Asteroids

2025UA help

Last update: 2025-10-17 11:15 UTC

Orbital Properties

Epoch

61000.0

MJD

Orbit type

Aten

Perihelion (q)

0.638

Aphelion (Q)

1.024

Eccentricity (e)

0.232

Inclination (i)

1.1

deg

Orbit period (P)

276.7

Earth MOID

0.00406

U parameter

7.4

Next Earth close approach

Date

2028-09-10

Nominal distance (from Earth center)

0.10248

15330086

Maximum Brightness

26.3

mag

Risk

Object is in risk list

Physical Properties

Absolute Magnitude (H)

27.4

mag

Diameter

9 - 20*

Taxonomic type

Rotation period (T)

Discovery Information

Discovery Date

2025-10-16

Observatory

Kitt Peak-Bok

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

0.831024

1-sigma variation

0.000143

Unit

Eccentricity (e)

Value

0.232327

1-sigma variation

0.000215

Unit

Inclination (i)

Value

1.1477

1-sigma variation

0.0019

Unit

Long. of Ascending Node (Ω)

Value

210.8074

1-sigma variation

0.0106

Unit

Arg. of Perihelion (ω)

Value

345.1722

1-sigma variation

0.0393

Unit

Mean Anomaly (M)

Value

236.49032

1-sigma variation

0.06805

Unit

Perihelion distance

Value

0.637954

1-sigma variation

Unit

Aphelion distance

Value

1.024093

1-sigma variation

Unit

Asc. Node-Earth Sep.

Value

-0.364352

1-sigma variation

Unit

Desc. Node-Earth Sep.

Value

0.018956

1-sigma variation

Unit

MOID

Value

0.004064

1-sigma variation

Unit

Orbit Period

Value

276.7060

1-sigma variation

Unit

U parameter

Value

7.4

1-sigma variation

Unit

Covariance Matrix

	a	e	i	Ω	ω	M
a	2.04019E-8	-3.00213E-8	-5.86956E-9	-7.13254E-7	-3.99429E-6	5.10253E-6
e	-3.00213E-8	4.62086E-8	9.35394E-8	6.31491E-7	4.63085E-6	-4.89744E-6
i	-5.86956E-9	9.35394E-8	3.57515E-6	-1.74490E-5	-5.07380E-5	1.07595E-4
Ω	-7.13254E-7	6.31491E-7	-1.74490E-5	1.12296E-4	3.94760E-4	-7.15501E-4
ω	-3.99429E-6	4.63085E-6	-5.07380E-5	3.94760E-4	1.54838E-3	-2.60101E-3
M	5.10253E-6	-4.89744E-6	1.07595E-4	-7.15501E-4	-2.60101E-3	4.63100E-3

Date of computation: 2025-10-17 11:15 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

27.363

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

9 - 20*

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

0.9

Unit

Source

[1]

Unobserved

Value

1.0

Unit

Source

[1]

Normalized RMS of residuals

Value

0.276566

Unit

Source

[1]

Astrometry Summary

First Observation
Last Observation
Total Optical Observations (Discarded)

Optical

Value

Unit

Source

First Observation

Value

2025-10-16.239845

Unit

Source

[2]

Last Observation

Value

2025-10-17.124179

Unit

Source

[2]

Total Optical Observations (Discarded)

