Asteroids

2023KH4 help

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

272.9

Earth MOID

0.00483

U parameter

7.3

Next Earth close approach

Date

2026-05-24

Nominal distance (from Earth center)

0.01546

2312280

Maximum Brightness

20.1

mag

Risk

Object is not in risk list

Physical Properties

Absolute Magnitude (H)

26.9

mag

Diameter

11 - 25*

Taxonomic type

Rotation period (T)

Discovery Information

Discovery Date

2023-05-28

Observatory

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

0.823458

1-sigma variation

0.000108

Unit

Eccentricity (e)

Value

0.325193

1-sigma variation

0.000025

Unit

Inclination (i)

Value

8.2223

1-sigma variation

0.0181

Unit

Long. of Ascending Node (Ω)

Value

240.4540

1-sigma variation

0.0049

Unit

Arg. of Perihelion (ω)

Value

215.2749

1-sigma variation

0.0306

Unit

Mean Anomaly (M)

Value

143.74661

1-sigma variation

0.15881

Unit

Perihelion distance

Value

0.555676

1-sigma variation

Unit

Aphelion distance

Value

1.091241

1-sigma variation

Unit

Asc. Node-Earth Sep.

Value

-0.009399

1-sigma variation

Unit

Desc. Node-Earth Sep.

Value

-0.406178

1-sigma variation

Unit

MOID

Value

0.004832

1-sigma variation

Unit

Orbit Period

Value

272.9361

1-sigma variation

Unit

U parameter

Value

7.3

1-sigma variation

Unit

Covariance Matrix

	a	e	i	Ω	ω	M
a	1.17268E-8	2.56231E-9	1.95897E-6	5.25813E-7	3.31261E-6	1.71960E-5
e	2.56231E-9	6.38675E-10	4.29307E-7	1.11621E-7	7.34057E-7	3.73677E-6
i	1.95897E-6	4.29307E-7	3.27280E-4	8.77947E-5	5.53531E-4	2.87227E-3
Ω	5.25813E-7	1.11621E-7	8.77947E-5	2.37231E-5	1.48099E-4	7.71893E-4
ω	3.31261E-6	7.34057E-7	5.53531E-4	1.48099E-4	9.37092E-4	4.85489E-3
M	1.71960E-5	3.73677E-6	2.87227E-3	7.71893E-4	4.85489E-3	2.52213E-2

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

26.874

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 - 25*

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

1046

Unit

Source

[1]

Normalized RMS of residuals

Value

0.63422

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

2023-05-29.285332

Unit

Source

[2]

Total Optical Observations (Discarded)

Value

23 (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	1950-07-15 13:30	> 1 mo	0.1306027	0.1292637	0.0156538
EARTH	1953-07-29 14:14	> 1 d	0.1504405	0.1356944	0.0620393
EARTH	1979-05-23 02:59	216.3	0.1406325	0.1103516	0.0100938
EARTH	1982-05-22 04:23	140.1	0.0431563	0.0178521	0.0084629
EARTH	1985-05-25 23:11	> 1 d	0.0298097	0.0028668	0.0199712
EARTH	1988-06-12 00:04	> 1 d	0.0972592	0.0654096	0.0112825
EARTH	1991-07-08 21:12	> 1 d	0.1278535	0.1250005	0.0025478
EARTH	1994-07-28 15:07	> 1 d	0.1426559	0.1352842	0.0057661
EARTH	2020-05-21 17:20	47.2	0.1023060	0.0949619	0.0024480
EARTH	2023-05-23 17:45	< 1 min	0.0057592	0.0057433	0.0000053
EARTH	2026-05-24 15:12	277.8	0.0154566	0.0089256	0.0022601
EARTH	2029-05-31 22:18	207.4	0.0648207	0.0635365	0.0004281
EARTH	2032-06-15 11:11	> 1 d	0.1044246	0.0999008	0.0015234
EARTH	2035-07-04 12:19	> 1 d	0.1248558	0.1228612	0.0008066
EARTH	2038-07-22 11:10	> 1 d	0.1309962	0.1308022	0.0004286
EARTH	2041-07-30 22:11	618.7	0.1473586	0.1363712	0.0053946
EARTH	2044-07-31 10:27	312.1	0.1935181	0.1607998	0.0124219
EARTH	2073-05-22 15:19	1242.1	0.1355693	0.0061656	0.0431750
EARTH	2076-05-21 13:23	210.9	0.0587752	0.0042005	0.0398666
EARTH	2079-05-23 22:48	> 1 d	0.0062694	0.0059517	0.0078929
EARTH	2082-06-04 05:35	> 1 mo	0.0759616	0.0124539	0.2789407
EARTH	2085-06-26 22:56	> 1 mo	0.1184486	0.1017900	0.1879051
EARTH	2088-07-21 16:23	> 1 mo	0.1280443	0.1277800	0.0564141
EARTH	2091-08-01 09:00	> 1 w	0.1533537	0.1312295	0.8063523
EARTH	2114-05-25 11:51	> 1 mo	0.1963662	0.0005714	4.0963516
EARTH	2117-05-22 21:50	> 1 mo	0.0903276	0.0038267	4.1738882
EARTH	2120-05-24 07:36	> 1 mo	0.0078369	0.0068123	1.7056032
EARTH	2123-06-16 05:11	> 1 mo	0.1011788	0.0517977	11.9482670
EARTH	2126-07-21 08:32	> 1 mo	0.1254748	0.1253504	1.5626162

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Stationary Points

Ecc. an. ast.	Ecc. an. Earth	Distance in au	Classification
134.24892266	140.50083656	0.00576283	MINIMUM
4.03188845	0.05428179	0.43076310	SADDLE
0.65889236	175.49343464	1.57468327	SADDLE
178.93791396	353.57558076	2.07375084	MAXIMUM

Download:

MOID Plots

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