Asteroids

2025JJ help

Last update: 2025-09-10 00:30 UTC

Orbital Properties

Epoch

61000.0

MJD

Orbit type

Apollo

Perihelion (q)

0.545

Aphelion (Q)

1.750

Eccentricity (e)

0.525

Inclination (i)

23.0

deg

Orbit period (P)

449.0

Earth MOID

0.00089

U parameter

7.5

Next Earth close approach

Date

2041-04-29

Nominal distance (from Earth center)

0.08823

13198558

Maximum Brightness

23.6

mag

Risk

Object is not in risk list

Physical Properties

Absolute Magnitude (H)

26.2

mag

Diameter

15 - 30*

Taxonomic type

Rotation period (T)

Discovery Information

Discovery Date

2025-05-03

Observatory

ATLAS-MLO, Mauna Loa

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

1.147490

1-sigma variation

0.000373

Unit

Eccentricity (e)

Value

0.525460

1-sigma variation

0.000233

Unit

Inclination (i)

Value

22.9639

1-sigma variation

0.0126

Unit

Long. of Ascending Node (Ω)

Value

222.2343

1-sigma variation

0.0001

Unit

Arg. of Perihelion (ω)

Value

250.4524

1-sigma variation

0.0077

Unit

Mean Anomaly (M)

Value

209.69567

1-sigma variation

0.11492

Unit

Perihelion distance

Value

0.544530

1-sigma variation

Unit

Aphelion distance

Value

1.750451

1-sigma variation

Unit

Asc. Node-Earth Sep.

Value

-0.001608

1-sigma variation

Unit

Desc. Node-Earth Sep.

Value

-0.285317

1-sigma variation

Unit

MOID

Value

0.000894

1-sigma variation

Unit

Orbit Period

Value

448.9749

1-sigma variation

Unit

U parameter

Value

7.5

1-sigma variation

Unit

Covariance Matrix

	a	e	i	Ω	ω	M
a	1.39046E-7	8.68908E-8	4.69651E-6	5.02148E-8	2.88706E-6	-4.28507E-5
e	8.68908E-8	5.43031E-8	2.93515E-6	3.13694E-8	1.80371E-6	-2.67779E-5
i	4.69651E-6	2.93515E-6	1.58653E-4	1.69556E-6	9.74892E-5	-1.44736E-3
Ω	5.02148E-8	3.13694E-8	1.69556E-6	1.81956E-8	1.04364E-6	-1.54748E-5
ω	2.88706E-6	1.80371E-6	9.74892E-5	1.04364E-6	5.99883E-5	-8.89713E-4
M	-4.28507E-5	-2.67779E-5	-1.44736E-3	-1.54748E-5	-8.89713E-4	1.32056E-2

Date of computation: 2025-09-10 00:30 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

26.186

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

[-]

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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

168

Unit

Source

[1]

Normalized RMS of residuals

Value

0.599717

Unit

Source

[1]

Astrometry Summary

First Observation
Last Observation
Total Optical Observations (Discarded)

Optical

Value

Unit

Source

First Observation

Value

2025-05-03.375429

Unit

Source

[2]

Last Observation

Value

2025-05-08.244468

Unit

Source

[2]

Total Optical Observations (Discarded)

Value

62 (2)

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 2025JJ 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	1952-05-02 18:59	306.8	0.0122693	0.0026256	0.0047878
EARTH	1978-04-29 16:45	> 1 d	0.0868487	0.0009042	0.0598126
EARTH	1999-05-08 17:43	> 1 d	0.1331787	0.0013281	0.0707625
EARTH	2002-10-14 04:02	> 1 d	0.1942046	0.1940419	0.0025951
VENUS	2004-01-26 05:46	> 1 d	0.0352428	0.0253132	0.0485199
EARTH	2004-04-26 11:33	> 1 d	0.1775996	0.0025352	0.0585523
VENUS	2005-04-21 17:00	> 1 d	0.0291796	0.0252067	0.0309699
EARTH	2025-05-02 14:11	< 1 s	0.0044137	0.0044068	0.0000023
EARTH	2041-04-29 12:26	> 1 d	0.0882269	0.0009873	0.0455667
EARTH	2057-04-29 04:31	> 1 d	0.0985894	0.0018331	0.0715742
EARTH	2073-05-01 11:30	> 1 d	0.0364019	0.0015425	0.0601715
EARTH	2089-05-03 15:48	> 1 d	0.0185789	0.0018037	0.0983712
EARTH	2110-04-29 09:39	> 1 w	0.1331409	0.0041027	0.7954336

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Stationary Points

Ecc. an. ast.	Ecc. an. Earth	Distance in au	Classification
76.60793703	119.19328629	0.00003541	MINIMUM
297.08282638	277.98376221	0.19784020	MINIMUM
6.80029751	21.32228343	0.52375680	SADDLE
185.39802501	192.25101581	0.89105500	SADDLE
3.20317545	194.57964097	1.53450800	SADDLE
178.28548854	7.97281106	2.69043041	MAXIMUM

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MOID Plots

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