Asteroids

2025SW6 help

Last update: 2026-03-17 23:26 UTC

Orbital Properties

Epoch

61200.0

MJD

Orbit type

Apollo

Perihelion (q)

0.840

Aphelion (Q)

1.260

Eccentricity (e)

0.200

Inclination (i)

2.4

deg

Orbit period (P)

393.0

Earth MOID

0.00187

U parameter

6.3

Next Earth close approach

Date

2027-03-09

Nominal distance (from Earth center)

0.07427

11110034

Maximum Brightness

26.5

mag

Risk

Object is not in risk list

Physical Properties

Absolute Magnitude (H)

28.5

mag

Diameter

5 - 12*

Taxonomic type

Rotation period (T)

Discovery Information

Discovery Date

2025-09-23

Observatory

JPL SynTrack Robotic Telescope, Auberry

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

61200.0000

1-sigma variation

Unit

MJD

Semimajor Axis

Value

1.050059

1-sigma variation

0.000049

Unit

Eccentricity (e)

Value

0.199759

1-sigma variation

0.000084

Unit

Inclination (i)

Value

2.4309

1-sigma variation

0.0015

Unit

Long. of Ascending Node (Ω)

Value

176.3528

1-sigma variation

0.0014

Unit

Arg. of Perihelion (ω)

Value

276.3135

1-sigma variation

0.0039

Unit

Mean Anomaly (M)

Value

167.51038

1-sigma variation

0.00468

Unit

Perihelion distance

Value

0.840301

1-sigma variation

Unit

Aphelion distance

Value

1.259818

1-sigma variation

Unit

Asc. Node-Earth Sep.

Value

-0.008127

1-sigma variation

Unit

Desc. Node-Earth Sep.

Value

0.025556

1-sigma variation

Unit

MOID

Value

0.001873

1-sigma variation

Unit

Orbit Period

Value

393.0241

1-sigma variation

Unit

U parameter

Value

6.3

1-sigma variation

Unit

Covariance Matrix

	a	e	i	Ω	ω	M
a	2.44469E-9	4.17190E-9	7.24099E-8	6.79096E-8	-1.91145E-7	-2.31287E-7
e	4.17190E-9	7.12062E-9	1.23569E-7	1.15905E-7	-3.26078E-7	-3.94685E-7
i	7.24099E-8	1.23569E-7	2.14488E-6	2.01154E-6	-5.66157E-6	-6.85066E-6
Ω	6.79096E-8	1.15905E-7	2.01154E-6	1.88691E-6	-5.30838E-6	-6.42465E-6
ω	-1.91145E-7	-3.26078E-7	-5.66157E-6	-5.30838E-6	1.49565E-5	1.80848E-5
M	-2.31287E-7	-3.94685E-7	-6.85066E-6	-6.42465E-6	1.80848E-5	2.18819E-5

Date of computation: 2026-03-17 23:26 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

28.46

Unit

mag

Source

[1]

Slope Parameter (G)

Value

0.15**

Unit

Source

[1]

Albedo
Diameter

Size and albedo

Value

Unit

Source

Albedo

Value

0.05 - 0.25

Unit

Source

[2]

Diameter

Value

5 - 12*

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

225

Unit

Source

[1]

Normalized RMS of residuals

Value

0.801993

Unit

Source

[1]

Astrometry Summary

First Observation
Last Observation
Total Optical Observations (Discarded)

Optical

Value

Unit

Source

First Observation

Value

2025-09-16.467391

Unit

Source

[2]

Last Observation

Value

2025-09-25.215221

Unit

Source

[2]

Total Optical Observations (Discarded)

Value

20 (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

Note: Ephemerides requests are limited to a maximum of 1000 points and a final date not exceeding 2040/12/31 00:00.

Close Approaches for 2025SW6 from 1950 to 2126

Body	Date in UTC	Time uncert. in min	Nominal distance in au	Min. possible distance in au	Distance uncert. in au
EARTH	1960-09-16 20:54	828.8	0.1778133	0.1304702	0.0157819
EARTH	1962-01-09 12:58	> 1 w	0.1402294	0.1313733	0.0029633
EARTH	1962-04-27 21:36	> 1 w	0.1815754	0.1575524	0.0080308
EARTH	1974-09-02 00:56	> 1 w	0.1480675	0.1214286	0.0089237
EARTH	1974-11-15 02:06	> 1 w	0.1252259	0.1104099	0.0049496
EARTH	1976-03-23 20:44	700.4	0.1278734	0.0944460	0.0111425
EARTH	1987-10-02 12:25	236.4	0.0543329	0.0520934	0.0007465
EARTH	1989-03-19 08:05	172.0	0.0483237	0.0410563	0.0024225
EARTH	2000-08-14 05:39	> 1 d	0.1889538	0.1827910	0.0020562
EARTH	2000-12-08 03:26	> 1 d	0.1414830	0.1400439	0.0004798
EARTH	2012-09-20 15:10	316.6	0.1181129	0.1037319	0.0047943
EARTH	2014-02-12 17:10	> 1 d	0.1035065	0.0940664	0.0031522
EARTH	2025-09-27 01:59	< 1 min	0.0062945	0.0062857	0.0000029
EARTH	2027-03-09 06:01	125.9	0.0742660	0.0734175	0.0002828
EARTH	2039-09-19 13:56	324.1	0.1446900	0.1276482	0.0056810
EARTH	2041-01-05 08:14	> 1 d	0.1456957	0.1435568	0.0007142
EARTH	2041-05-06 08:18	> 1 d	0.1918469	0.1844345	0.0024718
EARTH	2054-09-06 18:04	> 1 d	0.1369256	0.1215652	0.0051312
EARTH	2054-11-09 14:47	> 1 d	0.1202583	0.1108172	0.0031496
EARTH	2056-03-22 16:20	475.3	0.0577585	0.0398722	0.0059639
EARTH	2068-09-13 00:32	> 1 w	0.1297227	0.0961914	0.0112226
EARTH	2068-11-06 01:06	> 1 w	0.1154027	0.0951582	0.0067625
EARTH	2070-03-23 12:26	1083.5	0.0682104	0.0241019	0.0147166
EARTH	2082-12-28 14:16	> 1 d	0.1467842	0.1463594	0.0001417
EARTH	2095-09-25 14:34	> 1 d	0.0435744	0.0062291	0.0180035
EARTH	2097-02-15 10:23	> 1 w	0.1054226	0.0865961	0.0063401
EARTH	2109-09-21 02:28	> 1 d	0.1359995	0.0051571	0.0642729
EARTH	2111-01-10 22:14	> 1 mo	0.1436115	0.1081781	0.0121249
EARTH	2111-05-05 14:26	> 1 mo	0.1863650	0.0891471	0.0328023
EARTH	2124-08-24 19:34	> 1 mo	0.1642268	0.0360135	0.0520797
EARTH	2124-11-25 05:18	> 1 mo	0.1354117	0.0596531	0.0255272
EARTH	2126-03-26 19:55	> 1 d	0.0987706	0.0032832	0.0863477

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Stationary Points

Ecc. an. ast.	Ecc. an. Earth	Distance in au	Classification
75.16857228	77.01994371	0.00221524	MINIMUM
282.69327019	263.55241607	0.00569963	MINIMUM
358.71421660	350.01600101	0.14847917	SADDLE
179.15496472	170.56835068	0.24673560	SADDLE
358.98787293	170.35138747	1.85786121	SADDLE
179.41443145	350.78773751	2.24328567	MAXIMUM

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MOID Plots

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