Value

26 (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 2025UA 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
VENUS	1958-12-04 13:42	> 1 mo	0.0160829	0.0159628	0.0402073
EARTH	1963-11-14 14:02	780.5	0.1286796	0.0081541	0.0410880
EARTH	1966-11-11 07:30	> 1 w	0.0228545	0.0008368	0.1802948
EARTH	1969-11-01 04:29	> 1 w	0.0112329	0.0007362	0.0356746
EARTH	1972-09-18 11:52	> 1 d	0.0126756	0.0113668	0.0065540
VENUS	1975-07-09 21:32	> 1 w	0.0336851	0.0185876	0.0481470
EARTH	1975-09-12 12:02	885.9	0.1650874	0.0175859	0.0506791
EARTH	1997-11-13 05:42	580.0	0.0696265	0.0436681	0.0086573
EARTH	2000-10-22 13:06	> 1 d	0.0208022	0.0101103	0.0036803
EARTH	2003-09-12 18:25	1085.0	0.0514658	0.0131225	0.0150134
EARTH	2022-11-13 21:43	77.0	0.1103888	0.0965188	0.0046243
EARTH	2025-10-14 03:21	23.3	0.0257202	0.0256462	0.0000247
EARTH	2028-09-10 04:55	84.4	0.1024753	0.0892895	0.0044006
VENUS	2044-06-05 14:16	> 1 d	0.0194118	0.0170181	0.0066235
EARTH	2047-11-13 02:17	51.8	0.0869321	0.0070566	0.0319670
EARTH	2050-10-21 17:39	> 1 w	0.0206228	0.0071624	0.0115661
EARTH	2053-09-10 21:01	534.0	0.0624232	0.0473400	0.0050821
EARTH	2075-11-12 03:27	> 1 d	0.0747644	0.0053544	0.0940323
EARTH	2078-10-18 10:14	> 1 w	0.0210334	0.0143792	0.0069411
EARTH	2081-09-10 18:55	> 1 d	0.0585571	0.0117067	0.0356762
EARTH	2100-11-11 04:57	> 1 d	0.1750157	0.0069959	0.3446283
EARTH	2103-11-06 23:42	> 1 mo	0.0103847	0.0046734	0.2283034
EARTH	2106-10-24 18:06	> 1 mo	0.0165270	0.0067680	0.5261871
EARTH	2109-09-25 03:21	> 1 mo	0.0120717	0.0094898	0.3543676
EARTH	2112-09-16 12:37	> 1 mo	0.0153683	0.0055758	0.4335538
EARTH	2115-09-11 08:24	> 1 w	0.1160990	0.0220211	1.4353663
VENUS	2117-01-10 21:00	> 1 mo	0.0223121	0.0192059	1.4389123

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Stationary Points

Ecc. an. ast.	Ecc. an. Earth	Distance in au	Classification
213.34114577	302.11044139	0.00406419	MINIMUM
155.40542474	256.11400307	0.01148002	MINIMUM
183.21431432	278.17173123	0.02576526	SADDLE
6.37721883	101.22455983	0.36516463	SADDLE
6.35875021	281.21136878	1.63626342	SADDLE
184.03199444	98.82075922	2.02683178	MAXIMUM

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MOID Plots

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

Level lines of the squared distance function

2025UA

Date in UTC	MJD	σ	Distance ± Width in RE	Stretching in RE	IP	Impact energy	PS
2097-09-17.869	87233.869	0.736	2.06 ± 3.904	3.87E7	1.70E-8	4.03E-2	-9.22
2110-09-18.548	91981.548	-1.875	2.31 ± 2.651	5.47E6	3.08E-8	4.06E-2	-9.03
2113-09-18.415	93077.415	0.570	2.60 ± 0.341	1.13E8	3.80E-9	4.05E-2	-9.96
2119-09-23.290	95273.290	-0.776	2.62 ± 4.043	2.73E6	1.88E-7	4.04E-2	-8.29
2123-09-17.951	96728.951	0.570	2.32 ± 0.192	3.41E8	3.35E-9	4.07E-2	-10.05


Based on 26 optical observations (of which 0 are rejected as outliers) from 2025/10/16.240 to 2025/10/17.124.
Coordinates are given on the Target Plane.
Unit is one Earth radius, but impact cross section has radius between 2.60 and 2.60 Earth radii.
Coordinates for LOV = EQU scaled= 1 second= F.
Aegis software version= 5.0, Date of computation=20251017 112841.552 UTC.

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Download Impactor Table as: