Asteroids

2023SG help

Last update: 2025-09-10 00:30 UTC

Orbital Properties

Epoch

61000.0

MJD

Orbit type

Aten

Perihelion (q)

0.736

Aphelion (Q)

1.083

Eccentricity (e)

0.191

Inclination (i)

13.6

deg

Orbit period (P)

316.8

Earth MOID

0.02445

U parameter

6.3

Next Earth close approach

Date

2036-09-11

Nominal distance (from Earth center)

0.08573

12825272

Maximum Brightness

24.2

mag

Risk

Object is not in risk list

Physical Properties

Absolute Magnitude (H)

26.6

mag

Diameter

13 - 29*

Taxonomic type

Rotation period (T)

Discovery Information

Discovery Date

2023-09-16

Observatory

Pan-STARRS 1, 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

0.909396

1-sigma variation

0.000037

Unit

Eccentricity (e)

Value

0.190596

1-sigma variation

0.000258

Unit

Inclination (i)

Value

13.6175

1-sigma variation

0.0238

Unit

Long. of Ascending Node (Ω)

Value

173.8811

1-sigma variation

0.0011

Unit

Arg. of Perihelion (ω)

Value

36.4268

1-sigma variation

0.0243

Unit

Mean Anomaly (M)

Value

312.37148

1-sigma variation

0.01117

Unit

Perihelion distance

Value

0.736069

1-sigma variation

Unit

Aphelion distance

Value

1.082723

1-sigma variation

Unit

Asc. Node-Earth Sep.

Value

-0.235563

1-sigma variation

Unit

Desc. Node-Earth Sep.

Value

0.029337

1-sigma variation

Unit

MOID

Value

0.024448

1-sigma variation

Unit

Orbit Period

Value

316.7582

1-sigma variation

Unit

U parameter

Value

6.3

1-sigma variation

Unit

Covariance Matrix

	a	e	i	Ω	ω	M
a	1.39072E-9	-9.48527E-9	-8.49352E-7	3.91633E-8	-8.85274E-7	-8.75680E-8
e	-9.48527E-9	6.67967E-8	6.11523E-6	-2.81799E-7	6.27938E-6	9.71470E-8
i	-8.49352E-7	6.11523E-6	5.68493E-4	-2.61862E-5	5.77388E-4	-2.27913E-5
Ω	3.91633E-8	-2.81799E-7	-2.61862E-5	1.20623E-6	-2.66039E-5	1.01051E-6
ω	-8.85274E-7	6.27938E-6	5.77388E-4	-2.66039E-5	5.91444E-4	-1.92725E-6
M	-8.75680E-8	9.71470E-8	-2.27913E-5	1.01051E-6	-1.92725E-6	1.24764E-4

Date of computation: 2025-09-10 00:30 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

26.572

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

13 - 29*

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

739

Unit

Source

[1]

Normalized RMS of residuals

Value

0.750623

Unit

Source

[1]

Astrometry Summary

First Observation
Last Observation
Total Optical Observations (Discarded)

Optical

Value

Unit

Source

First Observation

Value

2023-09-16.32477

Unit

Source

[2]

Last Observation

Value

2023-09-18.00165

Unit

Source

[2]

Total Optical Observations (Discarded)

Value

27 (2)

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 2023SG 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	1957-09-12 10:18	408.9	0.1863649	0.1271217	0.0199499
EARTH	1964-09-16 23:12	> 1 d	0.0644445	0.0312468	0.0161660
VENUS	1974-10-15 02:16	520.4	0.0306904	0.0244081	0.0041356
EARTH	1977-09-12 01:11	73.2	0.1414454	0.1297440	0.0039141
EARTH	1984-09-29 12:11	653.5	0.1434295	0.1378099	0.0018981
VENUS	1989-07-20 06:48	651.3	0.0396757	0.0229794	0.0082623
EARTH	1997-09-17 04:10	1029.3	0.0618344	0.0423545	0.0070256
VENUS	2008-08-17 16:00	532.7	0.0350344	0.0243203	0.0052941
EARTH	2010-09-14 21:24	342.9	0.0344074	0.0280686	0.0026164
EARTH	2023-09-13 20:37	< 1 min	0.0251522	0.0250335	0.0000396
EARTH	2036-09-11 13:16	26.3	0.0857316	0.0740393	0.0039411
VENUS	2042-06-17 07:19	395.5	0.0261236	0.0246001	0.0016495
EARTH	2043-10-16 10:42	> 1 d	0.1989714	0.1871826	0.0040426
EARTH	2049-09-12 21:09	278.5	0.1811577	0.1330529	0.0161376
EARTH	2056-09-29 10:47	> 1 d	0.1446279	0.0933929	0.0189589
EARTH	2069-09-19 16:42	> 1 d	0.0860095	0.0393760	0.0183309
VENUS	2076-04-16 08:32	903.6	0.0442082	0.0225860	0.0113404
EARTH	2082-09-18 09:26	785.5	0.0718464	0.0582333	0.0047111
EARTH	2095-09-23 12:08	> 1 d	0.1088872	0.0452869	0.0282327
VENUS	2099-09-04 21:26	> 1 d	0.0342922	0.0222977	0.0356226
EARTH	2108-09-29 05:01	> 1 d	0.1392113	0.0704819	0.0286442
VENUS	2118-09-28 13:21	> 1 d	0.0414041	0.0215140	0.0250790
EARTH	2121-10-06 12:38	> 1 d	0.1681748	0.1419483	0.0090527

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Stationary Points

Ecc. an. ast.	Ecc. an. Earth	Distance in au	Classification
132.54649007	249.19686088	0.02519370	MINIMUM
296.17505236	34.11339686	0.20168122	MINIMUM
232.95575765	332.91628304	0.23574414	SADDLE
28.80353540	141.38046713	0.32196517	SADDLE
10.51121647	298.89451204	1.72399921	SADDLE
180.37890636	108.45417962	2.08244610	MAXIMUM

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MOID Plots

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