Asteroids

2025SS7 help

Last update: 2025-09-26 13:16 UTC

Orbital Properties

Epoch

61000.0

MJD

Orbit type

Aten

Perihelion (q)

0.722

Aphelion (Q)

1.099

Eccentricity (e)

0.207

Inclination (i)

2.2

deg

Orbit period (P)

317.2

Earth MOID

0.00040

U parameter

4.6

Next Earth close approach

Date

2031-06-18

Nominal distance (from Earth center)

0.16336

24438126

Maximum Brightness

29.7

mag

Risk

Object is in risk list

Physical Properties

Absolute Magnitude (H)

30.2

mag

Diameter

2.4 - 5*

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

0.910281

1-sigma variation

0.000003

Unit

Eccentricity (e)

Value

0.206996

1-sigma variation

0.000018

Unit

Inclination (i)

Value

2.2491

1-sigma variation

0.0004

Unit

Long. of Ascending Node (Ω)

Value

2.6204

1-sigma variation

0.0001

Unit

Arg. of Perihelion (ω)

Value

129.9638

1-sigma variation

0.0026

Unit

Mean Anomaly (M)

Value

314.09635

1-sigma variation

0.00469

Unit

Perihelion distance

Value

0.721856

1-sigma variation

Unit

Aphelion distance

Value

1.098706

1-sigma variation

Unit

Asc. Node-Earth Sep.

Value

0.001750

1-sigma variation

Unit

Desc. Node-Earth Sep.

Value

-0.228938

1-sigma variation

Unit

MOID

Value

0.000402

1-sigma variation

Unit

Orbit Period

Value

317.2210

1-sigma variation

Unit

U parameter

Value

4.6

1-sigma variation

Unit

Covariance Matrix

	a	e	i	Ω	ω	M
a	7.65955E-12	4.42929E-11	1.04400E-9	3.33717E-10	-6.83231E-9	1.20734E-8
e	4.42929E-11	3.18596E-10	7.28150E-9	2.33382E-9	-4.54630E-8	8.34608E-8
i	1.04400E-9	7.28150E-9	1.67176E-7	5.35056E-8	-1.04982E-6	1.91741E-6
Ω	3.33717E-10	2.33382E-9	5.35056E-8	1.71729E-8	-3.36205E-7	6.14276E-7
ω	-6.83231E-9	-4.54630E-8	-1.04982E-6	-3.36205E-7	6.66193E-6	-1.20700E-5
M	1.20734E-8	8.34608E-8	1.91741E-6	6.14276E-7	-1.20700E-5	2.20110E-5

Date of computation: 2025-09-26 13:16 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

30.225

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

2.4 - 5*

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

0.733193

Unit

Source

[1]

Astrometry Summary

First Observation
Last Observation
Total Optical Observations (Discarded)

Optical

Value

Unit

Source

First Observation

Value

2025-09-24.338553

Unit

Source

[2]

Last Observation

Value

2025-09-26.119357

Unit

Source

[2]

Total Optical Observations (Discarded)

Value

35 (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 2025SS7 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
VENUS	1952-07-10 03:40	295.1	0.0466701	0.0436002	0.0010457
EARTH	1956-05-29 18:21	45.5	0.1124263	0.1104961	0.0006442
EARTH	1957-09-27 06:46	14.9	0.0465898	0.0422977	0.0014308
EARTH	1966-05-29 00:43	85.0	0.0404620	0.0404230	0.0000523
EARTH	1967-09-24 11:12	74.6	0.1643846	0.1586338	0.0019170
EARTH	1976-06-28 23:40	> 1 d	0.0976725	0.0944491	0.0010806
EARTH	1986-08-26 21:01	1165.0	0.0936521	0.0918478	0.0006020
EARTH	1995-05-31 15:48	46.2	0.1154482	0.1121275	0.0011093
EARTH	1996-09-26 08:10	60.4	0.0708028	0.0662313	0.0015238
EARTH	2005-04-27 06:06	> 1 d	0.1384675	0.1343528	0.0013783
EARTH	2005-07-06 11:59	> 1 d	0.1032140	0.1016184	0.0005336
EARTH	2015-09-25 00:16	52.9	0.0267608	0.0258263	0.0003115
EARTH	2024-05-31 11:17	1.3	0.1566870	0.1566190	0.0000226
EARTH	2025-09-26 17:36	< 1 s	0.0019169	0.0019161	0.0000003
EARTH	2031-06-18 06:45	3.0	0.1633588	0.1630494	0.0001031
EARTH	2038-07-28 23:54	243.7	0.0891842	0.0891378	0.0000155
EARTH	2038-11-24 11:22	444.1	0.1893211	0.1887935	0.0001759
VENUS	2039-11-13 07:38	106.3	0.0193799	0.0184885	0.0002975
EARTH	2051-09-07 11:40	> 1 d	0.0630326	0.0587276	0.0014366
EARTH	2057-06-18 14:58	71.4	0.1625188	0.1571270	0.0017992
VENUS	2063-03-30 02:56	269.1	0.0235791	0.0210250	0.0008532
EARTH	2064-09-23 19:47	104.8	0.0090383	0.0062546	0.0009279
EARTH	2077-06-14 03:48	324.3	0.0623471	0.0395043	0.0406089
EARTH	2084-07-12 05:13	> 1 w	0.0779707	0.0603816	0.0066684
EARTH	2091-09-09 02:08	> 1 w	0.0599038	0.0071171	0.0183539
EARTH	2098-09-26 18:43	81.8	0.0384387	0.0018794	0.0446057
EARTH	2111-06-16 12:49	> 1 w	0.0405687	0.0395433	0.0346200
EARTH	2118-05-03 06:44	> 1 mo	0.1617528	0.0738118	0.3070584
EARTH	2118-08-05 23:54	> 1 mo	0.0866979	0.0859452	0.0107979
EARTH	2118-11-15 19:42	> 1 mo	0.1709213	0.0218335	0.2878654
EARTH	2125-09-24 15:48	> 1 mo	0.0156354	0.0023955	0.4571657

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Stationary Points

Ecc. an. ast.	Ecc. an. Earth	Distance in au	Classification
240.48727886	262.84990753	0.00040161	MINIMUM
124.00134308	164.37921972	0.03973274	MINIMUM
179.74075737	211.56648224	0.08901767	SADDLE
2.80984057	34.00551348	0.26553335	SADDLE
3.65801608	215.00960425	1.73698963	SADDLE
182.43751630	33.76765442	2.08469242	MAXIMUM

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MOID Plots

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

Level lines of the squared distance function

2025SS7

Date in UTC	MJD	σ	Distance ± Width in RE	Stretching in RE	IP	Impact energy	PS
2071-09-24.945	77743.945	2.949	1.50 ± 0.009	3.84E3	5.29E-6	7.95E-4	-7.90
2077-09-24.103	79935.103	2.916	0.43 ± 0.010	9.43E5	2.93E-8	7.94E-4	-10.21
2093-09-23.510	85778.510	3.997	1.25 ± 0.008	5.73E4	1.07E-8	7.92E-4	-10.76
2104-09-25.252	89797.252	2.467	1.14 ± 0.001	8.43E5	1.00E-7	7.91E-4	-9.86
2109-09-23.783	91621.783	-1.155	1.02 ± 0.197	2.03E6	4.79E-7	7.83E-4	-9.21
2109-09-24.513	91622.513	2.828	1.53 ± 0.015	5.24E5	6.15E-8	7.90E-4	-10.09
2116-09-25.547	94180.547	-3.029	1.20 ± 0.007	3.74E5	4.73E-8	7.94E-4	-10.24
2120-09-23.144	95639.144	4.657	0.97 ± 0.012	2.32E5	1.55E-10	7.89E-4	-12.75
2121-09-23.333	96004.333	-1.103	2.48 ± 0.153	2.02E7	1.89E-8	7.78E-4	-10.67
2124-09-25.910	97102.910	2.588	1.44 ± 0.020	2.78E5	2.06E-7	7.91E-4	-9.64
2124-09-25.935	97102.935	2.597	1.35 ± 0.052	2.65E5	2.19E-7	7.91E-4	-9.61


Based on 35 optical observations (of which 1 are rejected as outliers) from 2025/09/24.339 to 2025/09/26.119.
Coordinates are given on the Target Plane.
Unit is one Earth radius, but impact cross section has radius between 2.49 and 2.49 Earth radii.
Coordinates for LOV = EQU scaled= 1 second= F.
Aegis software version= 5.0, Date of computation=20250926 143016.220 UTC.

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