Asteroids

2025UU help

Last update: 2025-10-19 01:30 UTC

Orbital Properties

Epoch

61000.0

MJD

Orbit type

Aten

Perihelion (q)

0.703

Aphelion (Q)

1.284

Eccentricity (e)

0.292

Inclination (i)

19.0

deg

Orbit period (P)

361.6

Earth MOID

0.00915

U parameter

7.7

Next Earth close approach

Date

2025-10-25

Nominal distance (from Earth center)

0.01271

1901377

Maximum Brightness

17.3

mag

Risk

Object is not in risk list

Physical Properties

Absolute Magnitude (H)

25.3

mag

Diameter

23 - 50*

Taxonomic type

Rotation period (T)

Discovery Information

Discovery Date

2025-10-17

Observatory

Pleasant Groves Observatory

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

0.993297

1-sigma variation

0.000359

Unit

Eccentricity (e)

Value

0.292288

1-sigma variation

0.000539

Unit

Inclination (i)

Value

18.9897

1-sigma variation

0.0433

Unit

Long. of Ascending Node (Ω)

Value

210.7152

1-sigma variation

0.0028

Unit

Arg. of Perihelion (ω)

Value

289.5945

1-sigma variation

0.0364

Unit

Mean Anomaly (M)

Value

311.25543

1-sigma variation

0.08989

Unit

Perihelion distance

Value

0.702968

1-sigma variation

Unit

Aphelion distance

Value

1.283626

1-sigma variation

Unit

Asc. Node-Earth Sep.

Value

-0.178975

1-sigma variation

Unit

Desc. Node-Earth Sep.

Value

0.012292

1-sigma variation

Unit

MOID

Value

0.009146

1-sigma variation

Unit

Orbit Period

Value

361.5906

1-sigma variation

Unit

U parameter

Value

7.7

1-sigma variation

Unit

Covariance Matrix

	a	e	i	Ω	ω	M
a	1.29161E-7	1.93640E-7	1.54807E-5	-4.53466E-7	-1.30412E-5	3.22608E-5
e	1.93640E-7	2.90648E-7	2.32725E-5	-6.51043E-7	-1.95051E-5	4.83222E-5
i	1.54807E-5	2.32725E-5	1.87446E-3	-4.40079E-5	-1.54959E-3	3.84756E-3
Ω	-4.53466E-7	-6.51043E-7	-4.40079E-5	7.60932E-6	5.30970E-5	-1.24757E-4
ω	-1.30412E-5	-1.95051E-5	-1.54959E-3	5.30970E-5	1.32633E-3	-3.27070E-3
M	3.22608E-5	4.83222E-5	3.84756E-3	-1.24757E-4	-3.27070E-3	8.08050E-3

Date of computation: 2025-10-19 01:30 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

25.287

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

23 - 50*

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

0.577097

Unit

Source

[1]

Astrometry Summary

First Observation
Last Observation
Total Optical Observations (Discarded)

Optical

Value

Unit

Source

First Observation

Value

2025-10-17.15418

Unit

Source

[2]

Last Observation

Value

2025-10-19.014381

Unit

Source

[2]

Total Optical Observations (Discarded)

Value

26 (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

Close Approaches for 2025UU 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	2011-05-15 20:13	> 1 d	0.1669804	0.1505738	0.0210503
EARTH	2012-05-08 06:03	> 1 d	0.1472380	0.1468995	0.0026633
EARTH	2013-04-30 12:32	> 1 d	0.1579785	0.1497705	0.0132910
EARTH	2014-04-21 11:39	> 1 d	0.1913869	0.1627408	0.0202366
EARTH	2023-10-26 13:50	253.9	0.1580702	0.1391132	0.0063259
EARTH	2024-10-26 09:44	20.8	0.0829251	0.0731362	0.0032669
EARTH	2025-10-25 11:27	5.2	0.0127099	0.0126227	0.0000291
EARTH	2026-10-24 01:39	134.8	0.0539603	0.0442034	0.0032643
EARTH	2027-10-22 05:02	289.2	0.1194729	0.1005318	0.0063178
EARTH	2028-10-19 01:07	434.7	0.1866511	0.1590734	0.0091946
EARTH	2098-05-15 11:40	> 1 w	0.1656099	0.1499508	0.0770709
EARTH	2099-05-09 18:26	> 1 w	0.1476765	0.1468789	0.0177480
EARTH	2100-05-03 06:18	> 1 w	0.1531503	0.1484298	0.0444215
EARTH	2101-04-25 15:53	> 1 w	0.1783271	0.1570309	0.0863075
EARTH	2112-10-27 02:58	> 1 d	0.1500279	0.0181675	0.2208839
EARTH	2113-10-27 21:27	> 1 d	0.0871282	0.0118792	0.2228255
EARTH	2114-10-27 07:31	> 1 d	0.0270105	0.0105811	0.2010537
EARTH	2115-10-26 06:55	> 1 d	0.0307351	0.0107184	0.1514395
EARTH	2116-10-23 16:21	> 1 d	0.0913251	0.0111095	0.0686942
EARTH	2117-10-21 17:12	909.1	0.1559082	0.0804509	0.0251878

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Stationary Points

Ecc. an. ast.	Ecc. an. Earth	Distance in au	Classification
268.40959123	291.35527273	0.00914573	MINIMUM
70.44000790	124.51177289	0.14573117	MINIMUM
351.07642007	26.73418595	0.39014268	SADDLE
168.26813928	211.34768076	0.45234757	SADDLE
359.21624936	218.00253154	1.69697539	SADDLE
185.18619959	44.59256760	2.24523533	MAXIMUM

Download:

MOID Plots

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