Asteroids

2025WO9 help

Last update: 2025-12-01 13:01 UTC

Orbital Properties

Epoch

61000.0

MJD

Orbit type

Apollo

Perihelion (q)

0.998

Aphelion (Q)

1.894

Eccentricity (e)

0.310

Inclination (i)

7.7

deg

Orbit period (P)

635.0

Earth MOID

0.02125

U parameter

7.9

Next Earth close approach

Date

2051-12-06

Nominal distance (from Earth center)

0.02174

3251684

Maximum Brightness

19.8

mag

Risk

Object is not in risk list

Physical Properties

Absolute Magnitude (H)

27.2

mag

Diameter

10 - 21*

Taxonomic type

Rotation period (T)

Discovery Information

Discovery Date

2025-11-28

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

1.445878

1-sigma variation

0.001159

Unit

Eccentricity (e)

Value

0.309955

1-sigma variation

0.000537

Unit

Inclination (i)

Value

7.7386

1-sigma variation

0.0110

Unit

Long. of Ascending Node (Ω)

Value

249.4726

1-sigma variation

0.0006

Unit

Arg. of Perihelion (ω)

Value

197.9039

1-sigma variation

0.0023

Unit

Mean Anomaly (M)

Value

345.06043

1-sigma variation

0.02044

Unit

Perihelion distance

Value

0.997720

1-sigma variation

Unit

Aphelion distance

Value

1.894036

1-sigma variation

Unit

Asc. Node-Earth Sep.

Value

0.838337

1-sigma variation

Unit

Desc. Node-Earth Sep.

Value

0.023193

1-sigma variation

Unit

MOID

Value

0.021251

1-sigma variation

Unit

Orbit Period

Value

635.0325

1-sigma variation

Unit

U parameter

Value

7.9

1-sigma variation

Unit

Covariance Matrix

	a	e	i	Ω	ω	M
a	1.34220E-6	6.21736E-7	1.26976E-5	6.71292E-7	-2.33671E-6	2.36662E-5
e	6.21736E-7	2.88003E-7	5.88190E-6	3.10948E-7	-1.08111E-6	1.09621E-5
i	1.26976E-5	5.88190E-6	1.20131E-4	6.34967E-6	-2.20292E-5	2.23852E-4
Ω	6.71292E-7	3.10948E-7	6.34967E-6	3.36022E-7	-1.17822E-6	1.18410E-5
ω	-2.33671E-6	-1.08111E-6	-2.20292E-5	-1.17822E-6	5.41252E-6	-4.18567E-5
M	2.36662E-5	1.09621E-5	2.23852E-4	1.18410E-5	-4.18567E-5	4.17611E-4

Date of computation: 2025-12-01 13:01 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

27.215

Unit

mag

Source

[1]

Slope Parameter (G)

Value

0.15**

Unit

Source

[1]

Albedo
Diameter

Size and albedo

Value

Unit

Source

Albedo

Value

0.05 - 0.25

Unit

Source

[2]

Diameter

Value

10 - 21*

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

Unit

Source

[1]

Normalized RMS of residuals

Value

0.577302

Unit

Source

[1]

Astrometry Summary

First Observation
Last Observation
Total Optical Observations (Discarded)

Optical

Value

Unit

Source

First Observation

Value

2025-11-27.273548

Unit

Source

[2]

Last Observation

Value

2025-12-01.235123

Unit

Source

[2]

Total Optical Observations (Discarded)

Value

30 (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

Note: Ephemerides requests are limited to a maximum of 100 points and a final date not exceeding 2080/07/22 14:12.

Close Approaches for 2025WO9 from 1950 to 2126

Body	Date in UTC	Time uncert. in min	Nominal distance in au	Min. possible distance in au	Distance uncert. in au
EARTH	1952-12-05 22:30	> 1 mo	0.0216251	0.0205467	0.1019961
EARTH	1986-01-07 14:09	> 1 w	0.1368048	0.0492008	0.1158068
EARTH	1992-11-19 06:37	> 1 w	0.1013415	0.0033955	0.2060234
EARTH	2025-12-03 01:03	< 1 min	0.0233746	0.0232634	0.0000370
EARTH	2051-12-06 01:12	> 1 mo	0.0217362	0.0216347	0.0147425
EARTH	2077-12-07 06:34	> 1 mo	0.0235597	0.0211756	2.4930350
EARTH	2110-11-24 14:03	> 1 mo	0.0769633	0.0107151	171.1016856

Download as:

Stationary Points

Ecc. an. ast.	Ecc. an. Earth	Distance in au	Classification
349.40219326	331.93682353	0.02125062	MINIMUM
180.72600431	166.31722750	0.87831403	SADDLE
359.70449578	165.76502329	2.01493211	SADDLE
179.29097912	345.27866138	2.87757665	MAXIMUM

Download:

MOID Plots

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