Asteroids

2025XU1 help

Last update: 2026-03-31 13:01 UTC

Orbital Properties

Epoch

61200.0

MJD

Orbit type

Apollo

Perihelion (q)

0.731

Aphelion (Q)

2.040

Eccentricity (e)

0.472

Inclination (i)

16.9

deg

Orbit period (P)

595.8

Earth MOID

0.00126

U parameter

6.9

Next Earth close approach

Date

2048-06-20

Nominal distance (from Earth center)

0.08238

12324310

Maximum Brightness

22.5

mag

Risk

Object is in risk list

Physical Properties

Absolute Magnitude (H)

25.8

mag

Diameter

19 - 40*

Taxonomic type

Rotation period (T)

Discovery Information

Discovery Date

2025-12-10

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

1.385635

1-sigma variation

0.000234

Unit

Eccentricity (e)

Value

0.472375

1-sigma variation

0.000111

Unit

Inclination (i)

Value

16.8553

1-sigma variation

0.0033

Unit

Long. of Ascending Node (Ω)

Value

255.5626

1-sigma variation

0.0001

Unit

Arg. of Perihelion (ω)

Value

100.9667

1-sigma variation

0.0018

Unit

Mean Anomaly (M)

Value

141.56139

1-sigma variation

0.03880

Unit

Perihelion distance

Value

0.731095

1-sigma variation

Unit

Aphelion distance

Value

2.040174

1-sigma variation

Unit

Asc. Node-Earth Sep.

Value

0.167891

1-sigma variation

Unit

Desc. Node-Earth Sep.

Value

0.002272

1-sigma variation

Unit

MOID

Value

0.001261

1-sigma variation

Unit

Orbit Period

Value

595.7602

1-sigma variation

Unit

U parameter

Value

6.9

1-sigma variation

Unit

Covariance Matrix

	a	e	i	Ω	ω	M
a	5.48788E-8	2.61047E-8	7.83392E-7	-1.73990E-8	4.28130E-7	-9.08852E-6
e	2.61047E-8	1.24175E-8	3.72645E-7	-8.27591E-9	2.03644E-7	-4.32321E-6
i	7.83392E-7	3.72645E-7	1.11830E-5	-2.48336E-7	6.11113E-6	-1.29738E-4
Ω	-1.73990E-8	-8.27591E-9	-2.48336E-7	5.53309E-9	-1.35820E-7	2.88147E-6
ω	4.28130E-7	2.03644E-7	6.11113E-6	-1.35820E-7	3.34149E-6	-7.09029E-5
M	-9.08852E-6	-4.32321E-6	-1.29738E-4	2.88147E-6	-7.09029E-5	1.50516E-3

Date of computation: 2026-03-31 13:01 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

25.755

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

19 - 40*

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

117

Unit

Source

[1]

Normalized RMS of residuals

Value

0.606151

Unit

Source

[1]

Astrometry Summary

First Observation
Last Observation
Total Optical Observations (Discarded)

Optical

Value

Unit

Source

First Observation

Value

2025-12-08.204395

Unit

Source

[2]

Last Observation

Value

2025-12-23.460602

Unit

Source

[2]

Total Optical Observations (Discarded)

Value

65 (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 2025XU1 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	1962-06-14 05:11	> 1 w	0.1364167	0.0720567	0.1744832
EARTH	1978-12-15 18:11	> 1 d	0.1605894	0.0010745	0.0774278
EARTH	1991-12-05 22:59	> 1 d	0.0360023	0.0023152	0.0482670
EARTH	1996-06-23 02:08	> 1 d	0.1246579	0.0733322	0.0341648
EARTH	2009-06-11 15:05	> 1 d	0.1873260	0.1210006	0.0232971
EARTH	2025-12-07 21:32	< 1 s	0.0063731	0.0063691	0.0000013
EARTH	2048-06-20 08:15	> 1 d	0.0823829	0.0809230	0.0066479
EARTH	2056-12-05 11:09	> 1 d	0.0349464	0.0001012	0.0600846
EARTH	2069-12-16 20:40	> 1 d	0.1790368	0.0057068	0.0873923
EARTH	2092-06-20 07:45	> 1 w	0.0831616	0.0820859	0.0472672
EARTH	2100-12-03 03:23	> 1 w	0.0904722	0.0045161	0.4566103
EARTH	2113-12-13 18:33	> 1 w	0.0924908	0.0038691	0.4962658

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Stationary Points

Ecc. an. ast.	Ecc. an. Earth	Distance in au	Classification
52.39653250	331.42801807	0.00126051	MINIMUM
300.31520596	163.74908328	0.07980545	MINIMUM
355.02424211	245.18055396	0.37181426	SADDLE
177.82442598	70.78473093	1.12316782	SADDLE
357.04984899	68.72580824	1.70780049	SADDLE
179.71977048	251.95920682	3.01728770	MAXIMUM

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MOID Plots

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

Level lines of the squared distance function

2025XU1

Date in UTC	MJD	σ	σ_imp	Distance ± Width in RE	Stretching in RE	IP	Impact energy	PS	TS
2067-12-08.180	76357.180	0.576	0.000	0.48 ± 0.001	2.66E6	2.83E-7	1.00E0	-6.65	0


Based on 65 optical observations (of which 1 are rejected as outliers) from 2025/12/08.204 to 2025/12/23.461.
Coordinates are given on the Target Plane.
Unit is one Earth radius, but impact cross section has radius between 1.21 and 1.21 Earth radii.
Coordinates for LOV = EQU scaled= 1 second= F.
Aegis software version= 5.0, Date of computation=20260331 131609.852 UTC.

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Download Impactor Table as: