Asteroids

2025PJ1 help

Last update: 2025-08-16 13:22 UTC

Orbital Properties

Epoch

61000.0

MJD

Orbit type

Amor

Perihelion (q)

1.031

Aphelion (Q)

4.366

Eccentricity (e)

0.618

Inclination (i)

16.1

deg

Orbit period (P)

1619.3

Earth MOID

0.02648

U parameter

9.0

Next Earth close approach

Date

2025-09-22

Nominal distance (from Earth center)

0.03068

4590102

Maximum Brightness

15.8

mag

Risk

Object is in risk list

Physical Properties

Absolute Magnitude (H)

22.1

mag

Diameter

100 - 230*

Taxonomic type

Rotation period (T)

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

2.698674

1-sigma variation

0.064130

Unit

Eccentricity (e)

Value

0.617952

1-sigma variation

0.008779

Unit

Inclination (i)

Value

16.0731

1-sigma variation

0.1375

Unit

Long. of Ascending Node (Ω)

Value

177.0637

1-sigma variation

0.4840

Unit

Arg. of Perihelion (ω)

Value

182.1909

1-sigma variation

0.4397

Unit

Mean Anomaly (M)

Value

13.14536

1-sigma variation

0.48880

Unit

Perihelion distance

Value

1.031024

1-sigma variation

Unit

Aphelion distance

Value

4.366324

1-sigma variation

Unit

Asc. Node-Earth Sep.

Value

3.364860

1-sigma variation

Unit

Desc. Node-Earth Sep.

Value

0.026481

1-sigma variation

Unit

MOID

Value

0.026476

1-sigma variation

Unit

Orbit Period

Value

1619.2881

1-sigma variation

Unit

U parameter

Value

9.0

1-sigma variation

Unit

Covariance Matrix

	a	e	i	Ω	ω	M
a	4.11266E-3	5.62402E-4	8.81665E-3	1.55820E-2	-1.47539E-2	-3.12621E-2
e	5.62402E-4	7.70671E-5	1.20654E-3	1.96380E-3	-1.86809E-3	-4.26073E-3
i	8.81665E-3	1.20654E-3	1.89059E-2	3.24922E-2	-3.08122E-2	-6.69410E-2
Ω	1.55820E-2	1.96380E-3	3.24922E-2	2.34281E-1	-2.12740E-1	-1.33494E-1
ω	-1.47539E-2	-1.86809E-3	-3.08122E-2	-2.12740E-1	1.93301E-1	1.25618E-1
M	-3.12621E-2	-4.26073E-3	-6.69410E-2	-1.33494E-1	1.25618E-1	2.38930E-1

Date of computation: 2025-08-16 13:22 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

22.102

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

100 - 230*

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

0.309449

Unit

Source

[1]

Astrometry Summary

First Observation
Last Observation
Total Optical Observations (Discarded)

Optical

Value

Unit

Source

First Observation

Value

2025-08-02.275231

Unit

Source

[2]

Last Observation

Value

2025-08-06.15485

Unit

Source

[2]

Total Optical Observations (Discarded)

Value

13 (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 2025PJ1 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	2008-09-09 08:58	> 1 mo	0.0858976	0.0181469	1.8186363
EARTH	2025-09-21 22:45	313.8	0.0300978	0.0279057	0.0007309
EARTH	2042-09-14 16:13	> 1 mo	0.0465152	0.0212356	1.5983244
EARTH	2059-09-24 15:10	> 1 mo	0.0478978	0.0301152	0.2784181

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Stationary Points

Ecc. an. ast.	Ecc. an. Earth	Distance in au	Classification
358.86086581	256.58583414	0.02597554	MINIMUM
358.82508073	76.50830816	2.02740414	SADDLE
179.77936617	77.53112759	3.22839706	SADDLE
179.67081783	257.47789323	5.22971094	MAXIMUM

Download:

MOID Plots

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

Level lines of the squared distance function

2025PJ1

Date in UTC	MJD	σ	σ_imp	Distance ± Width in RE	Stretching in RE	IP	Impact energy	PS	TS
2093-09-19.527	85774.527	0.766	0.358	1.34 ± 5.235	3.04E5	4.80E-9	1.13E2	-6.99	0
2105-09-20.074	90157.074	-1.485	0.355	0.92 ± 60.943	7.79E6	3.40E-10	8.36E1	-8.32	0


Based on 13 optical observations (of which 0 are rejected as outliers) from 2025/08/02.275 to 2025/08/06.155.
Coordinates are given on the Target Plane.
Unit is one Earth radius, but impact cross section has radius between 1.35 and 1.35 Earth radii.
Coordinates for LOV = EQU scaled= 1 second= F.
Aegis software version= 5.0, Date of computation=20250806 044841.572 UTC.

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Download Impactor Table as: