Asteroids

2025SS3 help

Last update: 2025-10-07 13:00 UTC

Orbital Properties

Epoch

61000.0

MJD

Orbit type

Apollo

Perihelion (q)

0.925

Aphelion (Q)

4.037

Eccentricity (e)

0.627

Inclination (i)

2.9

deg

Orbit period (P)

1427.3

Earth MOID

0.00675

U parameter

8.1

Next Earth close approach

Date

2088-12-27

Nominal distance (from Earth center)

0.14006

20952471

Maximum Brightness

21.8

mag

Risk

Object is not in risk list

Physical Properties

Absolute Magnitude (H)

23.7

mag

Diameter

50 - 110*

Taxonomic type

Rotation period (T)

Discovery Information

Discovery Date

2025-09-20

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

2.480861

1-sigma variation

0.006011

Unit

Eccentricity (e)

Value

0.627185

1-sigma variation

0.000920

Unit

Inclination (i)

Value

2.8914

1-sigma variation

0.0029

Unit

Long. of Ascending Node (Ω)

Value

193.4842

1-sigma variation

0.0038

Unit

Arg. of Perihelion (ω)

Value

223.7136

1-sigma variation

0.0036

Unit

Mean Anomaly (M)

Value

3.76972

1-sigma variation

0.01057

Unit

Perihelion distance

Value

0.924902

1-sigma variation

Unit

Aphelion distance

Value

4.036819

1-sigma variation

Unit

Asc. Node-Earth Sep.

Value

1.752685

1-sigma variation

Unit

Desc. Node-Earth Sep.

Value

0.035526

1-sigma variation

Unit

MOID

Value

0.006748

1-sigma variation

Unit

Orbit Period

Value

1427.2565

1-sigma variation

Unit

U parameter

Value

8.1

1-sigma variation

Unit

Covariance Matrix

	a	e	i	Ω	ω	M
a	3.61299E-5	5.53214E-6	1.75635E-5	2.29627E-5	-2.15785E-5	-6.35558E-5
e	5.53214E-6	8.47070E-7	2.68928E-6	3.51599E-6	-3.30400E-6	-9.73154E-6
i	1.75635E-5	2.68928E-6	8.53847E-6	1.11609E-5	-1.04869E-5	-3.08959E-5
Ω	2.29627E-5	3.51599E-6	1.11609E-5	1.46008E-5	-1.37219E-5	-4.03933E-5
ω	-2.15785E-5	-3.30400E-6	-1.04869E-5	-1.37219E-5	1.29230E-5	3.79545E-5
M	-6.35558E-5	-9.73154E-6	-3.08959E-5	-4.03933E-5	3.79545E-5	1.11801E-4

Date of computation: 2025-10-07 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

23.73

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

50 - 110*

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

Unit

Source

[1]

Normalized RMS of residuals

Value

0.480334

Unit

Source

[1]

Astrometry Summary

First Observation
Last Observation
Total Optical Observations (Discarded)

Optical

Value

Unit

Source

First Observation

Value

2025-09-20.407542

Unit

Source

[2]

Last Observation

Value

2025-10-05.494226

Unit

Source

[2]

Total Optical Observations (Discarded)

Value

47 (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 2025SS3 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	1986-10-06 04:27	> 1 mo	0.0331724	0.0028551	0.6425660
EARTH	2022-01-06 17:50	> 1 d	0.1464436	0.0500422	0.0832540
EARTH	2025-10-04 21:42	< 1 min	0.0655750	0.0653321	0.0000810
EARTH	2088-12-27 11:15	> 1 mo	0.1400586	0.0467880	0.8734774
EARTH	2092-12-18 05:33	> 1 mo	0.0907691	0.0434241	0.5567911
EARTH	2096-12-19 22:43	> 1 mo	0.0986540	0.0440191	0.2671674
EARTH	2100-12-22 02:47	> 1 w	0.1071418	0.0449771	0.1221647

Download as:

Stationary Points

Ecc. an. ast.	Ecc. an. Earth	Distance in au	Classification
342.23983281	280.70261045	0.00674813	MINIMUM
15.28503595	347.41288200	0.04798175	MINIMUM
0.52745492	317.67549339	0.07164587	SADDLE
359.08941279	134.72977939	1.93770514	SADDLE
179.81432194	135.59726628	3.02445959	SADDLE
179.77138655	315.58091789	5.02472908	MAXIMUM

Download:

MOID Plots

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