Asteroids

2025UD help

Last update: 2025-10-17 11:45 UTC

Orbital Properties

Epoch

61000.0

MJD

Orbit type

Apollo

Perihelion (q)

1.011

Aphelion (Q)

1.457

Eccentricity (e)

0.181

Inclination (i)

26.8

deg

Orbit period (P)

500.5

Earth MOID

0.01409

U parameter

7.3

Next Earth close approach

Date

2062-10-17

Nominal distance (from Earth center)

0.02619

3917743

Maximum Brightness

18.9

mag

Risk

Object is not in risk list

Physical Properties

Absolute Magnitude (H)

24.8

mag

Diameter

30 - 70*

Taxonomic type

Rotation period (T)

Discovery Information

Discovery Date

2025-10-16

Observatory

ATLAS-HKO, 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

1.233703

1-sigma variation

0.000326

Unit

Eccentricity (e)

Value

0.180772

1-sigma variation

0.000211

Unit

Inclination (i)

Value

26.7773

1-sigma variation

0.0123

Unit

Long. of Ascending Node (Ω)

Value

24.4750

1-sigma variation

0.0001

Unit

Arg. of Perihelion (ω)

Value

1.2796

1-sigma variation

0.0059

Unit

Mean Anomaly (M)

Value

23.76679

1-sigma variation

0.00953

Unit

Perihelion distance

Value

1.010684

1-sigma variation

Unit

Aphelion distance

Value

1.456722

1-sigma variation

Unit

Asc. Node-Earth Sep.

Value

0.014093

1-sigma variation

Unit

Desc. Node-Earth Sep.

Value

0.452132

1-sigma variation

Unit

MOID

Value

0.014086

1-sigma variation

Unit

Orbit Period

Value

500.5117

1-sigma variation

Unit

U parameter

Value

7.3

1-sigma variation

Unit

Covariance Matrix

	a	e	i	Ω	ω	M
a	1.06008E-7	6.85512E-8	3.99745E-6	3.38102E-8	-3.20854E-7	-2.82161E-6
e	6.85512E-8	4.43293E-8	2.58518E-6	2.18590E-8	-2.05283E-7	-1.82611E-6
i	3.99745E-6	2.58518E-6	1.51246E-4	1.26792E-6	-8.46513E-6	-1.08874E-4
Ω	3.38102E-8	2.18590E-8	1.26792E-6	1.09408E-8	-1.69057E-7	-8.54494E-7
ω	-3.20854E-7	-2.05283E-7	-8.46513E-6	-1.69057E-7	3.48184E-5	-1.45122E-5
M	-2.82161E-6	-1.82611E-6	-1.08874E-4	-8.54494E-7	-1.45122E-5	9.08025E-5

Date of computation: 2025-10-17 11:45 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

24.768

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

30 - 70*

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

0.9

Unit

Source

[1]

Unobserved

Value

0.7

Unit

Source

[1]

Normalized RMS of residuals

Value

0.511234

Unit

Source

[1]

Astrometry Summary

First Observation
Last Observation
Total Optical Observations (Discarded)

Optical

Value

Unit

Source

First Observation

Value

2025-10-16.487556

Unit

Source

[2]

Last Observation

Value

2025-10-17.35675

Unit

Source

[2]

Total Optical Observations (Discarded)

Value

46 (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 2025UD 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	1951-10-11 00:05	> 1 w	0.1579795	0.0067335	0.1761461
EARTH	1977-10-19 13:26	> 1 d	0.0423973	0.0138940	0.0798345
EARTH	1988-10-11 10:21	> 1 d	0.1352816	0.0086635	0.0792605
EARTH	2014-10-26 03:07	> 1 d	0.1813019	0.0998857	0.0271480
EARTH	2025-10-17 17:56	< 1 min	0.0146962	0.0146745	0.0000072
EARTH	2062-10-17 06:18	> 1 d	0.0261885	0.0140502	0.0668188
EARTH	2088-10-16 12:19	> 1 w	0.0324345	0.0137465	0.2084310
EARTH	2103-10-27 11:50	> 1 w	0.1787961	0.0053638	0.1924919

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Stationary Points

Ecc. an. ast.	Ecc. an. Earth	Distance in au	Classification
358.89369326	284.07622652	0.01408590	MINIMUM
180.07082515	103.70236241	0.45198927	MINIMUM
262.19619683	174.49162323	0.55895886	SADDLE
96.77903148	33.01666530	0.56020621	SADDLE
348.34928511	92.78832550	2.01420483	SADDLE
177.22917774	281.58823514	2.45357929	MAXIMUM

Download:

MOID Plots

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