Asteroids

2025TU1 help

Last update: 2026-03-17 23:26 UTC

Orbital Properties

Epoch

61200.0

MJD

Orbit type

Aten

Perihelion (q)

0.514

Aphelion (Q)

1.075

Eccentricity (e)

0.353

Inclination (i)

2.1

deg

Orbit period (P)

258.7

Earth MOID

0.00044

U parameter

6.8

Next Earth close approach

Date

2037-08-17

Nominal distance (from Earth center)

0.03238

4843547

Maximum Brightness

mag

Risk

Object is not in risk list

Physical Properties

Absolute Magnitude (H)

26.6

mag

Diameter

13 - 28*

Taxonomic type

Rotation period (T)

Discovery Information

Discovery Date

2025-10-02

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

61200.0000

1-sigma variation

Unit

MJD

Semimajor Axis

Value

0.794642

1-sigma variation

0.000052

Unit

Eccentricity (e)

Value

0.352935

1-sigma variation

0.000128

Unit

Inclination (i)

Value

2.1252

1-sigma variation

0.0010

Unit

Long. of Ascending Node (Ω)

Value

22.4406

1-sigma variation

0.0005

Unit

Arg. of Perihelion (ω)

Value

148.3216

1-sigma variation

0.0027

Unit

Mean Anomaly (M)

Value

205.50298

1-sigma variation

0.04009

Unit

Perihelion distance

Value

0.514184

1-sigma variation

Unit

Aphelion distance

Value

1.075099

1-sigma variation

Unit

Asc. Node-Earth Sep.

Value

-0.002907

1-sigma variation

Unit

Desc. Node-Earth Sep.

Value

-0.467345

1-sigma variation

Unit

MOID

Value

0.000435

1-sigma variation

Unit

Orbit Period

Value

258.7351

1-sigma variation

Unit

U parameter

Value

6.8

1-sigma variation

Unit

Covariance Matrix

	a	e	i	Ω	ω	M
a	2.71302E-9	-6.64872E-9	-5.43021E-8	2.67617E-8	-1.40023E-7	-2.08808E-6
e	-6.64872E-9	1.62940E-8	1.33080E-7	-6.55889E-8	3.43133E-7	5.11727E-6
i	-5.43021E-8	1.33080E-7	1.08712E-6	-5.36152E-7	2.80275E-6	4.17947E-5
Ω	2.67617E-8	-6.55889E-8	-5.36152E-7	2.65353E-7	-1.38203E-6	-2.05986E-5
ω	-1.40023E-7	3.43133E-7	2.80275E-6	-1.38203E-6	7.22962E-6	1.07764E-4
M	-2.08808E-6	5.11727E-6	4.17947E-5	-2.05986E-5	1.07764E-4	1.60712E-3

Date of computation: 2026-03-17 23:26 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

26.61

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

13 - 28*

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

187

Unit

Source

[1]

Normalized RMS of residuals

Value

0.550163

Unit

Source

[1]

Astrometry Summary

First Observation
Last Observation
Total Optical Observations (Discarded)

Optical

Value

Unit

Source

First Observation

Value

2025-10-02.466231

Unit

Source

[2]

Last Observation

Value

2025-10-14.4168

Unit

Source

[2]

Total Optical Observations (Discarded)

