Asteroids

2025UE9 help

Last update: 2025-10-30 13:00 UTC

Orbital Properties

Epoch

61000.0

MJD

Orbit type

Apollo

Perihelion (q)

0.456

Aphelion (Q)

3.605

Eccentricity (e)

0.775

Inclination (i)

3.7

deg

Orbit period (P)

1056.9

Earth MOID

0.00026

U parameter

7.9

Next Earth close approach

Date

2051-11-08

Nominal distance (from Earth center)

0.17587

26310316

Maximum Brightness

25.6

mag

Risk

Object is not in risk list

Physical Properties

Absolute Magnitude (H)

26.5

mag

Diameter

13 - 29*

Taxonomic type

Rotation period (T)

Discovery Information

Discovery Date

2025-10-29

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

2.030657

1-sigma variation

0.002399

Unit

Eccentricity (e)

Value

0.775488

1-sigma variation

0.000334

Unit

Inclination (i)

Value

3.7345

1-sigma variation

0.0020

Unit

Long. of Ascending Node (Ω)

Value

36.9504

1-sigma variation

0.0003

Unit

Arg. of Perihelion (ω)

Value

103.5390

1-sigma variation

0.0015

Unit

Mean Anomaly (M)

Value

351.88129

1-sigma variation

0.01873

Unit

Perihelion distance

Value

0.455908

1-sigma variation

Unit

Aphelion distance

Value

3.605407

1-sigma variation

Unit

Asc. Node-Earth Sep.

Value

-0.003573

1-sigma variation

Unit

Desc. Node-Earth Sep.

Value

-0.323267

1-sigma variation

Unit

MOID

Value

0.000256

1-sigma variation

Unit

Orbit Period

Value

1056.9474

1-sigma variation

Unit

U parameter

Value

7.9

1-sigma variation

Unit

Covariance Matrix

	a	e	i	Ω	ω	M
a	5.75363E-6	8.00342E-7	4.85142E-6	-6.15605E-7	2.91952E-6	4.49343E-5
e	8.00342E-7	1.11345E-7	6.75042E-7	-8.56339E-8	4.09718E-7	6.25062E-6
i	4.85142E-6	6.75042E-7	4.09875E-6	-5.20884E-7	2.50781E-6	3.78903E-5
Ω	-6.15605E-7	-8.56339E-8	-5.20884E-7	6.64718E-8	-3.13423E-7	-4.80773E-6
ω	2.91952E-6	4.09718E-7	2.50781E-6	-3.13423E-7	2.28215E-6	2.28385E-5
M	4.49343E-5	6.25062E-6	3.78903E-5	-4.80773E-6	2.28385E-5	3.50926E-4

Date of computation: 2025-10-30 13:00 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

26.525

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

0.9

Unit

Source

[1]

Unobserved

Value

Unit

Source

[1]

Normalized RMS of residuals

Value

0.78508

Unit

Source

[1]

Astrometry Summary

First Observation
Last Observation
Total Optical Observations (Discarded)

Optical

Value

Unit

Source

First Observation

Value

2025-10-29.224079

Unit

Source

[2]

Last Observation

Value

2025-10-30.167795

Unit

Source

[2]

Total Optical Observations (Discarded)

Value

52 (3)

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 2025UE9 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
MARS	1951-03-05 00:35	> 1 w	0.0194736	0.0127782	0.2431673
EARTH	1954-05-20 19:32	> 1 w	0.1194338	0.0283564	0.2865960
VENUS	1960-01-30 09:50	> 1 d	0.0258653	0.0254548	0.0158136
VENUS	1968-09-10 07:58	> 1 d	0.0298239	0.0263292	0.0095285
EARTH	1982-10-27 09:46	> 1 d	0.0246155	0.0053541	0.0332017
EARTH	2002-11-01 07:22	> 1 w	0.0649763	0.0044224	0.1846268
MARS	2011-05-11 21:06	> 1 d	0.0378054	0.0091623	0.1212848
EARTH	2025-10-30 16:07	< 1 s	0.0087133	0.0087004	0.0000043
EARTH	2051-11-08 19:26	> 1 w	0.1758736	0.0011991	0.2222001
EARTH	2069-05-21 18:57	> 1 w	0.1399794	0.0390783	0.1858337
EARTH	2092-05-17 21:50	> 1 d	0.1989310	0.0719684	0.0443264
EARTH	2115-06-02 17:39	> 1 d	0.0856363	0.0387084	0.1030969
EARTH	2123-11-08 02:01	> 1 w	0.1207085	0.0069344	0.1311980

Download as:

Stationary Points

Ecc. an. ast.	Ecc. an. Earth	Distance in au	Classification
311.21028098	296.27679568	0.00025645	MINIMUM
49.70924686	143.52164275	0.03166748	MINIMUM
1.04825222	40.75644864	0.53329863	SADDLE
1.14147556	220.97546043	1.46932279	SADDLE
180.12616217	219.43009774	2.59405134	SADDLE
180.15026455	39.43402050	4.59125433	MAXIMUM

Download:

MOID Plots

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