Asteroids

2025KB1 help

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

Orbital Properties

Epoch

61200.0

MJD

Orbit type

Aten

Perihelion (q)

0.707

Aphelion (Q)

1.057

Eccentricity (e)

0.199

Inclination (i)

14.7

deg

Orbit period (P)

302.5

Earth MOID

0.01819

U parameter

5.6

Next Earth close approach

Date

2030-05-24

Nominal distance (from Earth center)

0.16662

24926000

Maximum Brightness

24.5

mag

Risk

Object is in risk list

Physical Properties

Absolute Magnitude (H)

25.3

mag

Diameter

24 - 50*

Taxonomic type

Rotation period (T)

Discovery Information

Discovery Date

2025-05-20

Observatory

Palomar Mountain--ZTF

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

0.881940

1-sigma variation

0.000011

Unit

Eccentricity (e)

Value

0.198688

1-sigma variation

0.000032

Unit

Inclination (i)

Value

14.6578

1-sigma variation

0.0040

Unit

Long. of Ascending Node (Ω)

Value

238.9618

1-sigma variation

1.440E-5

Unit

Arg. of Perihelion (ω)

Value

154.3248

1-sigma variation

0.0027

Unit

Mean Anomaly (M)

Value

314.89227

1-sigma variation

0.01449

Unit

Perihelion distance

Value

0.706709

1-sigma variation

Unit

Aphelion distance

Value

1.057171

1-sigma variation

Unit

Asc. Node-Earth Sep.

Value

0.020147

1-sigma variation

Unit

Desc. Node-Earth Sep.

Value

-0.269853

1-sigma variation

Unit

MOID

Value

0.018189

1-sigma variation

Unit

Orbit Period

Value

302.5219

1-sigma variation

Unit

U parameter

Value

5.6

1-sigma variation

Unit

Covariance Matrix

	a	e	i	Ω	ω	M
a	1.23054E-10	-3.60279E-10	-4.39447E-8	1.55204E-10	2.96664E-8	-1.60635E-7
e	-3.60279E-10	1.05612E-9	1.28817E-7	-4.57580E-10	-8.72038E-8	4.70878E-7
i	-4.39447E-8	1.28817E-7	1.57133E-5	-5.57684E-8	-1.06355E-5	5.74332E-5
Ω	1.55204E-10	-4.57580E-10	-5.57684E-8	2.07479E-10	3.82707E-8	-2.04013E-7
ω	2.96664E-8	-8.72038E-8	-1.06355E-5	3.82707E-8	7.24509E-6	-3.88795E-5
M	-1.60635E-7	4.70878E-7	5.74332E-5	-2.04013E-7	-3.88795E-5	2.09944E-4

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

25.251

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

24 - 50*

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
[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

319

Unit

Source

[1]

Normalized RMS of residuals

Value

0.695709

Unit

Source

[1]

Astrometry Summary

First Observation
Last Observation
Total Optical Observations (Discarded)

Optical

Value

Unit

Source

First Observation

Value

2025-05-20.322167

Unit

Source

[2]

Last Observation

Value

2025-05-26.234975

Unit

Source

[2]

Total Optical Observations (Discarded)

Value

150 (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 2025KB1 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	1951-05-22 02:02	> 1 d	0.0293149	0.0067755	0.1479453
EARTH	1960-05-21 05:22	> 1 d	0.0252087	0.0056740	0.0519714
EARTH	1969-05-22 08:57	4.4	0.1314427	0.0123438	0.0506539
VENUS	1986-11-17 19:29	119.0	0.0023830	0.0017600	0.0008996
EARTH	2001-05-20 16:48	60.5	0.0279892	0.0263752	0.0005496
EARTH	2006-05-24 17:02	14.8	0.1641818	0.1608629	0.0011069
EARTH	2020-05-01 00:29	73.9	0.1747922	0.1735405	0.0004177
EARTH	2025-05-21 13:00	< 1 s	0.0193121	0.0192979	0.0000047
EARTH	2030-05-24 14:00	7.8	0.1666200	0.1650267	0.0005312
VENUS	2034-11-12 08:04	115.8	0.0040065	0.0003331	0.0013170
EARTH	2045-05-26 02:58	> 1 d	0.1867566	0.0449722	0.1733504
EARTH	2050-05-26 15:56	> 1 d	0.1126734	0.0361997	0.1568358
EARTH	2055-05-25 11:27	> 1 d	0.0507855	0.0297218	0.0868061
EARTH	2060-05-22 21:06	> 1 d	0.0286556	0.0281891	0.0029161
EARTH	2065-05-20 09:48	> 1 d	0.0445448	0.0295480	0.0400349
EARTH	2070-05-15 02:33	> 1 w	0.0892023	0.0438794	0.0946483
EARTH	2075-05-04 02:28	> 1 w	0.1542827	0.0863284	0.0971379
VENUS	2090-11-02 15:14	> 1 w	0.0448494	0.0031094	0.1535107
VENUS	2102-07-18 07:11	> 1 w	0.0388198	0.0022904	0.1342319
EARTH	2111-05-27 23:01	> 1 d	0.1024207	0.0365726	0.0863360
EARTH	2116-05-24 19:51	> 1 d	0.0353692	0.0299280	0.0314012
EARTH	2121-05-21 07:12	> 1 d	0.0457323	0.0316799	0.0325840
EARTH	2126-05-14 11:27	> 1 d	0.0998953	0.0489870	0.0239794

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Stationary Points

Ecc. an. ast.	Ecc. an. Earth	Distance in au	Classification
213.07149085	138.58304390	0.01662858	MINIMUM
56.06410844	357.26124467	0.24640982	MINIMUM
95.10903535	37.41957936	0.25331136	SADDLE
323.77089851	250.31295097	0.33646179	SADDLE
347.76877102	99.39285952	1.70831857	SADDLE
179.31262400	291.29992548	2.04827617	MAXIMUM

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MOID Plots

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

Level lines of the squared distance function

2025KB1

Date in UTC	MJD	σ	σ_imp	Distance ± Width in RE	Stretching in RE	IP	Impact energy	PS	TS
2068-05-19.689	76520.689	-4.697	0.000	0.83 ± 0.006	7.80E5	2.52E-11	9.92E-1	-10.71	0


Based on 150 optical observations (of which 1 are rejected as outliers) from 2025/05/20.322 to 2025/05/26.235.
Coordinates are given on the Target Plane.
Unit is one Earth radius, but impact cross section has radius between 1.68 and 1.68 Earth radii.
Coordinates for LOV = EQU scaled= 1 second= F.
Aegis software version= 5.0, Date of computation=20250805 130500.123 UTC.

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Download Impactor Table as: