Asteroids

2025UU1 help

Last update: 2025-10-29 13:00 UTC

Orbital Properties

Epoch

61000.0

MJD

Orbit type

Apollo

Perihelion (q)

0.865

Aphelion (Q)

3.053

Eccentricity (e)

0.559

Inclination (i)

8.4

deg

Orbit period (P)

1001.4

Earth MOID

0.03329

U parameter

8.4

Next Earth close approach

Date

2078-02-14

Nominal distance (from Earth center)

0.13788

20626244

Maximum Brightness

mag

Risk

Object is not in risk list

Physical Properties

Absolute Magnitude (H)

25.7

mag

Diameter

20 - 40*

Taxonomic type

Rotation period (T)

Discovery Information

Discovery Date

2025-10-20

Observatory

GINOP-KHK, Piszkesteto

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

1.958833

1-sigma variation

0.004836

Unit

Eccentricity (e)

Value

0.558533

1-sigma variation

0.001160

Unit

Inclination (i)

Value

8.4131

1-sigma variation

0.0143

Unit

Long. of Ascending Node (Ω)

Value

23.1522

1-sigma variation

0.0018

Unit

Arg. of Perihelion (ω)

Value

64.7193

1-sigma variation

0.0046

Unit

Mean Anomaly (M)

Value

355.19347

1-sigma variation

0.02600

Unit

Perihelion distance

Value

0.864761

1-sigma variation

Unit

Aphelion distance

Value

3.052906

1-sigma variation

Unit

Asc. Node-Earth Sep.

Value

0.091267

1-sigma variation

Unit

Desc. Node-Earth Sep.

Value

0.765581

1-sigma variation

Unit

MOID

Value

0.033291

1-sigma variation

Unit

Orbit Period

Value

1001.3702

1-sigma variation

Unit

U parameter

Value

8.4

1-sigma variation

Unit

Covariance Matrix

	a	e	i	Ω	ω	M
a	2.33871E-5	5.61194E-6	6.92595E-5	8.66837E-6	-2.23721E-5	1.25730E-4
e	5.61194E-6	1.34663E-6	1.66194E-5	2.08002E-6	-5.36796E-6	3.01699E-5
i	6.92595E-5	1.66194E-5	2.05110E-4	2.56730E-5	-6.62657E-5	3.72343E-4
Ω	8.66837E-6	2.08002E-6	2.56730E-5	3.21498E-6	-8.30423E-6	4.66032E-5
ω	-2.23721E-5	-5.36796E-6	-6.62657E-5	-8.30423E-6	2.15565E-5	-1.20299E-4
M	1.25730E-4	3.01699E-5	3.72343E-4	4.66032E-5	-1.20299E-4	6.75932E-4

Date of computation: 2025-10-29 13:00 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

25.655

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

20 - 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

Unit

Source

[1]

Unobserved

Value

Unit

Source

[1]

Normalized RMS of residuals

Value

0.808203

Unit

Source

[1]

Astrometry Summary

First Observation
Last Observation
Total Optical Observations (Discarded)

Optical

Value

Unit

Source

First Observation

Value

2025-10-18.398402

Unit

Source

[2]

Last Observation

Value

2025-10-26.420388

Unit

Source

[2]

Total Optical Observations (Discarded)

Value

27 (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 2025UU1 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	1982-02-09 05:26	> 1 mo	0.1348029	0.1345553	0.0241279
EARTH	1993-01-07 00:44	> 1 mo	0.1701361	0.1572032	0.0651561
EARTH	2003-11-27 03:29	> 1 mo	0.1407148	0.0170682	0.1959924
EARTH	2014-11-05 05:19	> 1 mo	0.0652136	0.0310310	0.1916949
MARS	2018-01-03 01:01	> 1 w	0.0307186	0.0033703	0.1411293
EARTH	2025-10-26 04:52	< 1 min	0.0414900	0.0412633	0.0000756
EARTH	2078-02-14 16:46	> 1 mo	0.1378779	0.1292312	0.2814600
EARTH	2089-01-24 06:58	> 1 mo	0.1522597	0.1307665	0.3653446
EARTH	2099-12-02 03:37	> 1 mo	0.1507776	0.0252883	0.6010037
EARTH	2110-10-30 03:44	> 1 mo	0.0394210	0.0390267	0.1870080
EARTH	2121-10-16 08:56	> 1 mo	0.1977405	0.0330783	5.7223872

Download as:

Stationary Points

Ecc. an. ast.	Ecc. an. Earth	Distance in au	Classification
330.47262294	294.64754691	0.03329133	MINIMUM
29.38034926	38.64990252	0.13125935	MINIMUM
4.55524651	355.04096241	0.17371407	SADDLE
359.98041071	166.56435460	1.87832249	SADDLE
180.23776867	166.37690451	2.04863410	SADDLE
179.71156685	346.09602638	4.03039717	MAXIMUM

Download:

MOID Plots

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