Asteroids

2025OU12 help

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

Orbital Properties

Epoch

61200.0

MJD

Orbit type

Aten

Perihelion (q)

0.656

Aphelion (Q)

1.053

Eccentricity (e)

0.232

Inclination (i)

2.3

deg

Orbit period (P)

288.4

Earth MOID

0.00693

U parameter

6.8

Next Earth close approach

Date

2036-06-04

Nominal distance (from Earth center)

0.17876

26742598

Maximum Brightness

28.2

mag

Risk

Object is not in risk list

Physical Properties

Absolute Magnitude (H)

28.5

mag

Diameter

5 - 12*

Taxonomic type

Rotation period (T)

Discovery Information

Discovery Date

2025-07-29

Observatory

Pan-STARRS 2, Haleakala

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

0.854355

1-sigma variation

0.000066

Unit

Eccentricity (e)

Value

0.232336

1-sigma variation

0.000117

Unit

Inclination (i)

Value

2.3481

1-sigma variation

0.0016

Unit

Long. of Ascending Node (Ω)

Value

305.3183

1-sigma variation

0.0006

Unit

Arg. of Perihelion (ω)

Value

161.0727

1-sigma variation

0.0020

Unit

Mean Anomaly (M)

Value

243.31893

1-sigma variation

0.04819

Unit

Perihelion distance

Value

0.655857

1-sigma variation

Unit

Aphelion distance

Value

1.052852

1-sigma variation

Unit

Asc. Node-Earth Sep.

Value

0.020142

1-sigma variation

Unit

Desc. Node-Earth Sep.

Value

-0.321937

1-sigma variation

Unit

MOID

Value

0.006934

1-sigma variation

Unit

Orbit Period

Value

288.4401

1-sigma variation

Unit

U parameter

Value

6.8

1-sigma variation

Unit

Covariance Matrix

	a	e	i	Ω	ω	M
a	4.33949E-9	-7.68619E-9	-1.05104E-7	-4.04462E-8	-1.26562E-7	-3.17400E-6
e	-7.68619E-9	1.36167E-8	1.86166E-7	7.16320E-8	2.23229E-7	5.62344E-6
i	-1.05104E-7	1.86166E-7	2.54602E-6	9.79906E-7	3.06438E-6	7.68769E-5
Ω	-4.04462E-8	7.16320E-8	9.79906E-7	3.77309E-7	1.18176E-6	2.95792E-5
ω	-1.26562E-7	2.23229E-7	3.06438E-6	1.18176E-6	4.00848E-6	9.20359E-5
M	-3.17400E-6	5.62344E-6	7.68769E-5	2.95792E-5	9.20359E-5	2.32244E-3

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

28.47

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

5 - 12*

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

311

Unit

Source

[1]

Normalized RMS of residuals

Value

0.693521

Unit

Source

[1]

Astrometry Summary

First Observation
Last Observation
Total Optical Observations (Discarded)

Optical

Value

Unit

Source

First Observation

Value

2025-07-29.405425

Unit

Source

[2]

Last Observation

Value

2025-08-01.313834

Unit

Source

[2]

Total Optical Observations (Discarded)

Value

21 (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 2025OU12 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	1954-06-07 05:44	> 1 mo	0.0402726	0.0330955	0.3554403
EARTH	1958-08-13 23:14	> 1 d	0.1203091	0.0069560	0.7000556
EARTH	1969-06-12 22:13	> 1 mo	0.0324593	0.0324314	0.0054793
EARTH	1973-08-13 16:23	> 1 d	0.1300452	0.0084670	0.1344573
EARTH	1984-06-03 12:52	323.1	0.0768865	0.0354193	0.0234540
EARTH	1988-08-10 21:44	> 1 d	0.0191201	0.0060411	0.0075052
EARTH	1999-06-20 11:35	946.9	0.0331097	0.0318871	0.0004661
EARTH	2010-06-04 13:02	34.1	0.1063301	0.0925451	0.0046293
EARTH	2014-08-14 04:34	101.6	0.0744728	0.0559299	0.0061964
EARTH	2025-08-03 01:38	< 1 min	0.0149815	0.0149558	0.0000086
EARTH	2036-06-04 00:26	223.9	0.1787632	0.1557164	0.0077037
EARTH	2040-07-23 16:41	> 1 d	0.0300976	0.0189534	0.0040273
VENUS	2052-09-16 19:38	> 1 d	0.0479244	0.0467483	0.0015896
EARTH	2055-06-05 13:58	> 1 d	0.0393441	0.0305921	0.0073381
EARTH	2059-08-11 22:47	> 1 d	0.0357369	0.0086139	0.0185174
VENUS	2069-04-24 00:05	> 1 w	0.0459495	0.0458209	0.0027843
EARTH	2070-06-03 16:17	835.7	0.1729226	0.0387502	0.0480370
EARTH	2074-07-20 12:34	> 1 mo	0.0325474	0.0174542	0.0299337
EARTH	2089-06-29 04:16	> 1 d	0.0365748	0.0332328	0.0015822
EARTH	2104-06-28 05:15	> 1 mo	0.0362527	0.0344036	0.0111065
EARTH	2108-08-11 03:59	> 1 d	0.1814852	0.0129959	0.0907251
EARTH	2119-06-06 15:38	> 1 w	0.0362164	0.0295272	0.0612194
EARTH	2123-08-12 19:46	> 1 d	0.0519658	0.0116751	0.1518259

Download as:

Stationary Points

Ecc. an. ast.	Ecc. an. Earth	Distance in au	Classification
214.83064756	213.42613572	0.00670287	MINIMUM
148.62982658	159.77693933	0.02983963	MINIMUM
175.95177869	181.93624858	0.03779938	SADDLE
0.19667499	5.21085990	0.32794432	SADDLE
0.56125488	185.65579447	1.67389816	SADDLE
180.43207732	5.52678250	2.03645940	MAXIMUM

Download:

MOID Plots

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