Asteroids

2025XK1 help

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

Orbital Properties

Epoch

61200.0

MJD

Orbit type

Apollo

Perihelion (q)

0.982

Aphelion (Q)

1.509

Eccentricity (e)

0.212

Inclination (i)

4.8

deg

Orbit period (P)

507.7

Earth MOID

0.00483

U parameter

5.4

Next Earth close approach

Date

2050-12-27

Nominal distance (from Earth center)

0.0842

12596703

Maximum Brightness

24.6

mag

Risk

Object is not in risk list

Physical Properties

Absolute Magnitude (H)

27.4

mag

Diameter

9 - 19*

Taxonomic type

Rotation period (T)

Discovery Information

Discovery Date

2025-12-10

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

61200.0000

1-sigma variation

Unit

MJD

Semimajor Axis

Value

1.245498

1-sigma variation

0.000020

Unit

Eccentricity (e)

Value

0.211796

1-sigma variation

0.000013

Unit

Inclination (i)

Value

4.7761

1-sigma variation

0.0003

Unit

Long. of Ascending Node (Ω)

Value

260.1884

1-sigma variation

1.679E-5

Unit

Arg. of Perihelion (ω)

Value

161.2803

1-sigma variation

0.0003

Unit

Mean Anomaly (M)

Value

138.53316

1-sigma variation

0.00319

Unit

Perihelion distance

Value

0.981706

1-sigma variation

Unit

Aphelion distance

Value

1.509290

1-sigma variation

Unit

Asc. Node-Earth Sep.

Value

0.472712

1-sigma variation

Unit

Desc. Node-Earth Sep.

Value

0.005989

1-sigma variation

Unit

MOID

Value

0.004829

1-sigma variation

Unit

Orbit Period

Value

507.7068

1-sigma variation

Unit

U parameter

Value

5.4

1-sigma variation

Unit

Covariance Matrix

	a	e	i	Ω	ω	M
a	3.95467E-10	2.57714E-10	5.36384E-9	3.31969E-10	-6.53285E-9	-6.34973E-8
e	2.57714E-10	1.67946E-10	3.49556E-9	2.16321E-10	-4.25892E-9	-4.13782E-8
i	5.36384E-9	3.49556E-9	7.27892E-8	4.49923E-9	-8.87493E-8	-8.61141E-7
Ω	3.31969E-10	2.16321E-10	4.49923E-9	2.81859E-10	-5.47123E-9	-5.33118E-8
ω	-6.53285E-9	-4.25892E-9	-8.87493E-8	-5.47123E-9	1.10138E-7	1.04753E-6
M	-6.34973E-8	-4.13782E-8	-8.61141E-7	-5.33118E-8	1.04753E-6	1.01962E-5

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

27.425

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

9 - 19*

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

Unit

Source

[1]

Unobserved

Value

119

Unit

Source

[1]

Normalized RMS of residuals

Value

0.620925

Unit

Source

[1]

Astrometry Summary

First Observation
Last Observation
Total Optical Observations (Discarded)

Optical

Value

Unit

Source

First Observation

Value

2025-12-10.158752

Unit

Source

[2]

Last Observation

Value

2025-12-21.425737

Unit

Source

[2]

Total Optical Observations (Discarded)

Value

130 (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 2025XK1 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	1968-10-25 04:44	> 1 mo	0.0704608	0.0516966	0.2497033
EARTH	1972-12-31 23:51	> 1 w	0.1640930	0.0105987	0.4690635
MARS	1984-06-30 19:30	> 1 mo	0.0486521	0.0389902	0.0869625
EARTH	1995-09-27 03:04	> 1 d	0.1987029	0.0798689	0.0684985
EARTH	1999-12-12 07:57	1312.8	0.0061507	0.0048941	0.0017527
EARTH	2025-12-12 02:17	< 1 s	0.0067125	0.0067114	0.0000004
EARTH	2050-12-27 14:22	478.7	0.0842038	0.0745490	0.0032194
EARTH	2057-10-15 18:41	67.2	0.1177168	0.1164871	0.0004108
MARS	2082-04-24 19:12	> 1 d	0.0354504	0.0234891	0.0042506
EARTH	2082-12-02 11:04	> 1 d	0.0193543	0.0005999	0.0066938
EARTH	2100-10-11 14:07	> 1 w	0.1482839	0.0654329	0.1760454
EARTH	2112-01-01 18:52	> 1 w	0.1205653	0.0121288	0.2159540

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Stationary Points

Ecc. an. ast.	Ecc. an. Earth	Distance in au	Classification
15.46477960	337.52263113	0.00485747	MINIMUM
176.23815595	134.68208444	0.47564352	SADDLE
356.14094504	134.19987227	1.99255369	SADDLE
178.10348680	316.21702510	2.47517868	MAXIMUM

Download:

MOID Plots

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