Asteroids

2025UR12 help

Last update: 2026-06-04 23:11 UTC

Orbital Properties

Epoch

61200.0

MJD

Orbit type

Apollo

Perihelion (q)

0.946

Aphelion (Q)

1.423

Eccentricity (e)

0.201

Inclination (i)

8.3

deg

Orbit period (P)

470.9

Earth MOID

0.00939

U parameter

6.6

Next Earth close approach

Date

2034-12-22

Nominal distance (from Earth center)

0.13199

19746128

Maximum Brightness

27.3

mag

Risk

Object is not in risk list

Physical Properties

Absolute Magnitude (H)

28.1

mag

Diameter

6 - 14*

Taxonomic type

Rotation period (T)

Discovery Information

Discovery Date

2025-10-30

Observatory

University of Arizona Mt. Lemmon 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

1.184574

1-sigma variation

0.000106

Unit

Eccentricity (e)

Value

0.201317

1-sigma variation

0.000079

Unit

Inclination (i)

Value

8.2795

1-sigma variation

0.0029

Unit

Long. of Ascending Node (Ω)

Value

39.7712

1-sigma variation

0.0002

Unit

Arg. of Perihelion (ω)

Value

49.4047

1-sigma variation

0.0029

Unit

Mean Anomaly (M)

Value

133.88178

1-sigma variation

0.01494

Unit

Perihelion distance

Value

0.946099

1-sigma variation

Unit

Aphelion distance

Value

1.423050

1-sigma variation

Unit

Asc. Node-Earth Sep.

Value

0.012168

1-sigma variation

Unit

Desc. Node-Earth Sep.

Value

0.300716

1-sigma variation

Unit

MOID

Value

0.009385

1-sigma variation

Unit

Orbit Period

Value

470.9143

1-sigma variation

Unit

U parameter

Value

6.6

1-sigma variation

Unit

Covariance Matrix

	a	e	i	Ω	ω	M
a	1.13420E-8	8.41557E-9	3.12543E-7	2.18310E-8	-3.06716E-7	-1.59098E-6
e	8.41557E-9	6.24523E-9	2.31936E-7	1.62031E-8	-2.27137E-7	-1.18073E-6
i	3.12543E-7	2.31936E-7	8.61450E-6	6.01729E-7	-8.43666E-6	-4.38503E-5
Ω	2.18310E-8	1.62031E-8	6.01729E-7	4.20578E-8	-5.88278E-7	-3.06352E-6
ω	-3.06716E-7	-2.27137E-7	-8.43666E-6	-5.88278E-7	8.48440E-6	4.29143E-5
M	-1.59098E-6	-1.18073E-6	-4.38503E-5	-3.06352E-6	4.29143E-5	2.23235E-4

Date of computation: 2026-06-04 23:11 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

28.077

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

6 - 14*

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

253

Unit

Source

[1]

Normalized RMS of residuals

Value

0.499931

Unit

Source

[1]

Astrometry Summary

First Observation
Last Observation
Total Optical Observations (Discarded)

Optical

Value

Unit

Source

First Observation

Value

2025-10-30.263556

Unit

Source

[2]

Last Observation

Value

2025-11-03.320212

Unit

Source

[2]

Total Optical Observations (Discarded)

Value

41 (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

Filters

Initial Date: *

Final Date: *

Normalised Only accepted

Max residual (arcsec):

* - these fields are required

Plot

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 2025UR12 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	1960-11-10 00:57	> 1 mo	0.0381810	0.0060246	0.6911325
EARTH	1961-03-06 16:35	> 1 mo	0.1916972	0.1669191	0.3520194
EARTH	1974-02-13 09:22	> 1 w	0.1917304	0.1454266	0.3518619
EARTH	1990-11-04 05:18	> 1 d	0.0113592	0.0091864	0.0126335
EARTH	2013-02-05 16:21	> 1 d	0.1487977	0.1444496	0.0024967
EARTH	2025-11-04 01:23	< 1 min	0.0115179	0.0115053	0.0000042
EARTH	2034-12-22 19:22	> 1 d	0.1319947	0.1195398	0.0043785
EARTH	2065-11-01 02:45	> 1 d	0.0373295	0.0091323	0.0223372
EARTH	2074-11-04 11:07	> 1 w	0.0116229	0.0104577	0.0309037
EARTH	2098-02-21 13:39	> 1 mo	0.1567800	0.1401268	1.9840049
EARTH	2106-11-09 06:04	> 1 mo	0.0273355	0.0099675	4.7647786
EARTH	2107-03-22 02:01	> 1 mo	0.1958825	0.1611248	2.7208056
EARTH	2115-11-02 21:22	> 1 mo	0.0347979	0.0100279	17.4919608

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Stationary Points

Ecc. an. ast.	Ecc. an. Earth	Distance in au	Classification
320.99889403	301.75180251	0.00973761	MINIMUM
186.38445931	172.73918787	0.42878471	SADDLE
0.44295103	168.37248114	1.96085556	SADDLE
178.00027377	345.81142728	2.40480991	MAXIMUM

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MOID Plots

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