Asteroids

2025KE4 help

Last update: 2025-05-27 07:22 UTC

Orbital Properties

Epoch

60800.0

MJD

Orbit type

Apollo

Perihelion (q)

0.934

Aphelion (Q)

1.161

Eccentricity (e)

0.108

Inclination (i)

2.7

deg

Orbit period (P)

391.4

Earth MOID

0.00022

U parameter

6.6

Next Earth close approach

Date

2026-01-04

Nominal distance (from Earth center)

0.17515

26201995

Maximum Brightness

26.9

mag

Risk

Object is in risk list

Object is not in priority list

Physical Properties

Absolute Magnitude (H)

29.5

mag

Diameter

3 - 8*

Taxonomic type

Rotation period (T)

Discovery Information

Discovery Date

2025-05-26

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

60800.0000

1-sigma variation

Unit

MJD

Semimajor Axis

Value

1.047160

1-sigma variation

0.000080

Unit

Eccentricity (e)

Value

0.108468

1-sigma variation

0.000066

Unit

Inclination (i)

Value

2.7189

1-sigma variation

0.0012

Unit

Long. of Ascending Node (Ω)

Value

69.5048

1-sigma variation

0.0013

Unit

Arg. of Perihelion (ω)

Value

259.1010

1-sigma variation

0.0290

Unit

Mean Anomaly (M)

Value

268.54545

1-sigma variation

0.03778

Unit

Perihelion distance

Value

0.933576

1-sigma variation

Unit

Aphelion distance

Value

1.160744

1-sigma variation

Unit

Asc. Node-Earth Sep.

Value

0.070177

1-sigma variation

Unit

Desc. Node-Earth Sep.

Value

0.000572

1-sigma variation

Unit

MOID

Value

0.000221

1-sigma variation

Unit

Orbit Period

Value

391.3975

1-sigma variation

Unit

U parameter

Value

6.6

1-sigma variation

Unit

Covariance Matrix

	a	e	i	Ω	ω	M
a	6.44684E-9	4.93285E-9	8.61703E-8	-1.05601E-7	-2.28906E-6	3.02599E-6
e	4.93285E-9	4.29120E-9	7.88612E-8	-7.87455E-8	-1.63506E-6	2.25656E-6
i	8.61703E-8	7.88612E-8	1.47668E-6	-1.36218E-6	-2.76812E-5	3.89749E-5
Ω	-1.05601E-7	-7.87455E-8	-1.36218E-6	1.74229E-6	3.79550E-5	-4.98013E-5
ω	-2.28906E-6	-1.63506E-6	-2.76812E-5	3.79550E-5	8.39001E-4	-1.08768E-3
M	3.02599E-6	2.25656E-6	3.89749E-5	-4.98013E-5	-1.08768E-3	1.42702E-3

Date of computation: 2025-05-27 07:22 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

29.48

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

3 - 8*

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
No.[1]	NameESA Aegis	AdditionalESA orbit determination and impact monitoring system
No.[2]	NameEstimation	AdditionalEstimated 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

Unit

Source

[1]

Normalized RMS of residuals

Value

0.853327

Unit

Source

[1]

Astrometry Summary

First Observation
Last Observation
Total Optical Observations (Discarded)

Optical

Value

Unit

Source

First Observation

Value

2025-05-26.229855

Unit

Source

[2]

Last Observation

Value

2025-05-27.27796

Unit

Source

[2]

Total Optical Observations (Discarded)

