Asteroids

2025SG4 help

Last update: 2025-09-25 13:26 UTC

Orbital Properties

Epoch

61000.0

MJD

Orbit type

Amor

Perihelion (q)

1.046

Aphelion (Q)

1.702

Eccentricity (e)

0.239

Inclination (i)

18.5

deg

Orbit period (P)

588.4

Earth MOID

0.04230

U parameter

8.1

Next Earth close approach

Date

2054-09-23

Nominal distance (from Earth center)

0.04304

6439243

Maximum Brightness

18.5

mag

Risk

Object is not in risk list

Physical Properties

Absolute Magnitude (H)

24.7

mag

Diameter

30 - 70*

Taxonomic type

Rotation period (T)

Discovery Information

Discovery Date

2025-09-20

Observatory

Palomar Mountain--ZTF

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

1.374245

1-sigma variation

0.001361

Unit

Eccentricity (e)

Value

0.238853

1-sigma variation

0.000697

Unit

Inclination (i)

Value

18.4954

1-sigma variation

0.0308

Unit

Long. of Ascending Node (Ω)

Value

181.0099

1-sigma variation

0.0022

Unit

Arg. of Perihelion (ω)

Value

178.9009

1-sigma variation

0.0080

Unit

Mean Anomaly (M)

Value

36.79666

1-sigma variation

0.05022

Unit

Perihelion distance

Value

1.046003

1-sigma variation

Unit

Aphelion distance

Value

1.702488

1-sigma variation

Unit

Asc. Node-Earth Sep.

Value

0.704921

1-sigma variation

Unit

Desc. Node-Earth Sep.

Value

0.042382

1-sigma variation

Unit

MOID

Value

0.042300

1-sigma variation

Unit

Orbit Period

Value

588.4301

1-sigma variation

Unit

U parameter

Value

8.1

1-sigma variation

Unit

Covariance Matrix

	a	e	i	Ω	ω	M
a	1.85249E-6	9.48775E-7	4.18585E-5	2.94455E-6	-1.04761E-5	-6.83325E-5
e	9.48775E-7	4.85926E-7	2.14380E-5	1.50807E-6	-5.36693E-6	-3.49963E-5
i	4.18585E-5	2.14380E-5	9.46050E-4	6.65469E-5	-2.35722E-4	-1.54462E-3
Ω	2.94455E-6	1.50807E-6	6.65469E-5	4.68111E-6	-1.65970E-5	-1.08648E-4
ω	-1.04761E-5	-5.36693E-6	-2.35722E-4	-1.65970E-5	6.41628E-5	3.83492E-4
M	-6.83325E-5	-3.49963E-5	-1.54462E-3	-1.08648E-4	3.83492E-4	2.52232E-3

Date of computation: 2025-09-25 13:26 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

24.73

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

30 - 70*

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

0.616088

Unit

Source

[1]

Astrometry Summary

First Observation
Last Observation
Total Optical Observations (Discarded)

Optical

Value

Unit

Source

First Observation

Value

2025-09-20.371374

Unit

Source

[2]

Last Observation

Value

2025-09-24.50591

Unit

Source

[2]

Total Optical Observations (Discarded)

Value

15 (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 2025SG4 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	1975-09-27 03:42	> 1 w	0.0703829	0.0402614	0.2299946
EARTH	1996-09-13 06:25	> 1 w	0.1854448	0.0231198	0.2254299
EARTH	2025-09-22 14:13	< 1 min	0.0475640	0.0473152	0.0000829
EARTH	2054-09-27 04:50	> 1 w	0.0733060	0.0407790	0.1941828
EARTH	2075-09-17 16:29	> 1 w	0.1276925	0.0338626	0.2141176
EARTH	2104-09-27 23:54	61.8	0.0765465	0.0751897	0.0004570
EARTH	2125-09-22 11:37	> 1 w	0.0632319	0.0420167	0.1281042

Download as:

Stationary Points

Ecc. an. ast.	Ecc. an. Earth	Distance in au	Classification
0.53257749	260.23801641	0.04231825	MINIMUM
174.92313419	74.32138546	0.70668794	SADDLE
355.03817230	73.55427253	2.04250880	SADDLE
178.18922060	256.74059001	2.70752230	MAXIMUM

Download:

MOID Plots

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