Asteroids

2025KJ1 help

Last update: 2026-03-17 23:26 UTC

Orbital Properties

Epoch

61200.0

MJD

Orbit type

Apollo

Perihelion (q)

0.781

Aphelion (Q)

1.414

Eccentricity (e)

0.289

Inclination (i)

2.4

deg

Orbit period (P)

419.9

Earth MOID

0.00192

U parameter

6.6

Next Earth close approach

Date

2031-12-19

Nominal distance (from Earth center)

0.13735

20546727

Maximum Brightness

28.6

mag

Risk

Object is in risk list

Physical Properties

Absolute Magnitude (H)

27.9

mag

Diameter

7 - 16*

Taxonomic type

Rotation period (T)

Discovery Information

Discovery Date

2025-05-22

Observatory

MAPS, San Pedro de Atacama

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

61200.0000

1-sigma variation

Unit

MJD

Semimajor Axis

Value

1.097412

1-sigma variation

0.000088

Unit

Eccentricity (e)

Value

0.288536

1-sigma variation

0.000124

Unit

Inclination (i)

Value

2.4428

1-sigma variation

0.0011

Unit

Long. of Ascending Node (Ω)

Value

242.0486

1-sigma variation

0.0001

Unit

Arg. of Perihelion (ω)

Value

263.8584

1-sigma variation

0.0010

Unit

Mean Anomaly (M)

Value

30.32936

1-sigma variation

0.05438

Unit

Perihelion distance

Value

0.780769

1-sigma variation

Unit

Aphelion distance

Value

1.414055

1-sigma variation

Unit

Asc. Node-Earth Sep.

Value

0.026170

1-sigma variation

Unit

Desc. Node-Earth Sep.

Value

-0.012195

1-sigma variation

Unit

MOID

Value

0.001921

1-sigma variation

Unit

Orbit Period

Value

419.9070

1-sigma variation

Unit

U parameter

Value

6.6

1-sigma variation

Unit

Covariance Matrix

	a	e	i	Ω	ω	M
a	7.67594E-9	1.08478E-8	9.76793E-8	8.96698E-9	7.92737E-8	-4.76418E-6
e	1.08478E-8	1.53345E-8	1.38155E-7	1.26969E-8	1.11334E-7	-6.73269E-6
i	9.76793E-8	1.38155E-7	1.24973E-6	1.15418E-7	9.82581E-7	-6.06153E-5
Ω	8.96698E-9	1.26969E-8	1.15418E-7	1.10160E-8	8.62415E-8	-5.56276E-6
ω	7.92737E-8	1.11334E-7	9.82581E-7	8.62415E-8	9.56077E-7	-4.92466E-5
M	-4.76418E-6	-6.73269E-6	-6.06153E-5	-5.56276E-6	-4.92466E-5	2.95698E-3

Date of computation: 2026-03-17 23:26 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

27.866

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

7 - 16*

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

324

Unit

Source

[1]

Normalized RMS of residuals

Value

0.766163

Unit

Source

[1]

Astrometry Summary

First Observation
Last Observation
Total Optical Observations (Discarded)

Optical

Value

Unit

Source

First Observation

Value

2025-05-22.24889

Unit

Source

[2]

Last Observation

Value

2025-05-30.35369

Unit

Source

[2]

Total Optical Observations (Discarded)

Value

29 (1)

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 1000 points and a final date not exceeding 2040/12/31 00:00.

Close Approaches for 2025KJ1 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	1952-03-25 12:29	> 1 mo	0.1497286	0.0019006	31.7698752
EARTH	1956-11-21 16:11	> 1 mo	0.0401982	0.0013892	43.6121516
EARTH	1963-05-10 22:54	> 1 mo	0.0700628	0.0066972	100.4153386
EARTH	1968-01-05 04:45	> 1 mo	0.1497683	0.0123339	44.8258591
EARTH	1979-03-08 12:00	> 1 mo	0.1739662	0.0023637	13.2692876
EARTH	1983-11-16 23:56	> 1 mo	0.1405282	0.0021697	36.3684683
EARTH	1990-05-05 20:42	> 1 mo	0.0075991	0.0067030	0.4650382
EARTH	1994-11-24 09:26	211.4	0.0008528	0.0006411	0.0014436
EARTH	2003-05-11 22:58	305.1	0.0788767	0.0725942	0.0020944
EARTH	2016-11-27 15:39	694.6	0.0514710	0.0350795	0.0054643
EARTH	2025-05-17 20:06	< 1 min	0.0059068	0.0058986	0.0000027
EARTH	2031-12-19 15:57	> 1 d	0.1373464	0.1251080	0.0040825
EARTH	2046-11-12 20:14	1083.3	0.1844368	0.1284754	0.0186548
EARTH	2048-05-15 17:31	> 1 d	0.0337872	0.0034393	0.0184096
EARTH	2054-11-24 19:35	> 1 d	0.0404541	0.0024344	0.0205887
EARTH	2056-05-27 10:30	> 1 d	0.1865536	0.1219615	0.0215324
EARTH	2071-04-20 22:49	> 1 w	0.1398655	0.0896459	0.0167755
EARTH	2077-11-21 05:51	> 1 d	0.0098298	0.0016073	0.0156412
EARTH	2079-05-23 23:56	> 1 d	0.0658770	0.0005136	0.0872223
EARTH	2085-11-17 13:47	> 1 w	0.0831960	0.0018527	0.5066251
EARTH	2087-05-20 04:17	> 1 mo	0.0068518	0.0018780	0.5013184
EARTH	2095-01-13 18:03	> 1 mo	0.1890748	0.0415694	10.9414795
EARTH	2111-11-20 00:19	> 1 mo	0.0256170	0.0029223	80.7088269
EARTH	2113-05-18 11:23	> 1 mo	0.0513674	0.0423750	1.5070104
EARTH	2120-11-22 21:00	> 1 mo	0.0400057	0.0032760	435.4023752
EARTH	2122-05-22 14:04	> 1 mo	0.0161589	0.0015125	343.4446537

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Stationary Points

Ecc. an. ast.	Ecc. an. Earth	Distance in au	Classification
290.31619347	318.99732069	0.00184002	MINIMUM
74.66775803	135.41305415	0.00358989	MINIMUM
3.17624240	47.93798145	0.21135178	SADDLE
181.77319483	226.42664799	0.40440366	SADDLE
3.17484416	227.91457664	1.79313845	SADDLE
181.65272850	46.32403805	2.40223056	MAXIMUM

