Asteroids

2025SJ29 help

Last update: 2025-10-06 13:00 UTC

Orbital Properties

Epoch

61000.0

MJD

Orbit type

Apollo

Perihelion (q)

0.947

Aphelion (Q)

2.431

Eccentricity (e)

0.439

Inclination (i)

11.6

deg

Orbit period (P)

801.8

Earth MOID

0.01527

U parameter

8.3

Next Earth close approach

Date

2036-09-23

Nominal distance (from Earth center)

0.17381

26002189

Maximum Brightness

25.4

mag

Risk

Object is not in risk list

Physical Properties

Absolute Magnitude (H)

26.5

mag

Diameter

13 - 30*

Taxonomic type

Rotation period (T)

Discovery Information

Discovery Date

2025-09-29

Observatory

Pan-STARRS 2, Haleakala

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

1.689061

1-sigma variation

0.003376

Unit

Eccentricity (e)

Value

0.439241

1-sigma variation

0.001153

Unit

Inclination (i)

Value

11.6453

1-sigma variation

0.0223

Unit

Long. of Ascending Node (Ω)

Value

13.6449

1-sigma variation

0.0015

Unit

Arg. of Perihelion (ω)

Value

40.2215

1-sigma variation

0.0104

Unit

Mean Anomaly (M)

Value

5.67768

1-sigma variation

0.00704

Unit

Perihelion distance

Value

0.947156

1-sigma variation

Unit

Aphelion distance

Value

2.430966

1-sigma variation

Unit

Asc. Node-Earth Sep.

Value

0.020990

1-sigma variation

Unit

Desc. Node-Earth Sep.

Value

1.049742

1-sigma variation

Unit

MOID

Value

0.015271

1-sigma variation

Unit

Orbit Period

Value

801.8009

1-sigma variation

Unit

U parameter

Value

8.3

1-sigma variation

Unit

Covariance Matrix

	a	e	i	Ω	ω	M
a	1.13999E-5	3.89404E-6	7.53957E-5	5.02381E-6	-3.52562E-5	-2.37735E-5
e	3.89404E-6	1.33015E-6	2.57541E-5	1.71605E-6	-1.20427E-5	-8.12080E-6
i	7.53957E-5	2.57541E-5	4.98648E-4	3.32257E-5	-2.33159E-4	-1.57236E-4
Ω	5.02381E-6	1.71605E-6	3.32257E-5	2.21409E-6	-1.55405E-5	-1.04757E-5
ω	-3.52562E-5	-1.20427E-5	-2.33159E-4	-1.55405E-5	1.09187E-4	7.34795E-5
M	-2.37735E-5	-8.12080E-6	-1.57236E-4	-1.04757E-5	7.34795E-5	4.95908E-5

Date of computation: 2025-10-06 13:00 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

26.478

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

13 - 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

Unit

Source

[1]

Normalized RMS of residuals

Value

0.916055

Unit

Source

[1]

Astrometry Summary

First Observation
Last Observation
Total Optical Observations (Discarded)

Optical

Value

Unit

Source

First Observation

Value

2025-09-29.466345

Unit

Source

[2]

Last Observation

Value

2025-10-06.185616

Unit

Source

[2]

Total Optical Observations (Discarded)

Value

23 (1)

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 2025SJ29 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	1950-12-01 04:53	> 1 w	0.1798147	0.1384685	0.0594447
EARTH	2014-10-02 07:49	> 1 w	0.0747943	0.0106241	0.1970685
EARTH	2025-10-08 01:47	< 1 min	0.0216334	0.0214903	0.0000477
EARTH	2036-09-23 22:15	> 1 w	0.1738139	0.0009146	0.2037723
EARTH	2082-12-11 07:55	> 1 mo	0.1941028	0.1641033	0.3066062
EARTH	2093-10-29 11:37	> 1 mo	0.1042739	0.0170822	0.5530832
EARTH	2104-10-11 05:07	> 1 mo	0.0178329	0.0176398	0.0720683
EARTH	2115-10-01 13:43	> 1 mo	0.1027380	0.0104335	8.9650062

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Stationary Points

Ecc. an. ast.	Ecc. an. Earth	Distance in au	Classification
336.18693097	276.14719178	0.01527072	MINIMUM
181.08314620	132.34455792	1.43351430	SADDLE
359.62784727	132.17642656	1.95539962	SADDLE
178.69546401	310.85977604	3.41437882	MAXIMUM

Download:

MOID Plots

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