Value

37 (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

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 2025TU1 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	1950-10-18 12:32	> 1 d	0.0991132	0.0023521	0.5494632
EARTH	1957-08-16 04:44	> 1 w	0.0338961	0.0329550	0.0267795
EARTH	1962-10-13 10:22	> 1 w	0.0187231	0.0027922	0.0816867
VENUS	1963-11-08 07:45	> 1 d	0.0190958	0.0150400	0.0761590
EARTH	1967-10-17 16:55	> 1 d	0.1690147	0.0022082	0.1005005
VENUS	1973-01-28 15:18	> 1 d	0.0221424	0.0150453	0.0806361
EARTH	1974-08-13 14:29	965.8	0.0715556	0.0330995	0.0654950
EARTH	1979-09-09 22:23	> 1 w	0.0721152	0.0595847	0.0050655
VENUS	1981-05-15 17:15	> 1 d	0.0426368	0.0209802	0.0300261
EARTH	1984-10-16 13:28	1010.0	0.0158448	0.0017855	0.0108516
EARTH	1991-08-14 06:12	111.2	0.1068241	0.0826277	0.0081855
VENUS	1996-06-15 15:57	313.8	0.0201254	0.0149189	0.0034248
EARTH	1996-09-20 10:35	> 1 d	0.0695419	0.0682843	0.0004225
EARTH	2001-10-17 04:07	9.2	0.1590627	0.1586192	0.0001478
EARTH	2008-08-25 00:10	> 1 d	0.0505098	0.0448045	0.0020099
VENUS	2009-09-01 11:06	494.4	0.0414204	0.0258388	0.0060211
EARTH	2013-10-17 23:26	138.5	0.0564211	0.0375525	0.0062895
EARTH	2020-08-15 07:09	207.3	0.0367829	0.0340279	0.0010705
EARTH	2025-10-13 10:00	< 1 s	0.0152298	0.0152112	0.0000062
EARTH	2037-08-17 03:51	757.6	0.0323771	0.0321599	0.0005065
VENUS	2038-11-25 14:15	523.6	0.0381333	0.0181451	0.0080892
EARTH	2042-10-05 09:41	> 1 d	0.0483919	0.0345248	0.0046272
VENUS	2047-03-10 08:30	675.5	0.0353756	0.0227945	0.0080815
EARTH	2047-10-17 22:03	217.3	0.1424599	0.1193967	0.0076884
EARTH	2054-08-14 15:57	24.2	0.0447715	0.0416559	0.0011041
EARTH	2059-09-25 00:17	> 1 d	0.0664455	0.0628631	0.0011981
VENUS	2062-04-15 03:09	368.1	0.0436701	0.0258441	0.0063504
EARTH	2064-10-18 04:00	7.9	0.0830992	0.0632142	0.0066284
VENUS	2071-07-05 15:37	393.2	0.0198149	0.0169120	0.0034368
EARTH	2071-08-14 07:58	77.5	0.1412655	0.1262508	0.0050201
EARTH	2076-08-26 03:30	> 1 d	0.0535130	0.0409423	0.0047915
VENUS	2079-10-18 22:44	1294.5	0.0241430	0.0232935	0.0051383
EARTH	2081-10-14 00:55	> 1 d	0.0097812	0.0020777	0.0232112
EARTH	2086-10-18 04:13	> 1 d	0.0968530	0.0030287	0.2117564
VENUS	2089-12-19 08:40	> 1 w	0.0298912	0.0173701	0.3506964
EARTH	2098-08-13 18:33	> 1 d	0.1640328	0.0313178	0.2139807
VENUS	2102-07-26 13:34	> 1 d	0.0437120	0.0233991	0.1238856
VENUS	2103-07-01 16:11	> 1 d	0.0302227	0.0171701	0.1008110
EARTH	2103-08-13 23:09	> 1 d	0.0817707	0.0305929	0.0919683
EARTH	2108-08-16 11:13	> 1 d	0.0306116	0.0306108	0.0000489
EARTH	2113-08-28 17:38	> 1 mo	0.0584702	0.0340906	0.1368790
VENUS	2116-02-06 20:59	> 1 mo	0.0432876	0.0238957	0.5081191
VENUS	2117-01-12 01:24	> 1 w	0.0282480	0.0181997	0.4799079
EARTH	2118-09-17 01:17	> 1 mo	0.0724336	0.0647692	0.0262241
EARTH	2123-10-08 03:04	> 1 mo	0.0439802	0.0046087	0.3167448

Download as:

Stationary Points

Ecc. an. ast.	Ecc. an. Earth	Distance in au	Classification
223.72563934	281.44464106	0.00040843	MINIMUM
141.95126712	223.32270734	0.03217910	MINIMUM
180.96028376	251.01051257	0.07144917	SADDLE
4.73744073	74.46600094	0.48132524	SADDLE
4.89893944	254.68024036	1.52019602	SADDLE
182.35741446	71.97207375	2.07006001	MAXIMUM

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MOID Plots

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