Asteroids

2025JU help

Last update: 2025-07-29 08:01 UTC

Orbital Properties

Epoch

60800.0

MJD

Orbit type

Apollo

Perihelion (q)

0.795

Aphelion (Q)

2.738

Eccentricity (e)

0.550

Inclination (i)

10.0

deg

Orbit period (P)

857.6

Earth MOID

0.00435

U parameter

8.2

Next Earth close approach

Date

2046-09-29

Nominal distance (from Earth center)

0.03466

5185115

Maximum Brightness

19.5

mag

Risk

Object is in risk list

Physical Properties

Absolute Magnitude (H)

23.2

mag

Diameter

60 - 140*

Taxonomic type

Rotation period (T)

Discovery Information

Discovery Date

2025-05-02

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

60800.0000

1-sigma variation

Unit

MJD

Semimajor Axis

Value

1.766539

1-sigma variation

0.002613

Unit

Eccentricity (e)

Value

0.549704

1-sigma variation

0.000734

Unit

Inclination (i)

Value

10.0167

1-sigma variation

0.0129

Unit

Long. of Ascending Node (Ω)

Value

189.6443

1-sigma variation

0.0141

Unit

Arg. of Perihelion (ω)

Value

113.3731

1-sigma variation

0.0198

Unit

Mean Anomaly (M)

Value

337.00750

1-sigma variation

0.06057

Unit

Perihelion distance

Value

0.795465

1-sigma variation

Unit

Aphelion distance

Value

2.737613

1-sigma variation

Unit

Asc. Node-Earth Sep.

Value

0.577585

1-sigma variation

Unit

Desc. Node-Earth Sep.

Value

0.011586

1-sigma variation

Unit

MOID

Value

0.004353

1-sigma variation

Unit

Orbit Period

Value

857.5968

1-sigma variation

Unit

U parameter

Value

8.2

1-sigma variation

Unit

Covariance Matrix

	a	e	i	Ω	ω	M
a	6.82827E-6	1.91811E-6	3.35955E-5	3.68693E-5	-5.17158E-5	1.58267E-4
e	1.91811E-6	5.38812E-7	9.43721E-6	1.03568E-5	-1.45273E-5	4.44583E-5
i	3.35955E-5	9.43721E-6	1.65292E-4	1.81400E-4	-2.54447E-4	7.78680E-4
Ω	3.68693E-5	1.03568E-5	1.81400E-4	1.99089E-4	-2.79257E-4	8.54561E-4
ω	-5.17158E-5	-1.45273E-5	-2.54447E-4	-2.79257E-4	3.91709E-4	-1.19868E-3
M	1.58267E-4	4.44583E-5	7.78680E-4	8.54561E-4	-1.19868E-3	3.66833E-3

Date of computation: 2025-07-29 08:01 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

23.218

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

60 - 140*

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

[-]

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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

0.577938

Unit

Source

[1]

Astrometry Summary

First Observation
Last Observation
Total Optical Observations (Discarded)

Optical

Value

Unit

Source

First Observation

Value

2025-05-02.402653

Unit

Source

[2]

Last Observation

Value

2025-06-06.461439

Unit

Source

[2]

Total Optical Observations (Discarded)

Value

38 (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 2025JU 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	1978-05-28 19:22	> 1 mo	0.1894573	0.1169006	1.1060435
EARTH	1992-09-28 19:40	> 1 mo	0.0310811	0.0050902	0.4295348
EARTH	2025-05-10 11:31	< 1 min	0.1333591	0.1329107	0.0001495
EARTH	2046-09-29 02:20	> 1 w	0.0346604	0.0025270	0.3095817
EARTH	2053-10-12 21:47	> 1 w	0.1760533	0.0026481	0.2229859
EARTH	2086-05-12 03:44	> 1 mo	0.1340812	0.1298842	0.6391413
MARS	2093-03-13 11:52	> 1 mo	0.0461362	0.0432456	0.8678307
EARTH	2107-09-03 09:45	> 1 mo	0.1952728	0.0557140	3.1823755
EARTH	2114-10-01 05:46	> 1 mo	0.0298154	0.0029501	5.1079502
EARTH	2121-10-08 16:29	> 1 mo	0.0711981	0.0049166	8.6127335

Download as:

Stationary Points

Ecc. an. ast.	Ecc. an. Earth	Distance in au	Classification
38.10986741	267.03602010	0.00435332	MINIMUM
318.62003131	129.60840917	0.12546910	MINIMUM
355.98711460	193.86708039	0.26519926	SADDLE
179.28840956	20.59430307	1.77257460	SADDLE
358.90320822	19.43584552	1.77436560	SADDLE
180.07387346	201.01601654	3.74331198	MAXIMUM

Download:

MOID Plots

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

Level lines of the squared distance function

2025JU

Date in UTC	MJD	σ	Distance ± Width in RE	Stretching in RE	IP	Impact energy	PS
2074-10-02.350	78847.350	-1.343	0.87 ± 0.013	2.18E4	1.33E-5	3.02E1	-3.87
2074-10-02.352	78847.352	-1.469	0.79 ± 0.013	7.32E3	3.54E-5	3.02E1	-3.44
2076-10-01.887	79577.887	-4.441	0.56 ± 0.013	1.83E4	2.53E-9	2.94E1	-7.62
2079-10-02.559	80673.559	-0.993	0.39 ± 0.013	7.86E5	7.29E-7	3.03E1	-5.17
2079-10-02.562	80673.562	-0.994	0.76 ± 0.012	9.22E5	6.49E-7	3.04E1	-5.22
2103-10-03.355	89439.355	4.108	1.20 ± 0.014	3.13E5	1.66E-10	3.14E1	-8.96
2108-10-02.603	91265.603	1.615	0.90 ± 0.013	8.17E5	2.27E-7	3.07E1	-5.86


Based on 38 optical observations (of which 0 are rejected as outliers) from 2025/05/02.403 to 2025/06/06.461.
Coordinates are given on the Target Plane.
Unit is one Earth radius, but impact cross section has radius between 1.24 and 1.24 Earth radii.
Coordinates for LOV = EQU scaled= 1 second= F.
Aegis software version= 5.0, Date of computation=20250805 130500.123 UTC.

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