Asteroids

2025KF4 help

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

Orbital Properties

Epoch

61200.0

MJD

Orbit type

Aten

Perihelion (q)

0.646

Aphelion (Q)

1.029

Eccentricity (e)

0.229

Inclination (i)

9.8

deg

Orbit period (P)

279.8

Earth MOID

0.00196

U parameter

6.6

Next Earth close approach

Date

2035-06-26

Nominal distance (from Earth center)

0.17166

25680304

Maximum Brightness

mag

Risk

Object is not in risk list

Physical Properties

Absolute Magnitude (H)

28.7

mag

Diameter

5 - 11*

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

61200.0000

1-sigma variation

Unit

MJD

Semimajor Axis

Value

0.837264

1-sigma variation

0.000048

Unit

Eccentricity (e)

Value

0.228762

1-sigma variation

0.000079

Unit

Inclination (i)

Value

9.7896

1-sigma variation

0.0049

Unit

Long. of Ascending Node (Ω)

Value

242.6184

1-sigma variation

0.0001

Unit

Arg. of Perihelion (ω)

Value

197.6642

1-sigma variation

0.0002

Unit

Mean Anomaly (M)

Value

283.11399

1-sigma variation

0.03823

Unit

Perihelion distance

Value

0.645730

1-sigma variation

Unit

Aphelion distance

Value

1.028797

1-sigma variation

Unit

Asc. Node-Earth Sep.

Value

0.002156

1-sigma variation

Unit

Desc. Node-Earth Sep.

Value

-0.336182

1-sigma variation

Unit

MOID

Value

0.001958

1-sigma variation

Unit

Orbit Period

Value

279.8283

1-sigma variation

Unit

U parameter

Value

6.6

1-sigma variation

Unit

Covariance Matrix

	a	e	i	Ω	ω	M
a	2.29330E-9	-3.77337E-9	-2.34389E-7	-4.22154E-9	5.90477E-9	-1.83068E-6
e	-3.77337E-9	6.20871E-9	3.85660E-7	6.95916E-9	-9.67142E-9	3.01208E-6
i	-2.34389E-7	3.85660E-7	2.39669E-5	4.22118E-7	-6.12364E-7	1.87131E-4
Ω	-4.22154E-9	6.95916E-9	4.22118E-7	2.18130E-8	7.48101E-9	3.32331E-6
ω	5.90477E-9	-9.67142E-9	-6.12364E-7	7.48101E-9	5.30532E-8	-4.79690E-6
M	-1.83068E-6	3.01208E-6	1.87131E-4	3.32331E-6	-4.79690E-6	1.46157E-3

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

28.734

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

5 - 11*

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

369

Unit

Source

[1]

Normalized RMS of residuals

Value

0.604238

Unit

Source

[1]

Astrometry Summary

First Observation
Last Observation
Total Optical Observations (Discarded)

Optical

Value

Unit

Source

First Observation

Value

2025-05-26.274998

Unit

Source

[2]

Last Observation

Value

2025-05-30.31415

Unit

Source

[2]

Total Optical Observations (Discarded)

Value

21 (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 2025KF4 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	1956-05-17 09:30	44.4	0.1064556	0.0986380	0.0026076
EARTH	1966-05-31 09:46	> 1 d	0.0378632	0.0207526	0.0058353
EARTH	1979-05-18 06:51	113.6	0.0896673	0.0790795	0.0035341
EARTH	1989-06-02 23:52	589.1	0.0498457	0.0452607	0.0015376
EARTH	2002-05-18 01:47	282.4	0.0821987	0.0583195	0.0079870
EARTH	2012-06-16 20:17	1432.5	0.0974189	0.0857350	0.0040242
EARTH	2025-05-23 16:56	< 1 min	0.0018684	0.0018657	0.0000009
EARTH	2035-06-26 05:25	329.3	0.1716622	0.1586318	0.0044067
EARTH	2038-05-16 14:43	42.1	0.1325627	0.1117913	0.0069367
EARTH	2048-06-11 04:39	> 1 d	0.0886812	0.0684953	0.0069959
EARTH	2061-05-29 18:33	> 1 d	0.0359618	0.0203059	0.0052981
EARTH	2074-05-31 17:21	> 1 d	0.0441408	0.0150428	0.0103508
EARTH	2087-06-20 18:22	1356.5	0.1282005	0.1074166	0.0072308
EARTH	2090-05-16 08:52	16.5	0.1341489	0.1102549	0.0079806
EARTH	2103-05-22 10:58	71.3	0.0196659	0.0181943	0.0004907
EARTH	2113-06-26 00:47	245.4	0.1600345	0.1526793	0.0024740
EARTH	2116-05-16 21:42	21.0	0.1563487	0.1449341	0.0038075
EARTH	2126-06-01 15:26	> 1 d	0.0461363	0.0303520	0.0053407

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Stationary Points

Ecc. an. ast.	Ecc. an. Earth	Distance in au	Classification
157.76534176	140.65626053	0.00037648	MINIMUM
6.93517598	347.71466372	0.34219453	SADDLE
358.64394390	157.64192208	1.66214470	SADDLE
177.50532866	336.40591230	2.01306338	MAXIMUM

Download:

MOID Plots

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