Asteroids

2023KH4 help

Last update: 2026-05-29 09:30 UTC

Orbital Properties

Epoch

61200.0

MJD

Orbit type

Aten

Perihelion (q)

0.556

Aphelion (Q)

1.091

Eccentricity (e)

0.325

Inclination (i)

8.2

deg

Orbit period (P)

273.0

Earth MOID

0.00483

U parameter

1.8

Next Earth close approach

Date

2029-05-31

Nominal distance (from Earth center)

0.06473

9684056

Maximum Brightness

22.9

mag

Risk

Object is not in risk list

Physical Properties

Absolute Magnitude (H)

26.8

mag

Diameter

11 - 26*

Taxonomic type

Rotation period (T)

Discovery Information

Discovery Date

2023-05-28

Observatory

University of Arizona Mt. Lemmon Survey

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

0.823490

1-sigma variation

1.596E-8

Unit

Eccentricity (e)

Value

0.325202

1-sigma variation

0.000002

Unit

Inclination (i)

Value

8.2279

1-sigma variation

0.0001

Unit

Long. of Ascending Node (Ω)

Value

240.4556

1-sigma variation

3.193E-5

Unit

Arg. of Perihelion (ω)

Value

215.2839

1-sigma variation

0.0002

Unit

Mean Anomaly (M)

Value

143.79668

1-sigma variation

0.00046

Unit

Perihelion distance

Value

0.555689

1-sigma variation

Unit

Aphelion distance

Value

1.091291

1-sigma variation

Unit

Asc. Node-Earth Sep.

Value

-0.009397

1-sigma variation

Unit

Desc. Node-Earth Sep.

Value

-0.406149

1-sigma variation

Unit

MOID

Value

0.004832

1-sigma variation

Unit

Orbit Period

Value

272.9518

1-sigma variation

Unit

U parameter

Value

1.8

1-sigma variation

Unit

Covariance Matrix

	a	e	i	Ω	ω	M
a	2.54581E-16	2.80468E-14	1.85746E-12	3.77438E-13	2.60986E-12	-7.31654E-12
e	2.80468E-14	3.12998E-12	2.07852E-10	4.35343E-11	2.90206E-10	-8.17604E-10
i	1.85746E-12	2.07852E-10	1.52982E-8	3.60600E-9	1.84577E-8	-5.41199E-8
Ω	3.77438E-13	4.35343E-11	3.60600E-9	1.01935E-9	3.60731E-9	-1.13455E-8
ω	2.60986E-12	2.90206E-10	1.84577E-8	3.60731E-9	2.73803E-8	-7.58810E-8
M	-7.31654E-12	-8.17604E-10	-5.41199E-8	-1.13455E-8	-7.58810E-8	2.13661E-7

Date of computation: 2026-05-29 09:30 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

26.828

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

11 - 26*

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

1098

Unit

Source

[1]

Unobserved

Value

Unit

Source

[1]

Normalized RMS of residuals

Value

0.89106

Unit

Source

[1]

Astrometry Summary

First Observation
Last Observation
Total Optical Observations (Discarded)

Optical

Value

Unit

Source

First Observation

Value

2023-05-26.23922

Unit

Source

[2]

Last Observation

Value

2026-05-28.245026

Unit

Source

[2]

Total Optical Observations (Discarded)

Value

30 (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 2023KH4 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	1950-07-26 14:38	7.9	0.1381444	0.1381068	0.0000126
EARTH	1953-07-30 19:27	< 1 min	0.1784960	0.1783893	0.0000356
EARTH	1979-05-23 00:47	< 1 min	0.1353735	0.1353513	0.0000074
EARTH	1982-05-22 04:12	< 1 min	0.0444794	0.0444772	0.0000008
EARTH	1985-05-25 06:22	< 1 min	0.0235055	0.0234884	0.0000057
EARTH	1988-06-10 08:15	2.0	0.0936091	0.0935978	0.0000038
EARTH	1991-07-07 03:05	1.9	0.1270023	0.1269954	0.0000023
EARTH	1994-07-28 02:04	< 1 min	0.1409451	0.1409398	0.0000018
EARTH	1997-07-30 17:15	< 1 min	0.1971103	0.1971023	0.0000026
EARTH	2020-05-21 17:36	< 1 min	0.1030735	0.1030717	0.0000006
EARTH	2023-05-23 17:46	< 1 s	0.0057606	0.0057604	0.0000001
EARTH	2026-05-24 16:39	< 1 min	0.0161626	0.0161622	0.0000001
EARTH	2029-05-31 21:30	< 1 min	0.0647339	0.0647336	0.0000001
EARTH	2032-06-15 04:28	1.2	0.1039980	0.1039966	0.0000005
EARTH	2035-07-03 23:17	1.7	0.1246226	0.1246180	0.0000015
EARTH	2038-07-21 20:09	1.2	0.1308864	0.1308807	0.0000019
EARTH	2041-07-30 18:03	< 1 min	0.1458410	0.1458369	0.0000014
EARTH	2044-07-31 12:19	< 1 min	0.1899410	0.1899250	0.0000053
EARTH	2073-05-22 22:24	< 1 min	0.1484176	0.1483745	0.0000144
EARTH	2076-05-21 13:12	< 1 min	0.0707503	0.0707100	0.0000134
EARTH	2079-05-23 12:21	< 1 min	0.0086391	0.0086185	0.0000069
EARTH	2082-05-22 21:36	< 1 min	0.0152414	0.0152347	0.0000022
EARTH	2085-05-21 20:27	< 1 min	0.0762912	0.0762627	0.0000095
EARTH	2088-05-22 20:47	< 1 min	0.1517873	0.1517419	0.0000151
EARTH	2119-08-05 05:30	< 1 min	0.1799753	0.1798653	0.0000367
EARTH	2122-08-03 14:44	3.2	0.1420911	0.1420315	0.0000199
EARTH	2125-07-24 09:48	12.7	0.1325286	0.1325129	0.0000053

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Stationary Points

Ecc. an. ast.	Ecc. an. Earth	Distance in au	Classification
134.10152279	137.04449872	0.00483234	MINIMUM
3.60285374	356.20245220	0.43278871	SADDLE
0.32554347	171.76249753	1.57110402	SADDLE
178.81158613	350.06279842	2.07328734	MAXIMUM

Download:

MOID Plots

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