Asteroids

2025XK help

Last update: 2026-02-09 10:13 UTC

Orbital Properties

Epoch

61000.0

MJD

Orbit type

Apollo

Perihelion (q)

0.880

Aphelion (Q)

1.621

Eccentricity (e)

0.296

Inclination (i)

5.1

deg

Orbit period (P)

510.6

Earth MOID

0.00076

U parameter

5.3

Next Earth close approach

Date

2042-08-16

Nominal distance (from Earth center)

0.10341

15470327

Maximum Brightness

24.9

mag

Risk

Object is in risk list

Physical Properties

Absolute Magnitude (H)

26.2

mag

Diameter

15 - 30*

Taxonomic type

Rotation period (T)

Discovery Information

Discovery Date

2025-12-08

Observatory

Catalina Sky 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

1.250264

1-sigma variation

0.000019

Unit

Eccentricity (e)

Value

0.296229

1-sigma variation

0.000013

Unit

Inclination (i)

Value

5.0660

1-sigma variation

0.0002

Unit

Long. of Ascending Node (Ω)

Value

75.0634

1-sigma variation

2.449E-5

Unit

Arg. of Perihelion (ω)

Value

301.5463

1-sigma variation

4.803E-5

Unit

Mean Anomaly (M)

Value

21.01945

1-sigma variation

0.00076

Unit

Perihelion distance

Value

0.879900

1-sigma variation

Unit

Aphelion distance

Value

1.620628

1-sigma variation

Unit

Asc. Node-Earth Sep.

Value

0.002095

1-sigma variation

Unit

Desc. Node-Earth Sep.

Value

0.333676

1-sigma variation

Unit

MOID

Value

0.000764

1-sigma variation

Unit

Orbit Period

Value

510.6237

1-sigma variation

Unit

U parameter

Value

5.3

1-sigma variation

Unit

Covariance Matrix

	a	e	i	Ω	ω	M
a	3.52945E-10	2.52631E-10	3.61863E-9	-4.54918E-10	5.29332E-10	-1.43166E-8
e	2.52631E-10	1.80847E-10	2.59065E-9	-3.25374E-10	3.73573E-10	-1.02456E-8
i	3.61863E-9	2.59065E-9	3.71234E-8	-4.65207E-9	5.27830E-9	-1.46731E-7
Ω	-4.54918E-10	-3.25374E-10	-4.65207E-9	5.99849E-10	-7.60674E-10	1.84773E-8
ω	5.29332E-10	3.73573E-10	5.27830E-9	-7.60674E-10	2.30691E-9	-2.20170E-8
M	-1.43166E-8	-1.02456E-8	-1.46731E-7	1.84773E-8	-2.20170E-8	5.80928E-7

Date of computation: 2026-02-09 10:13 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

26.222

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

15 - 30*

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

0.576703

Unit

Source

[1]

Astrometry Summary

First Observation
Last Observation
Total Optical Observations (Discarded)

Optical

Value

Unit

Source

First Observation

Value

2025-12-08.207156

Unit

Source

[2]

Last Observation

Value

2026-01-18.410517

Unit

Source

[2]

Total Optical Observations (Discarded)

Value

126 (2)

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 2025XK 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	1951-11-14 09:28	> 1 d	0.0960057	0.0872305	0.0029305
EARTH	1958-10-17 05:43	> 1 d	0.1349861	0.1319370	0.0010245
EARTH	1965-09-16 17:34	> 1 d	0.1388644	0.1371063	0.0005940
EARTH	1972-08-12 08:59	929.4	0.1022720	0.0975369	0.0016162
EARTH	1979-07-30 17:30	246.9	0.0729837	0.0727434	0.0001530
EARTH	1986-07-23 08:43	170.5	0.1274659	0.1222615	0.0017524
EARTH	2018-12-14 17:40	88.4	0.0932596	0.0902652	0.0009982
EARTH	2025-12-07 16:54	< 1 s	0.0087253	0.0087242	0.0000004
EARTH	2042-08-16 15:02	816.6	0.1034127	0.0996553	0.0012785
EARTH	2049-12-08 07:20	446.7	0.0145482	0.0053184	0.0030789
EARTH	2059-09-04 02:46	> 1 mo	0.1234984	0.0844353	0.0289103
EARTH	2076-12-08 15:03	> 1 w	0.0184364	0.0000478	0.1784996
EARTH	2086-12-05 22:06	> 1 mo	0.0101103	0.0000170	2.6305408
EARTH	2096-07-27 18:52	> 1 mo	0.1122901	0.0757494	87.7942321
EARTH	2103-12-06 05:43	> 1 mo	0.0185612	0.0006236	186.5881379
EARTH	2120-07-29 06:02	> 1 mo	0.1011117	0.0759137	2719.6701112

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Stationary Points

Ecc. an. ast.	Ecc. an. Earth	Distance in au	Classification
44.39274268	333.69885198	0.00076380	MINIMUM
306.60321796	207.00976859	0.07332586	MINIMUM
351.98529490	265.64081892	0.14189823	SADDLE
177.04970231	92.61295593	0.62627510	SADDLE
356.05009844	91.16488223	1.88019389	SADDLE
178.26984663	273.51589709	2.61821268	MAXIMUM

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MOID Plots

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

Level lines of the squared distance function

2025XK

Date in UTC	MJD	σ	Distance ± Width in RE	Stretching in RE	IP	Impact energy	PS
2064-12-06.556	75260.556	-4.697	1.66 ± 0.000	1.27E6	1.59E-11	2.54E-1	-11.34
2066-12-06.997	75990.997	-4.845	1.56 ± 0.000	1.43E5	3.25E-11	2.54E-1	-11.05
2066-12-07.003	75991.003	-4.805	1.06 ± 0.000	1.88E5	5.65E-11	2.53E-1	-10.82
2072-12-06.543	78182.543	-3.095	1.44 ± 0.000	3.78E4	2.17E-7	2.54E-1	-7.29
2076-12-06.669	79643.669	-2.136	1.47 ± 0.001	4.71E5	1.60E-7	2.54E-1	-7.46
2077-12-06.821	80008.821	-4.048	0.70 ± 0.001	2.51E5	1.47E-9	2.53E-1	-9.50
2080-12-06.567	81104.567	-4.077	1.26 ± 0.000	2.18E5	1.06E-9	2.53E-1	-9.67
2082-12-07.134	81835.134	-2.895	0.95 ± 0.000	2.28E4	8.47E-7	2.54E-1	-6.78
2084-12-06.616	82565.616	-3.835	1.35 ± 0.000	1.36E5	5.60E-9	2.54E-1	-8.98
2085-12-06.885	82930.885	-3.259	1.44 ± 0.000	4.87E4	7.56E-8	2.54E-1	-7.85
2086-12-07.100	83296.100	-2.115	1.00 ± 0.001	2.32E5	6.30E-7	2.54E-1	-6.94
2087-12-07.330	83661.330	0.120	0.37 ± 0.000	7.66E6	1.74E-7	2.54E-1	-7.51
2092-12-06.658	85487.658	0.084	1.53 ± 0.006	2.23E6	2.78E-7	2.54E-1	-7.33


Based on 126 optical observations (of which 2 are rejected as outliers) from 2025/12/08.207 to 2026/01/18.411.
Coordinates are given on the Target Plane.
Unit is one Earth radius, but impact cross section has radius between 1.72 and 1.72 Earth radii.
Coordinates for LOV = EQU scaled= 1 second= F.
Aegis software version= 5.0, Date of computation=20260208 132550.087 UTC.

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