Asteroids

2023ES help

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

Orbital Properties

Epoch

61200.0

MJD

Orbit type

Apollo

Perihelion (q)

0.959

Aphelion (Q)

2.747

Eccentricity (e)

0.483

Inclination (i)

4.5

deg

Orbit period (P)

921.4

Earth MOID

0.00027

U parameter

6.2

Next Earth close approach

Date

2071-01-01

Nominal distance (from Earth center)

0.16246

24302957

Maximum Brightness

mag

Risk

Object is in risk list

Physical Properties

Absolute Magnitude (H)

26.4

mag

Diameter

14 - 30*

Taxonomic type

Rotation period (T)

Discovery Information

Discovery Date

2023-03-12

Observatory

ATLAS South Africa, Sutherland

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

1.853073

1-sigma variation

0.000161

Unit

Eccentricity (e)

Value

0.482566

1-sigma variation

0.000046

Unit

Inclination (i)

Value

4.4731

1-sigma variation

0.0003

Unit

Long. of Ascending Node (Ω)

Value

170.1516

1-sigma variation

2.261E-5

Unit

Arg. of Perihelion (ω)

Value

333.1966

1-sigma variation

2.206E-5

Unit

Mean Anomaly (M)

Value

111.60287

1-sigma variation

0.06183

Unit

Perihelion distance

Value

0.958842

1-sigma variation

Unit

Aphelion distance

Value

2.747304

1-sigma variation

Unit

Asc. Node-Earth Sep.

Value

0.000542

1-sigma variation

Unit

Desc. Node-Earth Sep.

Value

1.489956

1-sigma variation

Unit

MOID

Value

0.000267

1-sigma variation

Unit

Orbit Period

Value

921.3767

1-sigma variation

Unit

U parameter

Value

6.2

1-sigma variation

Unit

Covariance Matrix

	a	e	i	Ω	ω	M
a	2.60626E-8	7.49583E-9	5.35666E-8	-3.57384E-9	2.17540E-9	-9.98124E-6
e	7.49583E-9	2.15587E-9	1.54063E-8	-1.02779E-9	6.25224E-10	-2.87069E-6
i	5.35666E-8	1.54063E-8	1.10106E-7	-7.33443E-9	4.43598E-9	-2.05145E-5
Ω	-3.57384E-9	-1.02779E-9	-7.33443E-9	5.11156E-10	-3.60122E-10	1.36869E-6
ω	2.17540E-9	6.25224E-10	4.43598E-9	-3.60122E-10	4.86588E-10	-8.33186E-7
M	-9.98124E-6	-2.87069E-6	-2.05145E-5	1.36869E-6	-8.33186E-7	3.82254E-3

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

26.378

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

14 - 30*

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

1082

Unit

Source

[1]

Normalized RMS of residuals

Value

0.45624

Unit

Source

[1]

Astrometry Summary

First Observation
Last Observation
Total Optical Observations (Discarded)

Optical

Value

Unit

Source

First Observation

Value

2023-03-12.865248

Unit

Source

[2]

Last Observation

Value

2023-04-15.263069

Unit

Source

[2]

Total Optical Observations (Discarded)

Value

136 (6)

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 2023ES 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	1966-03-16 15:55	> 1 d	0.0245437	0.0000217	0.0333429
EARTH	1971-01-14 12:47	> 1 d	0.0705467	0.0595313	0.0157696
EARTH	2023-03-12 17:15	< 1 s	0.0055129	0.0055114	0.0000005
EARTH	2071-01-01 04:35	> 1 d	0.1624552	0.0806249	0.0310753
EARTH	2076-02-27 18:09	> 1 w	0.0277025	0.0066931	0.0152624
EARTH	2081-04-01 22:55	> 1 d	0.1451273	0.0794415	0.0219656

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Stationary Points

Ecc. an. ast.	Ecc. an. Earth	Distance in au	Classification
16.19194090	68.18330672	0.00039838	MINIMUM
180.29914635	222.52087752	1.73437904	SADDLE
1.17941686	223.36991151	1.97197840	SADDLE
180.50420452	42.63610835	3.73453535	MAXIMUM

Download:

MOID Plots

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

Level lines of the squared distance function

2023ES

Date in UTC	MJD	σ	σ_imp	Distance ± Width in RE	Stretching in RE	IP	Impact energy	PS	TS
2083-03-11.004	81929.004	0.859	0.000	0.64 ± 0.003	3.84E5	2.36E-6	1.98E-1	-6.43	0


Based on 136 optical observations (of which 7 are rejected as outliers) from 2023/03/12.865 to 2023/04/15.263.
Coordinates are given on the Target Plane.
Unit is one Earth radius, but impact cross section has radius between 1.72 and 1.72 Earth radii.
Coordinates for LOV = EQU scaled= 1 second= F.
Aegis software version= 4.0, Date of computation=20250805 130500.123 UTC.

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Download Impactor Table as: