Asteroids

2025UO8 help

Last update: 2025-11-03 13:00 UTC

Orbital Properties

Epoch

61000.0

MJD

Orbit type

Aten

Perihelion (q)

0.764

Aphelion (Q)

1.050

Eccentricity (e)

0.158

Inclination (i)

12.3

deg

Orbit period (P)

315.5

Earth MOID

0.03910

U parameter

6.8

Next Earth close approach

Date

2031-09-30

Nominal distance (from Earth center)

0.19131

28620265

Maximum Brightness

24.2

mag

Risk

Object is not in risk list

Physical Properties

Absolute Magnitude (H)

25.2

mag

Diameter

24 - 50*

Taxonomic type

Rotation period (T)

Discovery Information

Discovery Date

2025-10-27

Observatory

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

61000.0000

1-sigma variation

Unit

MJD

Semimajor Axis

Value

0.907038

1-sigma variation

0.000070

Unit

Eccentricity (e)

Value

0.157650

1-sigma variation

0.000216

Unit

Inclination (i)

Value

12.2907

1-sigma variation

0.0263

Unit

Long. of Ascending Node (Ω)

Value

38.3861

1-sigma variation

0.0043

Unit

Arg. of Perihelion (ω)

Value

156.2586

1-sigma variation

0.0053

Unit

Mean Anomaly (M)

Value

237.39445

1-sigma variation

0.02231

Unit

Perihelion distance

Value

0.764044

1-sigma variation

Unit

Aphelion distance

Value

1.050032

1-sigma variation

Unit

Asc. Node-Earth Sep.

Value

0.040933

1-sigma variation

Unit

Desc. Node-Earth Sep.

Value

-0.235546

1-sigma variation

Unit

MOID

Value

0.039102

1-sigma variation

Unit

Orbit Period

Value

315.5271

1-sigma variation

Unit

U parameter

Value

6.8

1-sigma variation

Unit

Covariance Matrix

	a	e	i	Ω	ω	M
a	4.90151E-9	-1.51106E-8	-1.83510E-6	-3.02115E-7	3.71177E-7	-1.56051E-6
e	-1.51106E-8	4.66493E-8	5.67292E-6	9.33833E-7	-1.14686E-6	4.81805E-6
i	-1.83510E-6	5.67292E-6	6.90771E-4	1.13696E-4	-1.39547E-4	5.85924E-4
Ω	-3.02115E-7	9.33833E-7	1.13696E-4	1.87140E-5	-2.29704E-5	9.64507E-5
ω	3.71177E-7	-1.14686E-6	-1.39547E-4	-2.29704E-5	2.82829E-5	-1.18553E-4
M	-1.56051E-6	4.81805E-6	5.85924E-4	9.64507E-5	-1.18553E-4	4.97749E-4

Date of computation: 2025-11-03 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

25.198

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

24 - 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

[-]

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

0.625982

Unit

Source

[1]

Astrometry Summary

First Observation
Last Observation
Total Optical Observations (Discarded)

Optical

Value

Unit

Source

First Observation

Value

2025-10-27.306665

Unit

Source

[2]

Last Observation

Value

2025-11-03.44215

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 2025UO8 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	1955-10-22 21:28	> 1 d	0.0924562	0.0569453	0.0265066
VENUS	1963-02-16 05:22	229.8	0.0455088	0.0442209	0.0056056
EARTH	1974-10-31 13:17	> 1 d	0.0485926	0.0402399	0.0145929
EARTH	1987-11-14 05:47	612.5	0.1624271	0.0805687	0.0300389
EARTH	1993-10-20 03:25	> 1 d	0.1023926	0.0635031	0.0192102
VENUS	2003-09-24 07:27	150.0	0.0450567	0.0450368	0.0000137
EARTH	2006-11-12 04:43	556.4	0.1070009	0.0801136	0.0094834
EARTH	2012-10-12 07:34	> 1 d	0.1360600	0.1186943	0.0060550
EARTH	2025-11-06 17:15	< 1 min	0.0457759	0.0455087	0.0000891
EARTH	2031-09-30 07:05	629.4	0.1913147	0.1829133	0.0028695
VENUS	2044-05-01 09:42	109.7	0.0440488	0.0438418	0.0010709
EARTH	2044-11-08 07:05	995.7	0.0599728	0.0444600	0.0070764
EARTH	2050-10-12 16:04	> 1 d	0.1350329	0.0928550	0.0172263
EARTH	2063-11-12 09:58	> 1 d	0.0997863	0.0508427	0.0317419
EARTH	2069-10-13 16:25	> 1 d	0.1286080	0.0831514	0.0217007
EARTH	2082-11-12 05:07	640.0	0.1016354	0.0753392	0.0092981
EARTH	2088-10-17 02:16	501.0	0.1120449	0.1056609	0.0021568
VENUS	2097-11-07 23:13	480.5	0.0448559	0.0430166	0.0074603
VENUS	2102-03-01 02:33	1187.8	0.0441631	0.0426872	0.0152216
EARTH	2107-11-09 19:26	> 1 w	0.0588860	0.0441022	0.0930778
EARTH	2113-10-13 11:08	> 1 w	0.1321973	0.0828915	0.1497384

Download as:

Stationary Points

Ecc. an. ast.	Ecc. an. Earth	Distance in au	Classification
211.46845827	301.11244836	0.03910203	MINIMUM
50.32922222	149.79364593	0.22757773	MINIMUM
76.85778609	178.61182170	0.22902879	SADDLE
328.70210980	56.49162951	0.26336665	SADDLE
5.20853798	278.54298571	1.76168050	SADDLE
187.96484479	101.43730585	2.05167172	MAXIMUM

Download:

MOID Plots

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