Asteroids

2023SZ3 help

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

Orbital Properties

Epoch

61200.0

MJD

Orbit type

Apollo

Perihelion (q)

0.971

Aphelion (Q)

1.646

Eccentricity (e)

0.258

Inclination (i)

16.1

deg

Orbit period (P)

546.8

Earth MOID

0.01673

U parameter

8.5

Next Earth close approach

Date

2026-09-15

Nominal distance (from Earth center)

0.02182

3264642

Maximum Brightness

17.5

mag

Risk

Object is not in risk list

Physical Properties

Absolute Magnitude (H)

24.1

mag

Diameter

40 - 90*

Taxonomic type

Rotation period (T)

Discovery Information

Discovery Date

2023-09-18

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

1.308693

1-sigma variation

0.002105

Unit

Eccentricity (e)

Value

0.257667

1-sigma variation

0.001239

Unit

Inclination (i)

Value

16.1473

1-sigma variation

0.0497

Unit

Long. of Ascending Node (Ω)

Value

174.7515

1-sigma variation

0.0037

Unit

Arg. of Perihelion (ω)

Value

138.2715

1-sigma variation

0.0301

Unit

Mean Anomaly (M)

Value

318.73402

1-sigma variation

1.66621

Unit

Perihelion distance

Value

0.971485

1-sigma variation

Unit

Aphelion distance

Value

1.645901

1-sigma variation

Unit

Asc. Node-Earth Sep.

Value

0.518332

1-sigma variation

Unit

Desc. Node-Earth Sep.

Value

0.019235

1-sigma variation

Unit

MOID

Value

0.016731

1-sigma variation

Unit

Orbit Period

Value

546.8335

1-sigma variation

Unit

U parameter

Value

8.5

1-sigma variation

Unit

Covariance Matrix

	a	e	i	Ω	ω	M
a	4.43274E-6	2.60944E-6	1.04691E-4	-7.84731E-6	6.33463E-5	-3.50806E-3
e	2.60944E-6	1.53611E-6	6.16288E-5	-4.61952E-6	3.72902E-5	-2.06510E-3
i	1.04691E-4	6.16288E-5	2.47255E-3	-1.85336E-4	1.49608E-3	-8.28520E-2
Ω	-7.84731E-6	-4.61952E-6	-1.85336E-4	1.38924E-5	-1.12140E-4	6.21034E-3
ω	6.33463E-5	3.72902E-5	1.49608E-3	-1.12140E-4	9.05309E-4	-5.01321E-2
M	-3.50806E-3	-2.06510E-3	-8.28520E-2	6.21034E-3	-5.01321E-2	2.77627E0

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

24.094

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

40 - 90*

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

1064

Unit

Source

[1]

Normalized RMS of residuals

Value

0.521998

Unit

Source

[1]

Astrometry Summary

First Observation
Last Observation
Total Optical Observations (Discarded)

Optical

Value

Unit

Source

First Observation

Value

2023-09-10.10935

Unit

Source

[2]

Last Observation

Value

2023-09-22.917326

Unit

Source

[2]

Total Optical Observations (Discarded)

Value

21 (1)

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 2023SZ3 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	2017-09-27 14:42	> 1 d	0.1917425	0.0038386	0.0844897
EARTH	2020-09-22 05:59	> 1 d	0.1010512	0.0125319	0.0448470
EARTH	2023-09-18 04:30	< 1 min	0.0291304	0.0288355	0.0000983
EARTH	2026-09-15 07:47	> 1 d	0.0218228	0.0170590	0.0278981
EARTH	2029-09-09 13:14	> 1 w	0.0826179	0.0113434	0.1204162
EARTH	2032-08-31 07:01	> 1 w	0.1618843	0.0154089	0.1773312
EARTH	2111-09-25 12:16	> 1 mo	0.1209463	0.0091899	0.9333483
EARTH	2114-09-20 03:28	> 1 mo	0.0409707	0.0151860	0.7424840
EARTH	2117-09-16 08:28	> 1 w	0.0201638	0.0158877	0.1232675
EARTH	2120-09-08 20:21	> 1 w	0.0976201	0.0065509	0.2014840
EARTH	2123-08-28 23:40	> 1 mo	0.1880010	0.0330945	0.5625533

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Stationary Points

Ecc. an. ast.	Ecc. an. Earth	Distance in au	Classification
31.30969432	249.64320669	0.01673131	MINIMUM
167.17636169	19.67536766	0.70987168	SADDLE
354.30631310	22.73393964	1.94693301	SADDLE
182.06847099	211.02713332	2.64989540	MAXIMUM

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MOID Plots

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