Asteroids

2023KU2 help

Last update: 2025-09-10 00:30 UTC

Orbital Properties

Epoch

61000.0

MJD

Orbit type

Apollo

Perihelion (q)

0.847

Aphelion (Q)

3.983

Eccentricity (e)

0.649

Inclination (i)

3.1

deg

Orbit period (P)

1370.9

Earth MOID

0.00380

U parameter

7.5

Next Earth close approach

Date

2038-05-24

Nominal distance (from Earth center)

0.02708

4050484

Maximum Brightness

21.5

mag

Risk

Object is in risk list

Physical Properties

Absolute Magnitude (H)

27.3

mag

Diameter

9 - 21*

Taxonomic type

Rotation period (T)

Discovery Information

Discovery Date

2023-05-24

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

61000.0000

1-sigma variation

Unit

MJD

Semimajor Axis

Value

2.415110

1-sigma variation

0.002597

Unit

Eccentricity (e)

Value

0.649090

1-sigma variation

0.000421

Unit

Inclination (i)

Value

3.1275

1-sigma variation

0.0013

Unit

Long. of Ascending Node (Ω)

Value

69.8343

1-sigma variation

0.0005

Unit

Arg. of Perihelion (ω)

Value

230.4529

1-sigma variation

0.0003

Unit

Mean Anomaly (M)

Value

228.06560

1-sigma variation

0.36811

Unit

Perihelion distance

Value

0.847486

1-sigma variation

Unit

Aphelion distance

Value

3.982734

1-sigma variation

Unit

Asc. Node-Earth Sep.

Value

1.394008

1-sigma variation

Unit

Desc. Node-Earth Sep.

Value

-0.026287

1-sigma variation

Unit

MOID

Value

0.003796

1-sigma variation

Unit

Orbit Period

Value

1370.8936

1-sigma variation

Unit

U parameter

Value

7.5

1-sigma variation

Unit

Covariance Matrix

	a	e	i	Ω	ω	M
a	6.74205E-6	1.09243E-6	3.32659E-6	-1.28450E-6	8.55071E-7	-9.55808E-4
e	1.09243E-6	1.77010E-7	5.39019E-7	-2.08135E-7	1.38570E-7	-1.54872E-4
i	3.32659E-6	5.39019E-7	1.64169E-6	-6.34364E-7	4.23341E-7	-4.71605E-4
Ω	-1.28450E-6	-2.08135E-7	-6.34364E-7	2.45890E-7	-1.65852E-7	1.82101E-4
ω	8.55071E-7	1.38570E-7	4.23341E-7	-1.65852E-7	1.19686E-7	-1.21223E-4
M	-9.55808E-4	-1.54872E-4	-4.71605E-4	1.82101E-4	-1.21223E-4	1.35503E-1

Date of computation: 2025-09-10 00:30 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

27.264

Unit

mag

Source

[1]

Slope Parameter (G)

Value

0.15**

Unit

mag

Source

[1]

Albedo
Diameter

Size and albedo

Value

Unit

Source

Albedo

Value

0.05 - 0.25

Unit

Source

[2]

Diameter

Value

9 - 21*

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

847

Unit

Source

[1]

Normalized RMS of residuals

Value

0.635842

Unit

Source

[1]

Astrometry Summary

First Observation
Last Observation
Total Optical Observations (Discarded)

Optical

Value

Unit

Source

First Observation

Value

2023-05-22.4188

Unit

Source

[2]

Last Observation

Value

2023-05-28.02197

Unit

Source

[2]

Total Optical Observations (Discarded)

Value

53 (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

Close Approaches for 2023KU2 from 1950 to 2125

Body	Date in UTC	Time uncert. in min	Nominal distance in au	Min. possible distance in au	Distance uncert. in au
EARTH	1958-09-17 02:14	> 1 mo	0.0651807	0.0581729	0.2243236
EARTH	1977-08-04 00:39	> 1 mo	0.1554176	0.1011960	0.1104169
EARTH	2000-07-16 18:21	> 1 mo	0.1338001	0.0957955	0.0262926
EARTH	2023-05-28 15:41	< 1 s	0.0072497	0.0072381	0.0000039
EARTH	2038-05-24 05:06	> 1 w	0.0270758	0.0044160	0.1459768
EARTH	2098-05-18 22:00	> 1 mo	0.1128552	0.0007099	3.6301089
EARTH	2124-09-05 10:54	> 1 mo	0.1022544	0.0506331	0.4288224

Download as:

Stationary Points

Ecc. an. ast.	Ecc. an. Earth	Distance in au	Classification
333.67231297	143.79292278	0.00317492	MINIMUM
25.73123850	251.54955761	0.05353404	MINIMUM
0.18235189	198.74468908	0.16982676	SADDLE
359.66817993	17.60008041	1.83424833	SADDLE
179.94900429	17.89574665	2.99957977	SADDLE
179.89391837	197.86815360	4.99762862	MAXIMUM

Download:

MOID Plots

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

Level lines of the squared distance function

2023KU2

Date in UTC	MJD	σ	σ_imp	Distance ± Width in RE	Stretching in RE	IP	Impact energy	PS	TS
2064-05-30.257	75070.257	-3.537	0.000	0.49 ± 0.001	8.56E3	2.10E-7	9.81E-2	-7.56	0
2117-05-28.123	94425.123	-0.760	0.000	0.60 ± 0.001	8.57E5	7.60E-7	1.07E-1	-7.33	0


Based on 53 optical observations (of which 0 are rejected as outliers) from 2023/05/22.419 to 2023/05/28.022.
Coordinates are given on the Target Plane.
Unit is one Earth radius, but impact cross section has radius between 1.25 and 1.25 Earth radii.
Coordinates for LOV = EQU scaled= 1 second= F.
Aegis software version= 4.0, Date of computation=20250805 130500.123 UTC.

Download this part as:

Download Impactor Table as: