Asteroids

2025JA1 help

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

Orbital Properties

Epoch

61000.0

MJD

Orbit type

Apollo

Perihelion (q)

0.914

Aphelion (Q)

3.211

Eccentricity (e)

0.557

Inclination (i)

10.3

deg

Orbit period (P)

1081.7

Earth MOID

0.00758

U parameter

7.8

Next Earth close approach

Date

2096-07-24

Nominal distance (from Earth center)

0.17621

26359910

Maximum Brightness

25.6

mag

Risk

Object is not in risk list

Physical Properties

Absolute Magnitude (H)

25.6

mag

Diameter

21 - 50*

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

61000.0000

1-sigma variation

Unit

MJD

Semimajor Axis

Value

2.062280

1-sigma variation

0.002595

Unit

Eccentricity (e)

Value

0.556954

1-sigma variation

0.000592

Unit

Inclination (i)

Value

10.3445

1-sigma variation

0.0075

Unit

Long. of Ascending Node (Ω)

Value

52.1247

1-sigma variation

0.0002

Unit

Arg. of Perihelion (ω)

Value

220.2489

1-sigma variation

0.0011

Unit

Mean Anomaly (M)

Value

53.73092

1-sigma variation

0.09903

Unit

Perihelion distance

Value

0.913685

1-sigma variation

Unit

Aphelion distance

Value

3.210874

1-sigma variation

Unit

Asc. Node-Earth Sep.

Value

1.484635

1-sigma variation

Unit

Desc. Node-Earth Sep.

Value

-0.013695

1-sigma variation

Unit

MOID

Value

0.007577

1-sigma variation

Unit

Orbit Period

Value

1081.7321

1-sigma variation

Unit

U parameter

Value

7.8

1-sigma variation

Unit

Covariance Matrix

	a	e	i	Ω	ω	M
a	6.73218E-6	1.53664E-6	1.95437E-5	-4.70986E-7	2.79583E-6	-2.56957E-4
e	1.53664E-6	3.50743E-7	4.46090E-6	-1.07502E-7	6.38172E-7	-5.86514E-5
i	1.95437E-5	4.46090E-6	5.67358E-5	-1.36731E-6	8.11670E-6	-7.45953E-4
Ω	-4.70986E-7	-1.07502E-7	-1.36731E-6	3.31675E-8	-1.94758E-7	1.79766E-5
ω	2.79583E-6	6.38172E-7	8.11670E-6	-1.94758E-7	1.16682E-6	-1.06714E-4
M	-2.56957E-4	-5.86514E-5	-7.45953E-4	1.79766E-5	-1.06714E-4	9.80770E-3

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

25.559

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

21 - 50*

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

166

Unit

Source

[1]

Normalized RMS of residuals

Value

0.567333

Unit

Source

[1]

Astrometry Summary

First Observation
Last Observation
Total Optical Observations (Discarded)

Optical

Value

Unit

Source

First Observation

Value

2025-05-02.269439

Unit

Source

[2]

Last Observation

Value

2025-05-11.194925

Unit

Source

[2]

Total Optical Observations (Discarded)

Value

48 (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 2025JA1 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	1963-07-31 05:14	> 1 mo	0.1776631	0.1757792	0.0677965
EARTH	1966-05-24 15:47	> 1 mo	0.0726135	0.0137896	0.5486311
EARTH	2022-07-20 00:40	> 1 w	0.1748144	0.1738375	0.0023595
EARTH	2025-05-12 04:20	< 1 s	0.0102243	0.0101972	0.0000091
EARTH	2096-07-24 02:43	> 1 mo	0.1762051	0.1758437	0.0308028
EARTH	2099-05-29 12:24	> 1 mo	0.0941539	0.0229008	0.5057593
EARTH	2102-05-02 07:33	> 1 mo	0.1059686	0.0096616	0.6584418

Download as:

Stationary Points

Ecc. an. ast.	Ecc. an. Earth	Distance in au	Classification
336.67962828	127.41459127	0.00661998	MINIMUM
0.94160925	351.51812130	1.89343272	SADDLE
180.67945196	350.32030831	2.22460430	SADDLE
179.74735531	169.82784576	4.20958024	MAXIMUM

Download:

MOID Plots

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