Asteroids

2025SU3 help

Last update: 2025-09-24 14:14 UTC

Orbital Properties

Epoch

61000.0

MJD

Orbit type

Apollo

Perihelion (q)

0.776

Aphelion (Q)

1.389

Eccentricity (e)

0.283

Inclination (i)

6.2

deg

Orbit period (P)

411.3

Earth MOID

0.00349

U parameter

7.9

Next Earth close approach

Date

2027-03-25

Nominal distance (from Earth center)

0.05132

7677004

Maximum Brightness

21.5

mag

Risk

Object is in risk list

Physical Properties

Absolute Magnitude (H)

24.9

mag

Diameter

28 - 60*

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

1.082308

1-sigma variation

0.000556

Unit

Eccentricity (e)

Value

0.283069

1-sigma variation

0.000664

Unit

Inclination (i)

Value

6.1926

1-sigma variation

0.0145

Unit

Long. of Ascending Node (Ω)

Value

189.0549

1-sigma variation

0.0069

Unit

Arg. of Perihelion (ω)

Value

267.2594

1-sigma variation

0.0249

Unit

Mean Anomaly (M)

Value

350.25560

1-sigma variation

0.05705

Unit

Perihelion distance

Value

0.775940

1-sigma variation

Unit

Aphelion distance

Value

1.388675

1-sigma variation

Unit

Asc. Node-Earth Sep.

Value

0.009413

1-sigma variation

Unit

Desc. Node-Earth Sep.

Value

-0.018985

1-sigma variation

Unit

MOID

Value

0.003490

1-sigma variation

Unit

Orbit Period

Value

411.2676

1-sigma variation

Unit

U parameter

Value

7.9

1-sigma variation

Unit

Covariance Matrix

	a	e	i	Ω	ω	M
a	3.09566E-7	3.69016E-7	8.03748E-6	3.84906E-6	-1.37188E-5	3.17391E-5
e	3.69016E-7	4.40570E-7	9.60086E-6	4.58839E-6	-1.62667E-5	3.78379E-5
i	8.03748E-6	9.60086E-6	2.09262E-4	9.99327E-5	-3.53683E-4	8.24166E-4
Ω	3.84906E-6	4.58839E-6	9.99327E-5	4.78693E-5	-1.70566E-4	3.94635E-4
ω	-1.37188E-5	-1.62667E-5	-3.53683E-4	-1.70566E-4	6.18876E-4	-1.40611E-3
M	3.17391E-5	3.78379E-5	8.24166E-4	3.94635E-4	-1.40611E-3	3.25415E-3

Date of computation: 2025-09-24 14:14 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

24.899

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

28 - 60*

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

0.509285

Unit

Source

[1]

Astrometry Summary

First Observation
Last Observation
Total Optical Observations (Discarded)

Optical

Value

Unit

Source

First Observation

Value

2025-09-20.568619

Unit

Source

[2]

Last Observation

Value

2025-09-24.437021

Unit

Source

[2]

Total Optical Observations (Discarded)

Value

24 (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 2025SU3 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	1954-10-24 21:31	> 1 w	0.1503194	0.0431104	0.0446620
EARTH	1956-04-03 03:34	> 1 d	0.1369328	0.0027876	0.0534089
EARTH	1963-10-11 11:44	> 1 d	0.1192148	0.0193654	0.0361965
EARTH	1965-04-01 22:05	> 1 d	0.1071936	0.0146040	0.0309819
EARTH	1972-10-11 07:03	> 1 d	0.1206480	0.1045885	0.0053864
EARTH	1974-04-02 13:25	805.5	0.1159802	0.0733065	0.0142277
EARTH	1981-10-31 08:01	> 1 w	0.1613436	0.0755326	0.0316457
EARTH	1983-04-05 09:23	> 1 d	0.1713241	0.0164079	0.0516925
EARTH	2016-09-19 16:08	> 1 d	0.1701622	0.0481136	0.0408495
EARTH	2018-02-26 19:10	> 1 w	0.1580782	0.0727823	0.0294216
EARTH	2025-09-26 05:18	< 1 min	0.0470234	0.0466781	0.0001151
EARTH	2027-03-25 10:03	325.9	0.0513176	0.0386608	0.0042248
EARTH	2034-09-26 16:15	> 1 d	0.0395156	0.0076983	0.0373507
EARTH	2036-03-24 01:27	> 1 d	0.0671768	0.0000000	0.0289778
EARTH	2043-09-19 17:05	1328.1	0.1772566	0.1157101	0.0205315
EARTH	2045-02-07 20:57	> 1 w	0.1914994	0.1443129	0.0159855
EARTH	2071-10-06 00:34	> 1 w	0.0895290	0.0106493	0.2150749
EARTH	2073-03-31 08:13	> 1 w	0.0584184	0.0020577	0.2118696
EARTH	2080-09-30 01:19	> 1 d	0.0238772	0.0052174	0.0370180
EARTH	2082-03-29 05:06	1026.1	0.0229828	0.0023409	0.0317992
EARTH	2089-11-21 07:37	> 1 mo	0.1960117	0.0871434	0.0725057
EARTH	2106-09-24 02:43	> 1 w	0.1277959	0.0063217	0.5659800
EARTH	2108-03-20 19:23	> 1 mo	0.1059345	0.0017086	0.5973664
EARTH	2115-10-05 15:08	> 1 mo	0.0654886	0.0055866	0.6066919
EARTH	2117-04-02 14:41	> 1 w	0.0939873	0.0024217	0.5246838

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Stationary Points

Ecc. an. ast.	Ecc. an. Earth	Distance in au	Classification
74.54461926	85.05966230	0.00349049	MINIMUM
285.66717289	265.21148560	0.00723028	MINIMUM
0.12613045	355.26751801	0.22804402	SADDLE
180.07950858	174.98951186	0.39213742	SADDLE
359.65910209	174.65672674	1.79147447	SADDLE
179.73184674	354.72709612	2.36893723	MAXIMUM

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MOID Plots

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

Level lines of the squared distance function

2025SU3

Date in UTC	MJD	σ	σ_imp	Distance ± Width in RE	Stretching in RE	IP	Impact energy	PS	TS
2092-10-01.712	85421.712	1.079	0.598	1.43 ± 0.034	3.28E6	3.87E-9	1.75E0	-8.53	0
2093-03-29.507	85600.507	0.712	0.000	0.68 ± 0.333	2.11E5	4.24E-6	1.68E0	-5.50	0
2102-03-30.707	88887.707	0.352	0.000	0.80 ± 0.511	1.51E5	7.49E-6	1.67E0	-5.31	0
2104-03-30.182	89618.182	0.712	0.000	1.46 ± 0.338	5.28E7	7.56E-9	1.68E0	-8.32	0
2112-03-30.262	92540.262	0.739	0.000	1.14 ± 0.087	1.73E5	4.78E-6	1.68E0	-5.56	0
2121-03-30.149	95827.149	0.935	0.000	0.76 ± 1.108	3.52E7	1.52E-8	1.68E0	-8.10	0
2121-10-02.817	96013.817	0.290	0.000	0.11 ± 6.983	3.35E7	5.47E-9	1.67E0	-8.55	0
2122-03-30.582	96192.582	0.708	0.000	1.39 ± 0.374	2.43E6	1.91E-7	1.68E0	-7.00	0
2122-03-30.670	96192.670	0.741	0.000	1.64 ± 0.351	4.23E6	6.02E-8	1.68E0	-7.50	0
2125-10-02.805	97474.805	1.065	0.000	1.11 ± 0.024	2.39E7	2.34E-8	1.68E0	-7.93	n/a


Based on 24 optical observations (of which 0 are rejected as outliers) from 2025/09/20.569 to 2025/09/24.437.
Coordinates are given on the Target Plane.
Unit is one Earth radius, but impact cross section has radius between 1.64 and 1.64 Earth radii.
Coordinates for LOV = EQU scaled= 1 second= F.
Aegis software version= 5.0, Date of computation=20250924 163446.928 UTC.

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