Asteroids

2023RG9 help

Last update: 2026-06-04 23:11 UTC

Orbital Properties

Epoch

61200.0

MJD

Orbit type

Amor

Perihelion (q)

1.026

Aphelion (Q)

1.422

Eccentricity (e)

0.162

Inclination (i)

9.7

deg

Orbit period (P)

494.9

Earth MOID

0.02102

U parameter

7.8

Next Earth close approach

Date

2046-10-03

Nominal distance (from Earth center)

0.18791

28110693

Maximum Brightness

24.9

mag

Risk

Object is not in risk list

Physical Properties

Absolute Magnitude (H)

25.7

mag

Diameter

19 - 40*

Taxonomic type

Rotation period (T)

Discovery Information

Discovery Date

2023-09-14

Observatory

MARGO, Nauchnyi

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

1.224396

1-sigma variation

0.000626

Unit

Eccentricity (e)

Value

0.161716

1-sigma variation

0.000394

Unit

Inclination (i)

Value

9.6962

1-sigma variation

0.0171

Unit

Long. of Ascending Node (Ω)

Value

352.0533

1-sigma variation

0.0036

Unit

Arg. of Perihelion (ω)

Value

6.4565

1-sigma variation

0.0147

Unit

Mean Anomaly (M)

Value

2.43720

1-sigma variation

0.54331

Unit

Perihelion distance

Value

1.026392

1-sigma variation

Unit

Aphelion distance

Value

1.422400

1-sigma variation

Unit

Asc. Node-Earth Sep.

Value

0.021025

1-sigma variation

Unit

Desc. Node-Earth Sep.

Value

0.427060

1-sigma variation

Unit

MOID

Value

0.021019

1-sigma variation

Unit

Orbit Period

Value

494.8590

1-sigma variation

Unit

U parameter

Value

7.8

1-sigma variation

Unit

Covariance Matrix

	a	e	i	Ω	ω	M
a	3.92339E-7	2.46959E-7	1.07343E-5	2.26912E-6	-9.19710E-6	-3.40311E-4
e	2.46959E-7	1.55449E-7	6.75672E-6	1.42830E-6	-5.78917E-6	-2.14210E-4
i	1.07343E-5	6.75672E-6	2.93698E-4	6.20852E-5	-2.51605E-4	-9.31085E-3
Ω	2.26912E-6	1.42830E-6	6.20852E-5	1.31243E-5	-5.31857E-5	-1.96822E-3
ω	-9.19710E-6	-5.78917E-6	-2.51605E-4	-5.31857E-5	2.15684E-4	7.97742E-3
M	-3.40311E-4	-2.14210E-4	-9.31085E-3	-1.96822E-3	7.97742E-3	2.95183E-1

Date of computation: 2026-06-04 23:11 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

25.749

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

19 - 40*

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

989

Unit

Source

[1]

Normalized RMS of residuals

Value

0.605542

Unit

Source

[1]

Astrometry Summary

First Observation
Last Observation
Total Optical Observations (Discarded)

Optical

Value

Unit

Source

First Observation

Value

2023-09-10.526936

Unit

Source

[2]

Last Observation

Value

2023-09-21.40645

Unit

Source

[2]

Total Optical Observations (Discarded)

Value

22 (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

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 2023RG9 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	1951-10-03 20:02	> 1 w	0.1880664	0.0136751	0.1556928
EARTH	1970-09-19 02:17	> 1 d	0.0406889	0.0193337	0.0289007
EARTH	1989-10-01 05:33	> 1 d	0.1616223	0.0079575	0.0943671
EARTH	2004-08-30 00:50	> 1 d	0.1422982	0.0057083	0.0846719
EARTH	2023-09-11 23:52	< 1 min	0.0381786	0.0379619	0.0000722
EARTH	2046-10-03 22:32	> 1 d	0.1879084	0.0147207	0.0987908
EARTH	2065-09-17 05:19	> 1 w	0.0289901	0.0207092	0.0676470
EARTH	2084-10-01 11:51	> 1 w	0.1636328	0.0098331	0.2480332
EARTH	2099-09-01 15:02	> 1 w	0.1271592	0.0012719	0.2148845
EARTH	2118-09-14 18:08	> 1 d	0.0254635	0.0210513	0.0229870

Download as:

Stationary Points

Ecc. an. ast.	Ecc. an. Earth	Distance in au	Classification
354.49818772	251.66308747	0.02094253	MINIMUM
177.84482816	74.65064416	0.42636346	SADDLE
354.50956546	71.66632392	2.02238499	SADDLE
175.76018179	252.90368221	2.42757487	MAXIMUM

Download:

MOID Plots

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