Asteroids

2025TU4 help

Last update: 2025-10-14 14:30 UTC

Orbital Properties

Epoch

61000.0

MJD

Orbit type

Apollo

Perihelion (q)

0.917

Aphelion (Q)

1.716

Eccentricity (e)

0.303

Inclination (i)

8.3

deg

Orbit period (P)

551.8

Earth MOID

0.03875

U parameter

8.4

Next Earth close approach

Date

2025-10-21

Nominal distance (from Earth center)

0.03947

5904201

Maximum Brightness

21.3

mag

Risk

Object is not in risk list

Physical Properties

Absolute Magnitude (H)

26.3

mag

Diameter

15 - 30*

Taxonomic type

Rotation period (T)

Discovery Information

Discovery Date

2025-10-03

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

1.316544

1-sigma variation

0.001883

Unit

Eccentricity (e)

Value

0.303189

1-sigma variation

0.001125

Unit

Inclination (i)

Value

8.2652

1-sigma variation

0.0286

Unit

Long. of Ascending Node (Ω)

Value

194.8792

1-sigma variation

0.0002

Unit

Arg. of Perihelion (ω)

Value

247.5679

1-sigma variation

0.0136

Unit

Mean Anomaly (M)

Value

349.94568

1-sigma variation

0.04464

Unit

Perihelion distance

Value

0.917383

1-sigma variation

Unit

Aphelion distance

Value

1.715706

1-sigma variation

Unit

Asc. Node-Earth Sep.

Value

0.350363

1-sigma variation

Unit

Desc. Node-Earth Sep.

Value

0.072035

1-sigma variation

Unit

MOID

Value

0.038747

1-sigma variation

Unit

Orbit Period

Value

551.7619

1-sigma variation

Unit

U parameter

Value

8.4

1-sigma variation

Unit

Covariance Matrix

	a	e	i	Ω	ω	M
a	3.54682E-6	2.11899E-6	5.38173E-5	-3.61772E-7	-2.55743E-5	8.40763E-5
e	2.11899E-6	1.26596E-6	3.21518E-5	-2.16026E-7	-1.52776E-5	5.02297E-5
i	5.38173E-5	3.21518E-5	8.16611E-4	-5.49447E-6	-3.88100E-4	1.27573E-3
Ω	-3.61772E-7	-2.16026E-7	-5.49447E-6	3.86846E-8	2.62410E-6	-8.57830E-6
ω	-2.55743E-5	-1.52776E-5	-3.88100E-4	2.62410E-6	1.84631E-4	-6.06280E-4
M	8.40763E-5	5.02297E-5	1.27573E-3	-8.57830E-6	-6.06280E-4	1.99301E-3

Date of computation: 2025-10-14 14:30 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

26.256

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

15 - 30*

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

0.512451

Unit

Source

[1]

Astrometry Summary

First Observation
Last Observation
Total Optical Observations (Discarded)

Optical

Value

Unit

Source

First Observation

Value

2025-10-03.252027

Unit

Source

[2]

Last Observation

Value

2025-10-14.16291

Unit

Source

[2]

Total Optical Observations (Discarded)

Value

18 (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 2025TU4 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	1957-10-08 02:46	> 1 w	0.1901088	0.0284420	0.3675745
EARTH	1960-10-17 03:44	> 1 mo	0.0542059	0.0366082	0.3644254
EARTH	1963-10-31 17:13	> 1 mo	0.0843273	0.0274471	0.4565320
EARTH	1967-01-05 06:07	> 1 mo	0.1477817	0.1425686	0.0694392
EARTH	1970-02-11 04:14	> 1 w	0.1365809	0.1266497	0.1971515
EARTH	2022-10-12 05:45	> 1 d	0.1325250	0.0336591	0.0394719
EARTH	2025-10-21 16:16	< 1 min	0.0394671	0.0390522	0.0001383
EARTH	2028-11-21 13:29	> 1 w	0.1286563	0.0562059	0.0252163
EARTH	2032-02-06 19:17	> 1 d	0.1277481	0.1254409	0.0144536
EARTH	2035-02-15 20:41	> 1 d	0.1721060	0.1233968	0.0865122
EARTH	2084-10-10 16:07	> 1 mo	0.1570409	0.0334018	0.6049028
EARTH	2087-10-20 16:47	> 1 mo	0.0423219	0.0400025	0.1858731
EARTH	2090-11-08 03:03	> 1 mo	0.1068166	0.0141497	0.7144686
EARTH	2094-01-29 10:36	> 1 mo	0.1400990	0.1213033	0.4921732
EARTH	2097-02-13 06:37	> 1 mo	0.1399040	0.1233307	0.6776942

Download as:

Stationary Points

Ecc. an. ast.	Ecc. an. Earth	Distance in au	Classification
318.44696838	287.09887829	0.03874668	MINIMUM
43.21218271	37.71122784	0.12550124	MINIMUM
10.33286545	355.24224896	0.14843945	SADDLE
181.27609348	161.68635413	0.72041046	SADDLE
359.56308359	160.69729987	1.93031283	SADDLE
178.88517299	339.91454393	2.69471845	MAXIMUM

Download:

MOID Plots

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