Asteroids

2025KJ help

Last update: 2025-05-22 12:46 UTC

Orbital Properties

Epoch

60800.0

MJD

Orbit type

Apollo

Perihelion (q)

0.747

Aphelion (Q)

2.632

Eccentricity (e)

0.558

Inclination (i)

5.9

deg

Orbit period (P)

802.3

Earth MOID

0.00308

U parameter

8.5

Next Earth close approach

Date

2033-12-13

Nominal distance (from Earth center)

0.12329

18444389

Maximum Brightness

25.6

mag

Risk

Object is in risk list

Object is in priority list

Physical Properties

Absolute Magnitude (H)

27.3

mag

Diameter

9 - 20*

Taxonomic type

Rotation period (T)

Discovery Information

Discovery Date

2025-05-19

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

60800.0000

1-sigma variation

Unit

MJD

Semimajor Axis

Value

1.689702

1-sigma variation

0.004150

Unit

Eccentricity (e)

Value

0.557738

1-sigma variation

0.001283

Unit

Inclination (i)

Value

5.9460

1-sigma variation

0.0120

Unit

Long. of Ascending Node (Ω)

Value

236.1424

1-sigma variation

0.0009

Unit

Arg. of Perihelion (ω)

Value

284.0774

1-sigma variation

0.0090

Unit

Mean Anomaly (M)

Value

16.85467

1-sigma variation

0.08116

Unit

Perihelion distance

Value

0.747291

1-sigma variation

Unit

Aphelion distance

Value

2.632113

1-sigma variation

Unit

Asc. Node-Earth Sep.

Value

0.014125

1-sigma variation

Unit

Desc. Node-Earth Sep.

Value

0.357829

1-sigma variation

Unit

MOID

Value

0.003082

1-sigma variation

Unit

Orbit Period

Value

802.2569

1-sigma variation

Unit

U parameter

Value

8.5

1-sigma variation

Unit

Covariance Matrix

	a	e	i	Ω	ω	M
a	1.72217E-5	5.32371E-6	4.97236E-5	-3.68425E-6	3.69967E-5	-3.36799E-4
e	5.32371E-6	1.64577E-6	1.53715E-5	-1.13808E-6	1.14250E-5	-1.04114E-4
i	4.97236E-5	1.53715E-5	1.43574E-4	-1.06289E-5	1.06717E-4	-9.72426E-4
Ω	-3.68425E-6	-1.13808E-6	-1.06289E-5	8.01251E-7	-8.08588E-6	7.20599E-5
ω	3.69967E-5	1.14250E-5	1.06717E-4	-8.08588E-6	8.18976E-5	-7.23651E-4
M	-3.36799E-4	-1.04114E-4	-9.72426E-4	7.20599E-5	-7.23651E-4	6.58670E-3

Date of computation: 2025-05-22 12:46 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

27.339

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

9 - 20*

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

Unit

Source

[1]

Normalized RMS of residuals

Value

0.59292

Unit

Source

[1]

Astrometry Summary

First Observation
Last Observation
Total Optical Observations (Discarded)

Optical

Value

Unit

Source

First Observation

Value

2025-05-19.264061

Unit

Source

[2]

Last Observation

Value

2025-05-22.27152

Unit

Source

[2]

Total Optical Observations (Discarded)

Value

28 (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 2025KJ 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	1968-01-09 16:34	> 1 mo	0.1697964	0.0442310	0.6077390
EARTH	1978-12-25 14:16	> 1 mo	0.0878859	0.0519655	0.4949541
EARTH	1989-12-20 01:52	> 1 w	0.0537558	0.0535216	0.0281870
EARTH	2000-12-14 07:28	> 1 w	0.0974120	0.0534244	0.3212003
EARTH	2014-05-23 15:03	> 1 w	0.1207422	0.0021646	0.2439237
EARTH	2025-05-16 03:21	< 1 min	0.0091118	0.0090511	0.0000202
EARTH	2033-12-13 14:14	> 1 w	0.1232931	0.0552109	0.1860154
EARTH	2045-01-14 15:57	> 1 mo	0.1851627	0.0471966	0.2584554
EARTH	2067-05-13 13:50	> 1 mo	0.0334945	0.0009462	0.9332625
MARS	2073-07-30 05:48	> 1 mo	0.0420318	0.0159112	0.5764417
EARTH	2078-05-25 15:02	> 1 mo	0.1435358	0.0013658	1.9698939
EARTH	2086-12-17 15:36	> 1 mo	0.0810325	0.0583362	2.6498435
EARTH	2098-01-02 23:22	> 1 mo	0.1374647	0.0554524	4.1977741

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Stationary Points

Ecc. an. ast.	Ecc. an. Earth	Distance in au	Classification
43.97484783	131.60627713	0.00308248	MINIMUM
317.65184497	346.04010975	0.05503761	MINIMUM
0.66659576	58.25011374	0.25879082	SADDLE
180.31675906	238.53125708	1.63189022	SADDLE
1.48496772	239.75800436	1.75345806	SADDLE
180.50934907	58.62949665	3.61978093	MAXIMUM

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MOID Plots

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

Level lines of the squared distance function

2025KJ

Date in UTC	MJD	σ	Distance ± Width in RE	Stretching in RE/σ	IP	Exp. energy	PS
2081-05-16.185	81265.185	4.678	0.53 ± 0.008	1.23E6	1.30E-11	1.40E-12	-11.89
2081-05-16.187	81265.187	3.637	1.22 ± 0.011	2.42E4	1.72E-8	1.82E-9	-8.77
2082-05-16.367	81630.367	-1.330	0.92 ± 0.009	7.13E5	3.90E-7	3.84E-8	-7.45
2095-05-16.528	86378.528	-1.303	1.24 ± 0.009	1.72E6	1.48E-7	1.46E-8	-7.96


Based on 28 optical observations (of which 0 are rejected as outliers) from 2025/05/19.264 to 2025/05/22.272.
Coordinates are given on the Target Plane.
Unit is one Earth radius, but impact cross section has radius between 1.25 and 1.25 Earth radii.
Coordinates for LOV = EQU scaled= 1 second= F.
Aegis software version= 5.0, Date of computation=20250522 133220.223 UTC.

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