Asteroids

2025UO help

Last update: 2025-10-19 13:53 UTC

Orbital Properties

Epoch

61000.0

MJD

Orbit type

Apollo

Perihelion (q)

0.987

Aphelion (Q)

1.103

Eccentricity (e)

0.056

Inclination (i)

9.7

deg

Orbit period (P)

390.2

Earth MOID

0.01823

U parameter

7.1

Next Earth close approach

Date

2040-04-30

Nominal distance (from Earth center)

0.16706

24991903

Maximum Brightness

24.8

mag

Risk

Object is not in risk list

Physical Properties

Absolute Magnitude (H)

mag

Diameter

17 - 40*

Taxonomic type

Rotation period (T)

Discovery Information

Discovery Date

2025-10-18

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

1.044965

1-sigma variation

0.000160

Unit

Eccentricity (e)

Value

0.055680

1-sigma variation

0.000155

Unit

Inclination (i)

Value

9.7048

1-sigma variation

0.0080

Unit

Long. of Ascending Node (Ω)

Value

23.0164

1-sigma variation

0.0006

Unit

Arg. of Perihelion (ω)

Value

296.3338

1-sigma variation

0.2608

Unit

Mean Anomaly (M)

Value

90.37052

1-sigma variation

0.23988

Unit

Perihelion distance

Value

0.986782

1-sigma variation

Unit

Aphelion distance

Value

1.103148

1-sigma variation

Unit

Asc. Node-Earth Sep.

Value

0.019549

1-sigma variation

Unit

Desc. Node-Earth Sep.

Value

0.064043

1-sigma variation

Unit

MOID

Value

0.018231

1-sigma variation

Unit

Orbit Period

Value

390.1676

1-sigma variation

Unit

U parameter

Value

7.1

1-sigma variation

Unit

Covariance Matrix

	a	e	i	Ω	ω	M
a	2.56055E-8	-1.91005E-8	-4.84988E-7	-9.36340E-8	3.99164E-5	-3.70708E-5
e	-1.91005E-8	2.40420E-8	1.09541E-6	6.14062E-8	-3.73122E-5	3.38122E-5
i	-4.84988E-7	1.09541E-6	6.44131E-5	1.13185E-6	-1.32125E-3	1.16415E-3
Ω	-9.36340E-8	6.14062E-8	1.13185E-6	3.51491E-7	-1.39431E-4	1.30214E-4
ω	3.99164E-5	-3.73122E-5	-1.32125E-3	-1.39431E-4	6.80267E-2	-6.25309E-2
M	-3.70708E-5	3.38122E-5	1.16415E-3	1.30214E-4	-6.25309E-2	5.75450E-2

Date of computation: 2025-10-19 13:53 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

26.034

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

17 - 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

[-]

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

0.7

Unit

Source

[1]

Unobserved

Value

Unit

Source

[1]

Normalized RMS of residuals

Value

0.359978

Unit

Source

[1]

Astrometry Summary

First Observation
Last Observation
Total Optical Observations (Discarded)

Optical

Value

Unit

Source

First Observation

Value

2025-10-18.232666

Unit

Source

[2]

Last Observation

Value

2025-10-18.88544

Unit

Source

[2]

Total Optical Observations (Discarded)

Value

51 (0)

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 2025UO 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	1960-04-26 03:12	363.8	0.0835302	0.0753695	0.0029443
EARTH	1960-10-20 00:51	393.9	0.1505456	0.1395892	0.0036592
EARTH	1976-04-20 14:54	772.0	0.0582445	0.0579674	0.0003015
EARTH	1976-10-15 00:53	169.5	0.0862064	0.0727363	0.0045189
EARTH	1992-04-23 00:52	1364.0	0.0623080	0.0577692	0.0041122
EARTH	1992-10-16 03:05	505.8	0.1208145	0.0890443	0.0106884
EARTH	2008-04-29 14:39	419.6	0.1811706	0.1211843	0.0209719
EARTH	2009-03-10 09:22	> 1 w	0.1799044	0.1464864	0.0135034
EARTH	2009-10-16 10:02	545.2	0.1251024	0.0594625	0.0221516
EARTH	2025-04-08 00:46	388.3	0.1021747	0.0993149	0.0009817
EARTH	2025-10-14 08:13	5.5	0.0197898	0.0197391	0.0000169
EARTH	2040-04-30 16:58	349.4	0.1670606	0.1176428	0.0175250
EARTH	2041-02-24 12:12	> 1 w	0.1972147	0.1748698	0.0090337
EARTH	2041-10-17 12:14	562.1	0.1750425	0.1096251	0.0218827
EARTH	2056-04-21 10:52	> 1 d	0.0612625	0.0608491	0.0018721
EARTH	2056-10-14 07:50	498.0	0.0917909	0.0317873	0.0213173
EARTH	2072-04-15 19:06	> 1 d	0.0699789	0.0620459	0.0147831
EARTH	2072-10-13 17:02	195.8	0.0459051	0.0191473	0.0328144
EARTH	2088-04-23 04:20	> 1 d	0.0666398	0.0596837	0.0168099
EARTH	2088-10-15 15:28	> 1 d	0.1277018	0.0266071	0.0367709
EARTH	2105-03-28 10:04	> 1 w	0.1401859	0.0927803	0.0797615
EARTH	2105-10-15 21:05	> 1 d	0.0667793	0.0177568	0.1112410
EARTH	2121-04-07 08:44	> 1 w	0.1067195	0.0731619	0.0959010
EARTH	2121-10-14 23:33	> 1 d	0.0258683	0.0174952	0.1139943

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Stationary Points

Ecc. an. ast.	Ecc. an. Earth	Distance in au	Classification
58.68189865	280.48522902	0.01823058	MINIMUM
254.33355475	108.32994517	0.05909452	MINIMUM
335.23892461	192.13011141	0.17197329	SADDLE
157.19428378	16.25980396	0.20935828	SADDLE
348.41212328	26.43693215	1.96661108	SADDLE
175.81283678	213.85853041	2.11165943	MAXIMUM

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MOID Plots

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