Asteroids

2025LK help

Last update: 2025-09-10 00:30 UTC

Orbital Properties

Epoch

61000.0

MJD

Orbit type

Apollo

Perihelion (q)

0.918

Aphelion (Q)

1.609

Eccentricity (e)

0.273

Inclination (i)

13.3

deg

Orbit period (P)

519.0

Earth MOID

0.00198

U parameter

6.1

Next Earth close approach

Date

2052-06-08

Nominal distance (from Earth center)

0.00231

345887

Maximum Brightness

16.8

mag

Risk

Object is in risk list

Physical Properties

Absolute Magnitude (H)

26.9

mag

Diameter

11 - 25*

Taxonomic type

Rotation period (T)

Discovery Information

Discovery Date

2025-06-05

Observatory

Pan-STARRS 1, Haleakala

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

1.263917

1-sigma variation

0.000064

Unit

Eccentricity (e)

Value

0.273409

1-sigma variation

0.000048

Unit

Inclination (i)

Value

13.2757

1-sigma variation

0.0012

Unit

Long. of Ascending Node (Ω)

Value

78.0109

1-sigma variation

1.575E-5

Unit

Arg. of Perihelion (ω)

Value

235.9013

1-sigma variation

0.0002

Unit

Mean Anomaly (M)

Value

81.64053

1-sigma variation

0.00534

Unit

Perihelion distance

Value

0.918351

1-sigma variation

Unit

Aphelion distance

Value

1.609484

1-sigma variation

Unit

Asc. Node-Earth Sep.

Value

0.396135

1-sigma variation

Unit

Desc. Node-Earth Sep.

Value

-0.002644

1-sigma variation

Unit

MOID

Value

0.001984

1-sigma variation

Unit

Orbit Period

Value

519.0107

1-sigma variation

Unit

U parameter

Value

6.1

1-sigma variation

Unit

Covariance Matrix

	a	e	i	Ω	ω	M
a	4.14156E-9	3.08964E-9	7.85086E-8	7.85030E-10	1.28747E-8	-3.43636E-7
e	3.08964E-9	2.30501E-9	5.85610E-8	5.88687E-10	9.63906E-9	-2.56372E-7
i	7.85086E-8	5.85610E-8	1.48885E-6	1.46542E-8	2.41952E-7	-6.51302E-6
Ω	7.85030E-10	5.88687E-10	1.46542E-8	2.48090E-10	3.35269E-9	-6.55927E-8
ω	1.28747E-8	9.63906E-9	2.41952E-7	3.35269E-9	5.03704E-8	-1.07329E-6
M	-3.43636E-7	-2.56372E-7	-6.51302E-6	-6.55927E-8	-1.07329E-6	2.85149E-5

Date of computation: 2025-09-10 00:30 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

26.909

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

11 - 25*

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

153

Unit

Source

[1]

Normalized RMS of residuals

Value

0.594339

Unit

Source

[1]

Astrometry Summary

First Observation
Last Observation
Total Optical Observations (Discarded)

Optical

Value

Unit

Source

First Observation

Value

2025-06-03.332708

Unit

Source

[2]

Last Observation

Value

2025-06-08.401631

Unit

Source

[2]

Total Optical Observations (Discarded)

Value

98 (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 2025LK 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	1961-10-23 16:24	1431.0	0.1823745	0.1815538	0.0122227
EARTH	1971-07-02 15:44	> 1 mo	0.1465363	0.0473806	0.1498152
EARTH	1981-06-01 00:20	> 1 w	0.1041931	0.0060677	0.2053566
EARTH	2008-06-06 20:25	914.9	0.0197388	0.0014060	0.0079065
EARTH	2015-10-26 08:49	132.1	0.1939705	0.1889387	0.0018356
EARTH	2025-06-08 19:48	< 1 s	0.0006634	0.0006631	0.0000001
EARTH	2052-06-08 20:10	> 1 d	0.0023121	0.0000593	0.0121433
EARTH	2071-06-14 05:21	> 1 mo	0.0468178	0.0019597	16.2623075
EARTH	2093-05-26 05:39	> 1 mo	0.1987966	0.0126264	30.3417462
EARTH	2112-06-08 20:58	> 1 mo	0.0102386	0.0009813	58.5438750

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Stationary Points

Ecc. an. ast.	Ecc. an. Earth	Distance in au	Classification
313.47926388	155.33123812	0.00054655	MINIMUM
57.70522911	289.99044411	0.17908209	MINIMUM
15.76380341	237.30162059	0.22400865	SADDLE
184.38594964	37.97669442	0.67740023	SADDLE
0.01840541	35.65183403	1.88087734	SADDLE
177.36551173	212.71159486	2.62385174	MAXIMUM

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MOID Plots

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

Level lines of the squared distance function

2025LK

Date in UTC	MJD	σ	Distance ± Width in RE	Stretching in RE	IP	Impact energy	PS
2052-06-08.619	70696.619	-0.193	1.35 ± 0.000	2.65E2	2.00E-3	1.16E-1	-3.36
2059-06-09.324	73253.324	-0.166	1.32 ± 0.063	9.39E6	1.06E-7	1.16E-1	-7.73
2059-06-09.343	73253.343	-0.577	1.13 ± 0.000	3.37E4	2.02E-5	1.16E-1	-5.45
2060-06-08.585	73618.585	-0.216	1.05 ± 0.000	1.04E7	8.28E-8	1.16E-1	-7.85
2063-06-09.360	74714.360	-0.362	1.47 ± 0.000	3.03E5	1.02E-6	1.15E-1	-6.80
2067-06-09.311	76175.311	-0.217	1.48 ± 0.000	1.74E7	6.78E-8	1.16E-1	-8.02
2073-06-08.826	78366.826	-0.149	1.46 ± 0.000	8.52E6	5.46E-8	1.16E-1	-8.17
2073-06-08.844	78366.844	-0.230	0.60 ± 0.000	7.82E6	1.42E-7	1.15E-1	-7.76
2113-06-09.838	92976.838	-0.195	1.10 ± 0.000	5.15E7	2.30E-8	1.16E-1	-8.81


Based on 98 optical observations (of which 3 are rejected as outliers) from 2025/06/03.333 to 2025/06/08.402.
Coordinates are given on the Target Plane.
Unit is one Earth radius, but impact cross section has radius between 1.51 and 1.51 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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Download Impactor Table as: