Asteroids

2023RQ9 help

Last update: 2026-07-30 14:25 UTC

Orbital Properties

Epoch

61200.0

MJD

Orbit type

Amor

Perihelion (q)

1.027

Aphelion (Q)

4.146

Eccentricity (e)

0.603

Inclination (i)

1.9

deg

Orbit period (P)

1519.5

Earth MOID

0.02704

U parameter

8.0

Next Earth close approach

Date

2048-09-14

Nominal distance (from Earth center)

0.03484

5212280

Maximum Brightness

19.4

mag

Risk

Object is not in risk list

Physical Properties

Absolute Magnitude (H)

25.7

mag

Diameter

20 - 40*

Taxonomic type

Rotation period (T)

Discovery Information

Discovery Date

2023-09-13

Observatory

MAPS, San Pedro de Atacama

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

2.586682

1-sigma variation

0.006179

Unit

Eccentricity (e)

Value

0.602859

1-sigma variation

0.000938

Unit

Inclination (i)

Value

1.8703

1-sigma variation

0.0025

Unit

Long. of Ascending Node (Ω)

Value

150.4563

1-sigma variation

0.0081

Unit

Arg. of Perihelion (ω)

Value

209.5432

1-sigma variation

0.0121

Unit

Mean Anomaly (M)

Value

234.83237

1-sigma variation

0.84067

Unit

Perihelion distance

Value

1.027279

1-sigma variation

Unit

Aphelion distance

Value

4.146086

1-sigma variation

Unit

Asc. Node-Earth Sep.

Value

2.474726

1-sigma variation

Unit

Desc. Node-Earth Sep.

Value

0.068451

1-sigma variation

Unit

MOID

Value

0.027038

1-sigma variation

Unit

Orbit Period

Value

1519.5432

1-sigma variation

Unit

U parameter

Value

8.0

1-sigma variation

Unit

Covariance Matrix

	a	e	i	Ω	ω	M
a	3.81792E-5	5.79813E-6	1.44056E-5	-1.24243E-5	-3.59038E-6	-5.19444E-3
e	5.79813E-6	8.80547E-7	2.18575E-6	-1.90542E-6	-5.16361E-7	-7.88863E-4
i	1.44056E-5	2.18575E-6	6.12380E-6	1.79638E-6	-1.13511E-5	-1.95927E-3
Ω	-1.24243E-5	-1.90542E-6	1.79638E-6	6.51720E-5	-9.29915E-5	1.69675E-3
ω	-3.59038E-6	-5.16361E-7	-1.13511E-5	-9.29915E-5	1.45889E-4	4.78582E-4
M	-5.19444E-3	-7.88863E-4	-1.95927E-3	1.69675E-3	4.78582E-4	7.06728E-1

Date of computation: 2026-07-30 14:25 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

25.657

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

20 - 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

[-]

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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

1083

Unit

Source

[1]

Normalized RMS of residuals

Value

0.788207

Unit

Source

[1]

Astrometry Summary

First Observation
Last Observation
Total Optical Observations (Discarded)

Optical

Value

Unit

Source

First Observation

Value

2023-09-13.14291

Unit

Source

[2]

Last Observation

Value

2023-09-14.907357

Unit

Source

[2]

Total Optical Observations (Discarded)

Value

21 (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

Filters

Initial Date: *

Final Date: *

Normalised Only accepted

Max residual (arcsec):

* - these fields are required

Plot

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 2023RQ9 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	1969-10-02 18:37	> 1 mo	0.0430759	0.0117228	0.1441748
EARTH	1994-08-15 09:43	> 1 mo	0.0901769	0.0026117	0.5711685
EARTH	2023-09-16 23:09	1.1	0.0268842	0.0267730	0.0000371
EARTH	2048-09-14 02:58	> 1 mo	0.0348419	0.0281327	0.0822660
EARTH	2077-10-29 20:04	> 1 mo	0.1195756	0.0266776	6.1056313
EARTH	2106-10-24 23:42	> 1 mo	0.1165619	0.0236046	2.4327739

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Stationary Points

Ecc. an. ast.	Ecc. an. Earth	Distance in au	Classification
357.52777172	251.50180515	0.02703754	MINIMUM
358.83837021	74.13699191	2.02291191	SADDLE
179.71747976	75.21733340	3.15040869	SADDLE
179.69736704	255.20543988	5.15023269	MAXIMUM

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MOID Plots

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