
ω	-7.22656E-7	-2.50243E-7	-3.36311E-6	-9.37896E-8	1.88839E-6	3.18614E-4
M	-1.25273E-4	-4.33663E-5	-5.82812E-4	-1.44036E-5	3.18614E-4	5.52344E-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

29.866

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

2.8 - 6*

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

Unit

Source

[1]

Unobserved

Value

1023

Unit

Source

[1]

Normalized RMS of residuals

Value

0.861254

Unit

Source

[1]

Astrometry Summary

First Observation
Last Observation
Total Optical Observations (Discarded)

Optical

Value

Unit

Source

First Observation

Value

2022-11-23.452602

Unit

Source

[2]

Last Observation

Value

2022-11-26.560253

Unit

Source

[2]

Total Optical Observations (Discarded)

Value

21 (5)

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 2022WR4 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	1964-11-28 18:55	> 1 w	0.0451213	0.0003765	0.1108940
EARTH	2007-10-04 13:47	> 1 w	0.1032580	0.0872624	0.0173778
EARTH	2022-11-22 02:49	< 1 min	0.0017761	0.0017742	0.0000006
EARTH	2053-09-12 21:11	> 1 d	0.1895588	0.1133682	0.0638778
EARTH	2064-11-17 13:32	> 1 w	0.0162036	0.0003405	0.0737483
EARTH	2075-11-12 18:35	> 1 mo	0.0339261	0.0046453	1.0863788
EARTH	2086-09-30 04:05	> 1 mo	0.1176747	0.0926709	1.0892736

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Stationary Points

Ecc. an. ast.	Ecc. an. Earth	Distance in au	Classification
14.69577522	317.60780166	0.00149698	MINIMUM
178.70066959	112.86341369	1.42447126	SADDLE
357.67126009	111.27289326	1.97039756	SADDLE
179.49525068	293.36737121	3.42064810	MAXIMUM

Download:

MOID Plots

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

Level lines of the squared distance function

2022WR4

Date in UTC	MJD	σ	Distance ± Width in RE	Stretching in RE	IP	Impact energy	PS
2101-11-22.948	88759.948	0.147	1.64 ± 0.000	4.54E5	9.72E-7	1.20E-3	-8.70
2106-11-23.119	90586.119	-2.314	1.43 ± 0.006	6.26E5	1.06E-7	1.20E-3	-9.69
2106-11-23.129	90586.129	3.062	1.64 ± 0.002	3.10E4	9.69E-8	1.21E-3	-9.73
2106-11-23.150	90586.150	2.069	0.88 ± 0.005	5.50E4	2.52E-6	1.20E-3	-8.32
2106-11-23.157	90586.157	-3.365	0.61 ± 0.001	7.99E4	5.48E-8	1.19E-3	-9.98
2106-11-23.158	90586.158	1.230	0.56 ± 0.005	2.35E5	2.54E-6	1.20E-3	-8.31
2106-11-23.169	90586.169	3.469	0.77 ± 0.000	2.90E4	1.04E-7	1.21E-3	-9.70
2106-11-23.183	90586.183	-1.600	0.83 ± 0.003	2.11E4	1.61E-5	1.19E-3	-7.51
2111-11-23.412	92412.412	0.314	1.29 ± 0.005	3.78E5	2.33E-6	1.20E-3	-8.38
2113-11-22.945	93142.945	0.455	1.59 ± 0.000	4.13E5	1.48E-6	1.20E-3	-8.58
2119-11-23.429	95334.429	1.161	1.59 ± 0.002	5.16E5	6.05E-7	1.20E-3	-9.01


Based on 21 optical observations (of which 5 are rejected as outliers) from 2022/11/23.453 to 2022/11/26.560.
Coordinates are given on the Target Plane.
Unit is one Earth radius, but impact cross section has radius between 1.69 and 1.69 Earth radii.
Coordinates for LOV = EQU scaled= 1 second= F.
Aegis software version= 4.0, Date of computation=20250805 130500.123 UTC.

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