Asteroids

2025UB help

Last update: 2025-10-17 11:30 UTC

Orbital Properties

Epoch

61000.0

MJD

Orbit type

Apollo

Perihelion (q)

0.890

Aphelion (Q)

1.333

Eccentricity (e)

0.199

Inclination (i)

2.5

deg

Orbit period (P)

428.1

Earth MOID

0.00172

U parameter

7.0

Next Earth close approach

Date

2025-10-22

Nominal distance (from Earth center)

0.00822

1229718

Maximum Brightness

19.1

mag

Risk

Object is in risk list

Physical Properties

Absolute Magnitude (H)

27.2

mag

Diameter

10 - 21*

Taxonomic type

Rotation period (T)

Discovery Information

Discovery Date

2025-10-16

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

61000.0000

1-sigma variation

Unit

MJD

Semimajor Axis

Value

1.111676

1-sigma variation

0.000166

Unit

Eccentricity (e)

Value

0.199472

1-sigma variation

0.000248

Unit

Inclination (i)

Value

2.4699

1-sigma variation

0.0059

Unit

Long. of Ascending Node (Ω)

Value

32.2868

1-sigma variation

0.0204

Unit

Arg. of Perihelion (ω)

Value

66.1845

1-sigma variation

0.0948

Unit

Mean Anomaly (M)

Value

335.91345

1-sigma variation

0.03969

Unit

Perihelion distance

Value

0.889928

1-sigma variation

Unit

Aphelion distance

Value

1.333424

1-sigma variation

Unit

Asc. Node-Earth Sep.

Value

-0.006397

1-sigma variation

Unit

Desc. Node-Earth Sep.

Value

0.153988

1-sigma variation

Unit

MOID

Value

0.001723

1-sigma variation

Unit

Orbit Period

Value

428.1203

1-sigma variation

Unit

U parameter

Value

7.0

1-sigma variation

Unit

Covariance Matrix

	a	e	i	Ω	ω	M
a	2.75800E-8	-6.25546E-9	-4.46417E-7	2.24847E-6	-1.08678E-5	5.61745E-6
e	-6.25546E-9	6.13109E-8	1.39592E-6	-4.22665E-6	1.92588E-5	-6.35684E-6
i	-4.46417E-7	1.39592E-6	3.52314E-5	-1.16809E-4	5.39009E-4	-2.00796E-4
Ω	2.24847E-6	-4.22665E-6	-1.16809E-4	4.14275E-4	-1.92845E-3	7.73348E-4
ω	-1.08678E-5	1.92588E-5	5.39009E-4	-1.92845E-3	8.99173E-3	-3.63874E-3
M	5.61745E-6	-6.35684E-6	-2.00796E-4	7.73348E-4	-3.63874E-3	1.57551E-3

Date of computation: 2025-10-17 11:30 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

27.215

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

10 - 21*

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

0.6

Unit

Source

[1]

Unobserved

Value

1.0

Unit

Source

[1]

Normalized RMS of residuals

Value

0.659984

Unit

Source

[1]

Astrometry Summary

First Observation
Last Observation
Total Optical Observations (Discarded)

Optical

Value

Unit

Source

First Observation

Value

2025-10-16.572271

Unit

Source

[2]

Last Observation

Value

2025-10-17.14584

Unit

Source

[2]

Total Optical Observations (Discarded)

Value

23 (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 2025UB 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	1952-10-20 17:58	> 1 mo	0.0117831	0.0043039	19.8515004
EARTH	1959-09-19 03:05	> 1 mo	0.1811002	0.0243378	10.8346239
EARTH	1959-12-29 00:46	> 1 mo	0.0998032	0.0967253	0.5137065
EARTH	1960-04-08 02:41	> 1 mo	0.1746453	0.0602110	10.5779741
EARTH	1967-03-09 04:08	> 1 mo	0.0339653	0.0302118	2.4200999
EARTH	1979-10-11 10:44	> 1 w	0.1536505	0.0094841	1.1432481
EARTH	1986-12-03 03:15	> 1 mo	0.0870570	0.0391825	0.5911625
EARTH	1994-03-11 20:00	> 1 mo	0.0603628	0.0301477	3.2435444
EARTH	2006-10-25 01:14	> 1 w	0.0108481	0.0028108	0.0596859
EARTH	2020-03-04 14:33	1247.9	0.0335314	0.0320243	0.0021551
EARTH	2025-10-22 14:48	10.5	0.0082202	0.0081788	0.0000138
EARTH	2032-09-20 04:19	> 1 w	0.1803354	0.1593463	0.0070082
EARTH	2032-12-29 18:36	> 1 w	0.1004195	0.0995287	0.0003005
EARTH	2033-04-09 05:17	> 1 w	0.1733605	0.1517386	0.0072964
EARTH	2040-03-09 16:00	> 1 d	0.0332699	0.0302684	0.0072987
EARTH	2052-10-11 13:27	> 1 d	0.1629085	0.0038802	0.0879980
EARTH	2059-12-01 23:38	> 1 mo	0.0852903	0.0275533	0.0453327
EARTH	2067-03-13 15:31	> 1 d	0.0641880	0.0300717	0.0692492
EARTH	2079-10-28 21:17	> 1 w	0.0233320	0.0006466	0.1130831
EARTH	2092-10-21 20:16	> 1 mo	0.0213059	0.0000832	1.4147528
EARTH	2100-02-15 18:23	> 1 mo	0.0733450	0.0274648	10.4784203
EARTH	2107-03-22 16:32	> 1 mo	0.1932496	0.0277905	25.3593214
EARTH	2119-10-24 14:12	> 1 mo	0.0092955	0.0000727	32.8214931

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Stationary Points

Ecc. an. ast.	Ecc. an. Earth	Distance in au	Classification
301.87608742	289.65396326	0.00172336	MINIMUM
59.50317333	66.24457337	0.03022230	MINIMUM
1.84145527	359.41308591	0.10076299	SADDLE
180.45300270	177.48375376	0.31862410	SADDLE
359.80965269	176.97354256	1.90770318	SADDLE
179.72169044	356.87944555	2.31655096	MAXIMUM

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MOID Plots

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

Level lines of the squared distance function

2025UB

Date in UTC	MJD	σ	Distance ± Width in RE	Stretching in RE	IP	Impact energy	PS	TS
2091-10-24.871	85078.871	1.079	2.06 ± 0.195	2.70E6	3.28E-7	5.15E-2	-7.82	0
2092-10-24.141	85444.141	0.036	1.70 ± 0.049	3.62E4	3.71E-5	5.16E-2	-5.77	0
2093-10-23.329	85808.329	-4.299	0.33 ± 0.683	3.70E6	4.70E-11	5.17E-2	-11.67	0
2093-10-23.993	85808.993	0.035	1.56 ± 0.000	7.17E7	2.35E-8	5.15E-2	-8.98	0
2094-10-24.740	86174.740	1.650	1.00 ± 0.189	8.66E4	5.16E-6	5.15E-2	-6.64	0
2096-10-23.320	86904.320	-1.701	0.70 ± 0.635	2.91E6	1.42E-7	5.16E-2	-8.21	0
2096-10-24.089	86905.089	0.715	0.46 ± 1.020	3.12E6	4.12E-7	5.15E-2	-7.75	0
2097-10-23.391	87269.391	-1.437	2.41 ± 0.253	4.27E7	3.30E-9	5.16E-2	-9.85	0
2097-10-23.706	87269.706	-1.672	0.89 ± 3.967	2.82E6	5.98E-8	5.17E-2	-8.59	0
2097-10-24.076	87270.076	0.940	1.48 ± 0.000	2.33E8	4.17E-9	5.15E-2	-9.75	0
2098-10-23.883	87634.883	1.157	0.62 ± 0.502	1.91E7	4.83E-8	5.15E-2	-8.69	0
2098-10-24.331	87635.331	0.047	1.18 ± 0.626	3.25E6	5.64E-7	5.16E-2	-7.62	0
2098-10-24.357	87635.357	0.902	2.36 ± 0.297	1.08E7	1.11E-7	5.15E-2	-8.33	0
2098-10-24.508	87635.508	0.845	2.32 ± 0.241	2.99E6	4.46E-7	5.15E-2	-7.73	0
2099-10-24.631	88000.631	1.032	1.97 ± 0.132	6.74E6	9.57E-8	5.14E-2	-8.40	0
2099-10-24.726	88000.726	0.020	1.46 ± 0.131	2.52E6	6.24E-7	5.15E-2	-7.59	0
2100-10-24.274	88365.274	-1.615	1.70 ± 0.042	2.65E7	1.46E-8	5.16E-2	-9.22	0
2100-10-24.578	88365.578	-2.146	1.05 ± 0.271	3.15E4	5.39E-6	5.17E-2	-6.66	0
2101-10-24.900	88730.900	1.968	2.29 ± 0.009	2.59E5	6.51E-7	5.15E-2	-7.58	0
2101-10-24.909	88730.909	4.251	0.86 ± 1.114	2.46E5	7.54E-10	5.14E-2	-10.52	0
2101-10-25.263	88731.263	0.870	1.46 ± 0.356	4.52E6	2.85E-7	5.15E-2	-7.94	0
2102-10-24.625	89095.625	-1.746	0.63 ± 0.180	2.58E6	1.55E-7	5.16E-2	-8.21	0
2102-10-24.917	89095.917	-1.736	2.12 ± 0.115	7.38E5	3.40E-7	5.16E-2	-7.87	0
2102-10-25.311	89096.311	0.613	2.08 ± 0.111	1.96E7	5.43E-8	5.15E-2	-8.66	0
2102-10-25.631	89096.631	1.640	0.36 ± 0.290	7.29E6	6.72E-8	5.15E-2	-8.57	0
2104-10-24.606	89826.606	-1.478	1.70 ± 0.204	1.93E6	2.30E-7	5.15E-2	-8.05	0
2106-10-24.564	90556.564	-4.297	1.56 ± 0.095	1.41E7	1.05E-11	5.17E-2	-12.40	0
2106-10-25.067	90557.067	0.980	0.97 ± 0.059	1.76E7	6.15E-8	5.16E-2	-8.63	0
2108-10-24.148	91287.148	1.057	2.25 ± 1.197	4.54E7	9.54E-9	5.15E-2	-9.45	0
2109-10-24.327	91652.327	-1.829	0.31 ± 2.524	1.67E7	1.14E-8	5.16E-2	-9.38	0
2110-10-25.299	92018.299	1.049	1.80 ± 0.071	7.44E6	1.44E-7	5.15E-2	-8.28	0
2110-10-25.358	92018.358	0.500	1.21 ± 0.025	2.24E5	6.52E-6	5.15E-2	-6.63	0
2112-10-24.982	92748.982	0.716	1.81 ± 0.155	1.39E8	7.21E-9	5.14E-2	-9.59	0
2114-10-25.333	93479.333	1.080	0.39 ± 0.141	4.09E7	2.57E-8	5.15E-2	-9.05	0
2114-10-25.393	93479.393	1.225	1.80 ± 0.170	5.11E6	1.17E-7	5.15E-2	-8.40	0
2115-10-25.510	93844.510	0.806	2.12 ± 0.033	2.06E6	3.20E-7	5.15E-2	-7.96	0
2116-10-24.587	94209.587	0.504	1.76 ± 0.112	3.88E6	3.36E-7	5.15E-2	-7.94	0
2116-10-24.766	94209.766	0.601	0.71 ± 0.813	2.47E6	5.98E-7	5.16E-2	-7.69	0
2116-10-24.950	94209.950	4.273	2.12 ± 0.020	1.84E5	5.65E-10	5.14E-2	-10.72	0
2117-10-24.717	94574.717	-1.444	1.77 ± 0.099	2.98E6	1.69E-7	5.16E-2	-8.25	0
2117-10-24.876	94574.876	0.499	1.72 ± 0.200	3.65E7	4.60E-8	5.16E-2	-8.81	0
2117-10-25.176	94575.176	4.663	1.40 ± 1.081	2.25E5	1.41E-10	5.14E-2	-11.33	0
2118-10-24.431	94939.431	-3.537	1.83 ± 0.152	1.62E7	1.52E-10	5.17E-2	-11.30	0
2118-10-25.082	94940.082	0.500	1.32 ± 0.000	1.74E8	9.52E-9	5.15E-2	-9.50	0
2119-10-24.587	95304.587	-3.617	1.69 ± 0.562	2.26E7	1.17E-10	5.17E-2	-11.42	0
2120-10-23.827	95669.827	-4.305	2.29 ± 0.255	5.82E5	9.38E-11	5.17E-2	-11.52	0
2120-10-24.658	95670.658	1.119	0.88 ± 0.237	1.82E6	5.21E-7	5.15E-2	-7.77	0
2120-10-24.673	95670.673	0.820	1.55 ± 0.030	1.25E7	9.07E-8	5.15E-2	-8.53	0
2120-10-24.844	95670.844	1.030	1.66 ± 0.211	3.87E7	2.16E-8	5.15E-2	-9.16	0
2122-10-24.158	96400.158	-2.567	1.99 ± 0.319	3.28E6	1.71E-8	5.17E-2	-9.26	0
2123-10-25.411	96766.411	4.277	1.02 ± 0.010	5.18E6	3.60E-11	5.13E-2	-11.95	0
2123-10-25.440	96766.440	1.213	1.54 ± 0.090	1.17E6	6.05E-7	5.15E-2	-7.72	0
2123-10-25.749	96766.749	1.667	2.12 ± 0.128	1.58E6	2.71E-7	5.14E-2	-8.07	0
2123-10-25.769	96766.769	1.667	2.19 ± 0.044	2.02E6	1.77E-7	5.15E-2	-8.26	0
2124-10-23.793	97130.793	-1.740	2.22 ± 0.181	6.00E6	4.77E-8	5.16E-2	-8.83	0
2125-10-24.330	97496.330	-3.415	1.99 ± 0.037	2.25E6	1.64E-9	5.17E-2	-10.30	n/a


Based on 23 optical observations (of which 0 are rejected as outliers) from 2025/10/16.572 to 2025/10/17.146.
Coordinates are given on the Target Plane.
Unit is one Earth radius, but impact cross section has radius between 2.40 and 2.40 Earth radii.
Coordinates for LOV = EQU scaled= 1 second= F.
Aegis software version= 5.0, Date of computation=20251017 114946.273 UTC.

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