Asteroids

2025HJ help

Last update: 2025-04-25 13:01 UTC

Orbital Properties

Epoch

60800.0

MJD

Orbit type

Amor

Perihelion (q)

1.088

Aphelion (Q)

2.011

Eccentricity (e)

0.298

Inclination (i)

39.2

deg

Orbit period (P)

704.4

Earth MOID

0.10002

U parameter

8.5

Next Earth close approach

Date

2052-04-11

Nominal distance (from Earth center)

0.12931

19344409

Maximum Brightness

20.6

mag

Risk

Object is not in risk list

Object is not in priority list

Physical Properties

Absolute Magnitude (H)

23.3

mag

Diameter

60 - 130*

Taxonomic type

Rotation period (T)

Discovery Information

Discovery Date

2025-04-18

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

1.549304

1-sigma variation

0.003489

Unit

Eccentricity (e)

Value

0.297795

1-sigma variation

0.001465

Unit

Inclination (i)

Value

39.2449

1-sigma variation

0.0567

Unit

Long. of Ascending Node (Ω)

Value

202.7796

1-sigma variation

0.0055

Unit

Arg. of Perihelion (ω)

Value

20.4220

1-sigma variation

0.0429

Unit

Mean Anomaly (M)

Value

2.54571

1-sigma variation

0.01716

Unit

Perihelion distance

Value

1.087928

1-sigma variation

Unit

Aphelion distance

Value

2.010680

1-sigma variation

Unit

Asc. Node-Earth Sep.

Value

0.101140

1-sigma variation

Unit

Desc. Node-Earth Sep.

Value

0.961761

1-sigma variation

Unit

MOID

Value

0.100018

1-sigma variation

Unit

Orbit Period

Value

704.3742

1-sigma variation

Unit

U parameter

Value

8.5

1-sigma variation

Unit

Covariance Matrix

	a	e	i	Ω	ω	M
a	1.21722E-5	5.11139E-6	1.97767E-4	1.91618E-5	-1.49544E-4	5.98657E-5
e	5.11139E-6	2.14639E-6	8.30470E-5	8.04649E-6	-6.27970E-5	2.51389E-5
i	1.97767E-4	8.30470E-5	3.21323E-3	3.11333E-4	-2.42967E-3	9.72641E-4
Ω	1.91618E-5	8.04649E-6	3.11333E-4	3.01656E-5	-2.35411E-4	9.42389E-5
ω	-1.49544E-4	-6.27970E-5	-2.42967E-3	-2.35411E-4	1.83760E-3	-7.35667E-4
M	5.98657E-5	2.51389E-5	9.72641E-4	9.42389E-5	-7.35667E-4	2.94523E-4

Date of computation: 2025-04-25 13:01 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

23.3

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 - 130*

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

0.557145

Unit

Source

[1]

Astrometry Summary

First Observation
Last Observation
Total Optical Observations (Discarded)

Optical

Value

Unit

Source

First Observation

Value

2025-04-10.363504

Unit

Source

[2]

Last Observation

Value

2025-04-25.459215

Unit

Source

[2]

Total Optical Observations (Discarded)

Value

25 (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 2025HJ 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	1971-04-12 04:28	> 1 mo	0.1213890	0.1000313	0.6851277
EARTH	1998-04-12 13:12	> 1 w	0.1124587	0.1002527	0.2496449
EARTH	2025-04-12 04:16	< 1 min	0.1154434	0.1148553	0.0001960
EARTH	2052-04-11 06:18	> 1 w	0.1293094	0.0991960	0.3539910
EARTH	2079-04-10 15:44	> 1 mo	0.1637973	0.0978939	0.8668506

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Stationary Points

Ecc. an. ast.	Ecc. an. Earth	Distance in au	Classification
345.83052318	100.67037741	0.10001792	MINIMUM
98.66995954	244.18084650	0.84140712	MINIMUM
77.03626441	222.05457189	0.84701383	SADDLE
223.68834845	326.93519673	1.14753736	SADDLE
22.70864504	323.67255797	2.04150884	SADDLE
174.34910656	113.71584726	3.00419081	MAXIMUM

Download:

MOID Plots

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