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MOID Plots

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

Level lines of the squared distance function

2025KJ1

Date in UTC	MJD	σ	σ_imp	Distance ± Width in RE	Stretching in RE	IP	Impact energy	PS
2078-11-23.193	80360.193	1.696	0.000	0.58 ± 0.000	1.34E9	2.24E-10	2.64E-2	-11.12
2080-05-22.452	80906.452	0.921	0.000	1.67 ± 0.005	1.65E6	2.05E-7	2.64E-2	-8.17
2085-11-23.830	82917.830	0.894	0.000	0.41 ± 0.012	3.73E6	2.33E-7	2.64E-2	-8.16
2086-05-22.917	83097.917	3.057	0.000	0.69 ± 0.005	6.73E5	1.75E-8	2.64E-2	-9.28
2088-05-22.338	83828.338	0.921	0.000	1.36 ± 0.006	4.63E7	1.21E-8	2.64E-2	-9.46
2089-11-23.433	84378.433	0.758	0.000	1.13 ± 0.017	3.88E7	1.91E-8	2.64E-2	-9.27
2094-11-23.997	86204.997	0.914	0.000	0.98 ± 0.009	6.17E5	1.17E-6	2.64E-2	-7.52
2095-11-23.645	86569.645	0.969	0.000	0.76 ± 0.716	1.25E8	5.96E-9	2.63E-2	-9.82
2098-11-23.856	87665.856	2.298	0.000	1.32 ± 0.002	5.71E4	1.55E-6	2.64E-2	-7.42
2101-11-24.532	88761.532	0.896	0.000	0.49 ± 0.110	4.23E7	2.11E-8	2.64E-2	-9.30
2101-11-24.586	88761.586	0.928	0.000	1.48 ± 0.010	5.82E6	6.99E-8	2.63E-2	-8.78
2103-11-25.053	89492.053	0.871	0.000	0.45 ± 0.009	2.71E6	3.29E-7	2.64E-2	-8.12
2103-11-25.150	89492.150	0.852	0.000	0.88 ± 0.006	1.32E6	6.70E-7	2.64E-2	-7.81
2106-05-23.379	90402.379	0.006	0.000	1.53 ± 0.000	3.52E7	3.24E-8	2.64E-2	-9.14
2106-11-24.887	90587.887	2.322	0.000	1.53 ± 0.010	1.03E6	3.57E-8	2.64E-2	-9.10
2109-11-24.519	91683.519	2.747	0.000	0.40 ± 0.089	1.51E8	1.97E-10	2.64E-2	-11.37
2110-11-24.308	92048.308	1.542	0.000	1.40 ± 0.018	2.42E5	1.68E-6	2.64E-2	-7.45
2110-11-24.321	92048.321	1.541	0.000	0.94 ± 0.045	2.70E5	1.47E-6	2.64E-2	-7.51
2110-11-24.530	92048.530	0.293	0.000	1.19 ± 0.028	2.02E7	4.48E-8	2.63E-2	-9.02
2111-11-24.497	92413.497	-0.369	0.000	0.97 ± 0.006	1.09E7	9.86E-8	2.64E-2	-8.69
2112-11-24.273	92779.273	0.333	0.000	0.74 ± 0.014	4.40E6	2.58E-7	2.64E-2	-8.27
2112-11-24.334	92779.334	0.335	0.000	1.46 ± 0.014	1.04E7	5.98E-8	2.64E-2	-8.91
2114-11-25.038	93510.038	2.730	0.000	1.05 ± 0.010	4.03E6	6.37E-9	2.64E-2	-9.89
2116-05-22.821	94054.821	0.265	0.000	0.59 ± 0.007	3.59E6	3.36E-7	2.64E-2	-8.17
2116-05-22.934	94054.934	-0.214	0.000	0.97 ± 0.004	1.52E6	7.10E-7	2.63E-2	-7.85
2117-05-22.817	94419.817	-0.749	0.000	0.13 ± 0.219	1.04E8	9.58E-9	2.63E-2	-9.72
2117-11-24.269	94605.269	1.156	0.000	0.30 ± 0.144	1.19E6	5.71E-7	2.64E-2	-7.95
2118-11-24.248	94970.248	0.309	0.000	0.80 ± 0.039	5.15E6	2.45E-7	2.64E-2	-8.32
2118-11-24.763	94970.763	-0.192	0.000	0.08 ± 0.011	1.51E7	8.67E-8	2.64E-2	-8.78
2119-11-24.930	95335.930	0.332	0.000	1.11 ± 0.014	5.37E6	1.77E-7	2.64E-2	-8.47
2119-11-24.984	95335.984	0.330	0.000	0.51 ± 0.011	1.24E7	9.76E-8	2.64E-2	-8.73
2119-11-25.003	95336.003	-0.418	0.000	1.30 ± 0.010	5.10E5	1.51E-6	2.64E-2	-7.54
2119-11-25.039	95336.039	-0.413	0.000	0.74 ± 0.017	8.31E5	1.47E-6	2.65E-2	-7.55
2119-11-25.105	95336.105	-0.430	0.000	0.95 ± 0.010	8.00E5	1.25E-6	2.65E-2	-7.62
2119-11-25.115	95336.115	-0.419	1.330	1.69 ± 0.011	1.55E6	5.02E-9	2.65E-2	-10.02
2120-05-22.658	95515.658	-0.292	0.000	0.45 ± 0.011	8.91E7	1.39E-8	2.63E-2	-9.58
2120-11-23.699	95700.699	1.542	0.000	0.33 ± 1.012	2.19E8	1.41E-9	2.65E-2	-10.57
2124-11-24.174	97162.174	0.114	0.000	0.71 ± 0.026	9.14E6	1.32E-7	2.64E-2	-8.62
2124-11-24.467	97162.467	0.925	0.000	0.82 ± 0.012	3.29E7	2.31E-8	2.64E-2	-9.38


Based on 29 optical observations (of which 1 are rejected as outliers) from 2025/05/22.249 to 2025/05/30.354.
Coordinates are given on the Target Plane.
Unit is one Earth radius, but impact cross section has radius between 1.68 and 1.68 Earth radii.
Coordinates for LOV = EQU scaled= 1 second= F.
Aegis software version= 5.0, Date of computation=20250805 130500.123 UTC.

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