Asteroids

2025UJ2 help

Last update: 2025-10-27 07:51 UTC

Orbital Properties

Epoch

61000.0

MJD

Orbit type

Apollo

Perihelion (q)

0.923

Aphelion (Q)

1.788

Eccentricity (e)

0.319

Inclination (i)

23.1

deg

Orbit period (P)

576.6

Earth MOID

0.04184

U parameter

8.0

Next Earth close approach

Date

2055-10-25

Nominal distance (from Earth center)

0.07567

11320362

Maximum Brightness

20.7

mag

Risk

Object is not in risk list

Physical Properties

Absolute Magnitude (H)

24.1

mag

Diameter

40 - 90*

Taxonomic type

Rotation period (T)

Discovery Information

Discovery Date

2025-10-19

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

61000.0000

1-sigma variation

Unit

MJD

Semimajor Axis

Value

1.355749

1-sigma variation

0.001200

Unit

Eccentricity (e)

Value

0.318978

1-sigma variation

0.000588

Unit

Inclination (i)

Value

23.1332

1-sigma variation

0.0278

Unit

Long. of Ascending Node (Ω)

Value

31.4202

1-sigma variation

0.0020

Unit

Arg. of Perihelion (ω)

Value

58.1785

1-sigma variation

0.0351

Unit

Mean Anomaly (M)

Value

346.92046

1-sigma variation

0.04122

Unit

Perihelion distance

Value

0.923294

1-sigma variation

Unit

Aphelion distance

Value

1.788203

1-sigma variation

Unit

Asc. Node-Earth Sep.

Value

0.047853

1-sigma variation

Unit

Desc. Node-Earth Sep.

Value

0.457461

1-sigma variation

Unit

MOID

Value

0.041836

1-sigma variation

Unit

Orbit Period

Value

576.5902

1-sigma variation

Unit

U parameter

Value

8.0

1-sigma variation

Unit

Covariance Matrix

	a	e	i	Ω	ω	M
a	1.43955E-6	7.05438E-7	3.32983E-5	2.41030E-6	-4.20980E-5	4.94584E-5
e	7.05438E-7	3.45695E-7	1.63176E-5	1.18115E-6	-2.06290E-5	2.42364E-5
i	3.32983E-5	1.63176E-5	7.70234E-4	5.57532E-5	-9.73728E-4	1.14401E-3
Ω	2.41030E-6	1.18115E-6	5.57532E-5	4.03570E-6	-7.04842E-5	8.28094E-5
ω	-4.20980E-5	-2.06290E-5	-9.73728E-4	-7.04842E-5	1.23132E-3	-1.44643E-3
M	4.94584E-5	2.42364E-5	1.14401E-3	8.28094E-5	-1.44643E-3	1.69927E-3

Date of computation: 2025-10-27 07:51 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

24.06

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

40 - 90*

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

0.700001

Unit

Source

[1]

Astrometry Summary

First Observation
Last Observation
Total Optical Observations (Discarded)

Optical

Value

Unit

Source

First Observation

Value

2025-10-19.505065

Unit

Source

[2]

Last Observation

Value

2025-10-26.271963

Unit

Source

[2]

Total Optical Observations (Discarded)

Value

27 (4)

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 2025UJ2 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	1976-11-03 10:00	> 1 w	0.1709573	0.0316078	0.2321099
EARTH	1995-10-24 07:45	> 1 w	0.0939732	0.0394506	0.2157585
EARTH	2025-10-26 12:10	< 1 min	0.0485078	0.0483178	0.0000633
EARTH	2055-10-25 09:58	> 1 w	0.0756719	0.0412474	0.1978969
EARTH	2085-10-19 14:09	> 1 w	0.1910416	0.0347910	0.2200015
EARTH	2096-10-31 13:09	> 1 w	0.1044106	0.0399404	0.1673184

Download as:

Stationary Points

Ecc. an. ast.	Ecc. an. Earth	Distance in au	Classification
318.73581698	293.63388478	0.04183597	MINIMUM
70.23727149	78.39958013	0.31787771	MINIMUM
25.59630000	23.22959830	0.39095577	SADDLE
192.39390582	175.39639312	0.90726122	SADDLE
5.38668447	174.05437888	1.91087410	SADDLE
174.73553128	342.03211108	2.73728475	MAXIMUM

Download:

MOID Plots

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