Asteroids

2025UJ5 help

Last update: 2025-10-29 13:00 UTC

Orbital Properties

Epoch

61000.0

MJD

Orbit type

Aten

Perihelion (q)

0.743

Aphelion (Q)

1.007

Eccentricity (e)

0.151

Inclination (i)

3.8

deg

Orbit period (P)

298.9

Earth MOID

0.01207

U parameter

6.3

Next Earth close approach

Date

2034-10-09

Nominal distance (from Earth center)

0.02103

3145572

Maximum Brightness

22.3

mag

Risk

Object is not in risk list

Physical Properties

Absolute Magnitude (H)

mag

Diameter

7 - 15*

Taxonomic type

Rotation period (T)

Discovery Information

Discovery Date

2025-10-23

Observatory

JPL SynTrack Robotic Telescope, Auberry

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

0.874891

1-sigma variation

0.000034

Unit

Eccentricity (e)

Value

0.151310

1-sigma variation

0.000049

Unit

Inclination (i)

Value

3.8325

1-sigma variation

0.0014

Unit

Long. of Ascending Node (Ω)

Value

31.1281

1-sigma variation

0.0002

Unit

Arg. of Perihelion (ω)

Value

176.0180

1-sigma variation

0.0026

Unit

Mean Anomaly (M)

Value

218.46638

1-sigma variation

0.00143

Unit

Perihelion distance

Value

0.742511

1-sigma variation

Unit

Aphelion distance

Value

1.007270

1-sigma variation

Unit

Asc. Node-Earth Sep.

Value

0.012113

1-sigma variation

Unit

Desc. Node-Earth Sep.

Value

-0.263703

1-sigma variation

Unit

MOID

Value

0.012075

1-sigma variation

Unit

Orbit Period

Value

298.9021

1-sigma variation

Unit

U parameter

Value

6.3

1-sigma variation

Unit

Covariance Matrix

	a	e	i	Ω	ω	M
a	1.17040E-9	-1.66538E-9	-4.84485E-8	-7.76318E-9	-8.91127E-8	4.36659E-8
e	-1.66538E-9	2.36971E-9	6.89367E-8	1.10465E-8	1.26732E-7	-6.20419E-8
i	-4.84485E-8	6.89367E-8	2.00593E-6	3.21379E-7	3.69454E-6	-1.81527E-6
Ω	-7.76318E-9	1.10465E-8	3.21379E-7	5.15209E-8	5.90689E-7	-2.89147E-7
ω	-8.91127E-8	1.26732E-7	3.69454E-6	5.90689E-7	7.01532E-6	-3.63370E-6
M	4.36659E-8	-6.20419E-8	-1.81527E-6	-2.89147E-7	-3.63370E-6	2.04366E-6

Date of computation: 2025-10-29 13:00 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

28.001

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

7 - 15*

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

0.783239

Unit

Source

[1]

Astrometry Summary

First Observation
Last Observation
Total Optical Observations (Discarded)

Optical

Value

Unit

Source

First Observation

Value

2025-10-23.317022

Unit

Source

[2]

Last Observation

Value

2025-10-28.21506

Unit

Source

[2]

Total Optical Observations (Discarded)

Value

56 (5)

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 2025UJ5 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	1960-10-05 14:08	> 1 w	0.0372987	0.0216785	0.0942225
EARTH	1965-11-26 06:36	1416.8	0.1701684	0.0364409	0.1038795
VENUS	1971-02-13 01:22	> 1 d	0.0425920	0.0385225	0.0132266
EARTH	1979-11-06 21:44	> 1 d	0.0179224	0.0154084	0.0036074
EARTH	1993-11-08 19:57	> 1 d	0.0204083	0.0178636	0.0010521
EARTH	2002-09-27 03:00	17.1	0.0953488	0.0933186	0.0006779
EARTH	2003-02-06 04:38	1260.4	0.1865671	0.1856558	0.0003043
EARTH	2016-11-22 16:14	463.5	0.0578534	0.0501778	0.0026196
EARTH	2025-10-25 13:10	< 1 min	0.0121291	0.0121175	0.0000039
EARTH	2034-10-09 07:48	> 1 d	0.0210269	0.0171519	0.0015586
EARTH	2048-07-28 00:49	> 1 w	0.1739391	0.1670497	0.0022984
EARTH	2048-11-22 06:28	152.9	0.0756985	0.0649960	0.0036162
EARTH	2057-10-02 23:53	359.4	0.0353792	0.0326154	0.0009313
EARTH	2071-10-30 14:44	> 1 d	0.0137428	0.0116280	0.0008854
EARTH	2080-10-31 21:29	> 1 d	0.0152322	0.0112022	0.0022974
EARTH	2093-09-25 14:07	853.1	0.0841655	0.0744501	0.0032467
EARTH	2094-01-25 04:59	> 1 d	0.1774193	0.1720029	0.0018114
EARTH	2102-11-19 01:28	534.0	0.0489616	0.0486102	0.0001214
VENUS	2103-12-25 01:25	> 1 d	0.0337734	0.0336547	0.0003424
EARTH	2115-11-11 10:06	> 1 w	0.0268524	0.0176320	0.0209947

Download as:

Stationary Points

Ecc. an. ast.	Ecc. an. Earth	Distance in au	Classification
183.29437113	289.59734716	0.01207490	MINIMUM
8.66809903	114.69949060	0.26418377	SADDLE
8.00614097	293.94125042	1.73733381	SADDLE
185.99228461	111.90748288	2.01360213	MAXIMUM

Download:

MOID Plots

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