Asteroids

2023SZ help

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

Orbital Properties

Epoch

61200.0

MJD

Orbit type

Aten

Perihelion (q)

0.938

Aphelion (Q)

1.042

Eccentricity (e)

0.052

Inclination (i)

8.0

deg

Orbit period (P)

359.9

Earth MOID

0.01056

U parameter

5.4

Next Earth close approach

Date

2084-04-05

Nominal distance (from Earth center)

0.15678

23454205

Maximum Brightness

mag

Risk

Object is not in risk list

Physical Properties

Absolute Magnitude (H)

25.8

mag

Diameter

18 - 40*

Taxonomic type

Rotation period (T)

Discovery Information

Discovery Date

2023-09-16

Observatory

Kitt Peak-Bok

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

0.990185

1-sigma variation

0.000011

Unit

Eccentricity (e)

Value

0.052322

1-sigma variation

0.000078

Unit

Inclination (i)

Value

8.0202

1-sigma variation

0.0148

Unit

Long. of Ascending Node (Ω)

Value

181.9231

1-sigma variation

0.0018

Unit

Arg. of Perihelion (ω)

Value

275.6851

1-sigma variation

0.0173

Unit

Mean Anomaly (M)

Value

175.30032

1-sigma variation

0.02259

Unit

Perihelion distance

Value

0.938377

1-sigma variation

Unit

Aphelion distance

Value

1.041994

1-sigma variation

Unit

Asc. Node-Earth Sep.

Value

-0.013915

1-sigma variation

Unit

Desc. Node-Earth Sep.

Value

-0.010901

1-sigma variation

Unit

MOID

Value

0.010561

1-sigma variation

Unit

Orbit Period

Value

359.8928

1-sigma variation

Unit

U parameter

Value

5.4

1-sigma variation

Unit

Covariance Matrix

	a	e	i	Ω	ω	M
a	1.29162E-10	-1.60161E-11	1.99418E-8	-1.57372E-8	-1.62129E-7	-7.47884E-8
e	-1.60161E-11	6.10508E-9	1.14299E-6	8.66103E-8	-7.38600E-7	1.69745E-6
i	1.99418E-8	1.14299E-6	2.18088E-4	1.34544E-5	-1.67423E-4	3.05301E-4
Ω	-1.57372E-8	8.66103E-8	1.34544E-5	3.09616E-6	9.22337E-6	3.25304E-5
ω	-1.62129E-7	-7.38600E-7	-1.67423E-4	9.22337E-6	2.97836E-4	-1.15990E-4
M	-7.47884E-8	1.69745E-6	3.05301E-4	3.25304E-5	-1.15990E-4	5.10272E-4

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

25.837

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

18 - 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

933

Unit

Source

[1]

Normalized RMS of residuals

Value

0.513178

Unit

Source

[1]

Astrometry Summary

First Observation
Last Observation
Total Optical Observations (Discarded)

Optical

Value

Unit

Source

First Observation

Value

2023-09-16.126906

Unit

Source

[2]

Last Observation

Value

2023-09-19.153128

Unit

Source

[2]

Total Optical Observations (Discarded)

Value

25 (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

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 2023SZ 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	1976-04-04 12:20	193.1	0.0834770	0.0828252	0.0002183
EARTH	1976-10-03 04:26	72.1	0.1611510	0.1578089	0.0011147
EARTH	1977-03-21 09:45	669.2	0.0420357	0.0336078	0.0028858
EARTH	1977-09-27 23:46	426.7	0.0410304	0.0289833	0.0040935
EARTH	1978-02-25 08:22	735.3	0.1557698	0.1423953	0.0044873
EARTH	1978-09-19 21:51	436.8	0.0764614	0.0608388	0.0052273
EARTH	2021-04-08 21:36	87.9	0.1426068	0.1409207	0.0005622
EARTH	2022-03-27 20:13	94.4	0.0264163	0.0255172	0.0003051
EARTH	2022-09-30 02:22	7.7	0.1117643	0.1112349	0.0001765
EARTH	2023-03-14 17:24	12.4	0.0825206	0.0816096	0.0003040
EARTH	2023-09-25 20:26	< 1 min	0.0141914	0.0141085	0.0000277
EARTH	2024-03-09 00:35	28.3	0.1605244	0.1595282	0.0003321
EARTH	2024-09-20 11:22	13.3	0.0542747	0.0537373	0.0001792
EARTH	2025-09-15 05:00	16.1	0.1374875	0.1365733	0.0003048
EARTH	2084-04-05 11:44	285.7	0.1567817	0.1422036	0.0048652
EARTH	2085-03-30 00:24	444.3	0.0714190	0.0581555	0.0044489
EARTH	2085-10-02 23:47	175.8	0.1725215	0.1608660	0.0038853
EARTH	2086-03-23 21:29	451.2	0.0128187	0.0126462	0.0004743
EARTH	2086-10-01 06:17	951.1	0.1125375	0.0797376	0.0112024
EARTH	2087-03-17 05:17	> 1 d	0.0745947	0.0284959	0.0160668
EARTH	2087-09-26 15:22	> 1 d	0.0405762	0.0145188	0.0218558
EARTH	2088-03-11 21:23	432.4	0.1433548	0.0779579	0.0221699
EARTH	2088-09-20 20:44	> 1 d	0.0261519	0.0090564	0.0240212
EARTH	2089-09-14 04:25	> 1 d	0.1202495	0.1048464	0.0051456

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Stationary Points

Ecc. an. ast.	Ecc. an. Earth	Distance in au	Classification
266.17141444	260.61425850	0.01014263	MINIMUM
82.69036878	81.10826204	0.01484127	MINIMUM
354.54729785	350.86093596	0.14169878	SADDLE
174.30726160	170.88630574	0.14598066	SADDLE
357.13640168	173.57049229	1.95184155	SADDLE
179.87404030	356.31425257	2.02094724	MAXIMUM

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MOID Plots

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