Value

26 (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

Close Approaches for 2025KE4 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	1955-04-12 04:05	> 1 mo	0.1357206	0.0294209	2.8805009
EARTH	1955-08-12 04:12	> 1 mo	0.0856128	0.0831795	0.2397975
EARTH	1955-12-07 05:05	> 1 mo	0.1231167	0.0646276	2.9766122
EARTH	1968-05-26 03:20	> 1 mo	0.0297827	0.0022656	0.4236136
EARTH	1969-01-26 13:25	> 1 mo	0.1779554	0.1247665	0.0545090
EARTH	1969-11-04 17:29	> 1 w	0.1558327	0.0273736	0.3596648
EARTH	1982-05-22 03:45	> 1 w	0.1023209	0.0035465	0.4636993
EARTH	1983-02-12 20:28	> 1 mo	0.1817553	0.1803076	0.0058185
EARTH	1983-11-02 10:51	> 1 w	0.0797540	0.0270024	0.4699495
EARTH	1996-05-20 13:13	> 1 w	0.1353902	0.0008547	0.1923384
EARTH	1997-02-19 07:08	> 1 mo	0.1819841	0.1313936	0.0190424
EARTH	1997-11-01 02:54	> 1 w	0.0560094	0.0272043	0.2266479
EARTH	2010-05-29 01:40	1281.8	0.0220948	0.0001748	0.0098209
EARTH	2011-02-01 09:38	> 1 w	0.1756972	0.1724988	0.0010792
EARTH	2011-11-08 08:09	479.0	0.1273586	0.0977431	0.0099280
EARTH	2025-05-31 22:38	1.4	0.0070288	0.0070201	0.0000029
EARTH	2026-01-04 06:17	381.8	0.1751495	0.1748743	0.0000918
EARTH	2037-07-11 13:15	> 1 w	0.0710572	0.0606677	0.0035377
EARTH	2037-12-13 16:33	> 1 w	0.1464544	0.1358470	0.0035989
EARTH	2049-03-19 16:58	> 1 d	0.1714141	0.1670263	0.0014629
EARTH	2049-10-15 16:44	> 1 d	0.0504748	0.0408430	0.0034525
EARTH	2061-03-05 05:49	136.7	0.1848813	0.1847681	0.0000378
EARTH	2061-10-22 01:35	76.1	0.0353520	0.0352333	0.0000398
EARTH	2072-05-25 16:58	407.6	0.0451503	0.0330517	0.0040329
EARTH	2073-01-15 17:26	> 1 d	0.1863707	0.1838433	0.0008445
EARTH	2084-05-29 01:31	> 1 d	0.0072379	0.0014943	0.0167050
EARTH	2085-01-31 00:20	> 1 mo	0.1733319	0.1506098	0.0204021
EARTH	2085-11-08 04:18	> 1 d	0.1192203	0.0170131	0.3765581
EARTH	2100-03-20 18:38	> 1 mo	0.1591377	0.0314098	1.1229379
EARTH	2100-09-23 02:56	> 1 mo	0.0787420	0.0097500	1.8695376
EARTH	2100-11-19 08:20	> 1 mo	0.0868370	0.0361022	3.4931775
EARTH	2115-05-25 22:39	> 1 d	0.0678302	0.0005762	0.6212249
EARTH	2116-02-17 18:26	> 1 mo	0.1749067	0.0322275	0.0521304
EARTH	2116-11-06 00:57	1144.3	0.0433471	0.0201104	0.1225667

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Stationary Points

Ecc. an. ast.	Ecc. an. Earth	Distance in au	Classification
287.10794137	146.92282400	0.00022090	MINIMUM
65.66055744	298.68139815	0.02459759	MINIMUM
357.06579945	223.78280855	0.08997707	SADDLE
176.65915970	42.81385340	0.17949245	SADDLE
354.25652246	40.59047296	1.92111041	SADDLE
174.91356612	221.24957223	2.17187515	MAXIMUM

Download:

MOID Plots

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

Level lines of the squared distance function

2025KE4

Date in UTC	MJD	σ	σ_imp	Distance ± Width in RE	Stretching in RE/σ	IP	Exp. energy	PS	TS
2075-11-27.310	79268.310	4.705	0.000	0.69 ± 2.373	1.36E6	1.97E-11	4.08E-14	-13.04	0


Based on 26 optical observations (of which 1 are rejected as outliers) from 2025/05/26.230 to 2025/05/27.278.
Coordinates are given on the Target Plane.
Unit is one Earth radius, but impact cross section has radius between 3.18 and 3.18 Earth radii.
Coordinates for LOV = EQU scaled= 1 second= F.
Aegis software version= 5.0, Date of computation=20250527 073240.072 UTC.

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Download Impactor Table as: