Asteroids

2025WM4 help

Last update: 2025-11-29 13:15 UTC

Orbital Properties

Epoch

61000.0

MJD

Orbit type

Apollo

Perihelion (q)

0.819

Aphelion (Q)

2.998

Eccentricity (e)

0.571

Inclination (i)

9.3

deg

Orbit period (P)

962.9

Earth MOID

0.00102

U parameter

7.7

Next Earth close approach

Date

2025-11-30

Nominal distance (from Earth center)

0.00181

271296

Maximum Brightness

15.4

mag

Risk

Object is not in risk list

Physical Properties

Absolute Magnitude (H)

26.6

mag

Diameter

13 - 29*

Taxonomic type

Rotation period (T)

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

1.908340

1-sigma variation

0.001477

Unit

Eccentricity (e)

Value

0.570869

1-sigma variation

0.000368

Unit

Inclination (i)

Value

9.3343

1-sigma variation

0.0048

Unit

Long. of Ascending Node (Ω)

Value

247.9263

1-sigma variation

0.0001

Unit

Arg. of Perihelion (ω)

Value

238.1987

1-sigma variation

0.0001

Unit

Mean Anomaly (M)

Value

341.59847

1-sigma variation

0.02408

Unit

Perihelion distance

Value

0.818928

1-sigma variation

Unit

Aphelion distance

Value

2.997753

1-sigma variation

Unit

Asc. Node-Earth Sep.

Value

0.825152

1-sigma variation

Unit

Desc. Node-Earth Sep.

Value

0.002496

1-sigma variation

Unit

MOID

Value

0.001018

1-sigma variation

Unit

Orbit Period

Value

962.9020

1-sigma variation

Unit

U parameter

Value

7.7

1-sigma variation

Unit

Covariance Matrix

	a	e	i	Ω	ω	M
a	2.18166E-6	5.43502E-7	7.07184E-6	-8.55438E-8	-4.55729E-8	3.55652E-5
e	5.43502E-7	1.35399E-7	1.76176E-6	-2.13087E-8	-1.13357E-8	8.86011E-6
i	7.07184E-6	1.76176E-6	2.29253E-5	-2.75518E-7	-1.45641E-7	1.15283E-4
Ω	-8.55438E-8	-2.13087E-8	-2.75518E-7	5.97174E-9	3.49240E-9	-1.39606E-6
ω	-4.55729E-8	-1.13357E-8	-1.45641E-7	3.49240E-9	7.26922E-9	-7.44796E-7
M	3.55652E-5	8.86011E-6	1.15283E-4	-1.39606E-6	-7.44796E-7	5.79781E-4

Date of computation: 2025-11-29 13:15 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

26.588

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

13 - 29*

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

0.8

Unit

Source

[1]

Normalized RMS of residuals

Value

0.449732

Unit

Source

[1]

Astrometry Summary

First Observation
Last Observation
Total Optical Observations (Discarded)

Optical

Value

Unit

Source

First Observation

Value

2025-11-25.316192

Unit

Source

[2]

Last Observation

Value

2025-11-29.401172

Unit

Source

[2]

Total Optical Observations (Discarded)

Value

46 (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 2025WM4 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	1989-04-05 09:44	> 1 d	0.1691999	0.1434531	0.0229507
EARTH	1996-12-05 23:09	> 1 w	0.0550017	0.0036878	0.2023995
EARTH	2018-03-26 11:48	> 1 d	0.1465896	0.1424743	0.0127724
EARTH	2025-11-30 17:44	< 1 min	0.0018135	0.0018102	0.0000011
EARTH	2045-01-10 23:52	> 1 mo	0.1878114	0.1002540	0.0524369
EARTH	2064-02-25 21:29	> 1 mo	0.1942241	0.1582848	0.0753134
EARTH	2083-03-30 21:18	> 1 w	0.1373392	0.1363314	0.0381861
EARTH	2093-11-21 11:05	> 1 w	0.1302203	0.0031600	0.4234565
EARTH	2112-12-06 23:14	> 1 mo	0.0496396	0.0054957	0.2629689

Download as:

Stationary Points

Ecc. an. ast.	Ecc. an. Earth	Distance in au	Classification
327.78179898	327.50412613	0.00101803	MINIMUM
35.34421937	86.90741070	0.14223416	MINIMUM
5.87214154	35.08179523	0.21241764	SADDLE
1.31451412	206.45032276	1.83093721	SADDLE
180.69886276	204.98375977	1.99587801	SADDLE
179.95192168	24.58454943	3.97575558	MAXIMUM

Download:

MOID Plots

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