Asteroids

2025CK help

Last update: 2026-06-04 23:11 UTC

Orbital Properties

Epoch

61200.0

MJD

Orbit type

Apollo

Perihelion (q)

0.918

Aphelion (Q)

1.210

Eccentricity (e)

0.137

Inclination (i)

5.8

deg

Orbit period (P)

400.8

Earth MOID

0.01376

U parameter

6.5

Next Earth close approach

Date

2036-02-01

Nominal distance (from Earth center)

0.16342

24447374

Maximum Brightness

27.1

mag

Risk

Object is not in risk list

Physical Properties

Absolute Magnitude (H)

28.1

mag

Diameter

6 - 14*

Taxonomic type

Rotation period (T)

Discovery Information

Discovery Date

2025-02-02

Observatory

University of Arizona 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

1.063869

1-sigma variation

0.000065

Unit

Eccentricity (e)

Value

0.137336

1-sigma variation

0.000095

Unit

Inclination (i)

Value

5.7928

1-sigma variation

0.0040

Unit

Long. of Ascending Node (Ω)

Value

133.0655

1-sigma variation

0.0005

Unit

Arg. of Perihelion (ω)

Value

75.2389

1-sigma variation

0.0015

Unit

Mean Anomaly (M)

Value

21.45838

1-sigma variation

0.03263

Unit

Perihelion distance

Value

0.917762

1-sigma variation

Unit

Aphelion distance

Value

1.209977

1-sigma variation

Unit

Asc. Node-Earth Sep.

Value

0.023048

1-sigma variation

Unit

Desc. Node-Earth Sep.

Value

0.066896

1-sigma variation

Unit

MOID

Value

0.013755

1-sigma variation

Unit

Orbit Period

Value

400.8030

1-sigma variation

Unit

U parameter

Value

6.5

1-sigma variation

Unit

Covariance Matrix

	a	e	i	Ω	ω	M
a	4.27273E-9	6.24144E-9	2.60646E-7	3.34233E-8	9.41432E-8	-2.13299E-6
e	6.24144E-9	9.11817E-9	3.80715E-7	4.88189E-8	1.37766E-7	-3.11591E-6
i	2.60646E-7	3.80715E-7	1.59082E-5	2.04013E-6	5.74086E-6	-1.30119E-4
Ω	3.34233E-8	4.88189E-8	2.04013E-6	2.61684E-7	7.35865E-7	-1.66854E-5
ω	9.41432E-8	1.37766E-7	5.74086E-6	7.35865E-7	2.14301E-6	-4.70333E-5
M	-2.13299E-6	-3.11591E-6	-1.30119E-4	-1.66854E-5	-4.70333E-5	1.06483E-3

Date of computation: 2026-06-04 23:11 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

28.13

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

6 - 14*

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

527

Unit

Source

[1]

Normalized RMS of residuals

Value

0.518237

Unit

Source

[1]

Astrometry Summary

First Observation
Last Observation
Total Optical Observations (Discarded)

Optical

Value

Unit

Source

First Observation

Value

2025-02-02.285577

Unit

Source

[2]

Last Observation

Value

2025-02-07.287545

Unit

Source

[2]

Total Optical Observations (Discarded)

Value

43 (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

Filters

Initial Date: *

Final Date: *

Normalised Only accepted

Max residual (arcsec):

* - these fields are required

Plot

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 2025CK 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	1957-07-26 12:21	> 1 mo	0.0924267	0.0441275	0.1501390
EARTH	1969-07-20 07:48	> 1 d	0.0580280	0.0377163	0.1326582
EARTH	1980-02-10 13:20	> 1 d	0.0258244	0.0130251	0.0416575
EARTH	1991-02-02 18:23	> 1 d	0.1307993	0.0103094	0.0547714
EARTH	1992-07-22 12:02	> 1 d	0.1533549	0.0376749	0.0490250
EARTH	2003-07-19 02:56	44.8	0.0401178	0.0386463	0.0025856
EARTH	2014-01-10 01:07	> 1 d	0.1546714	0.1411664	0.0045634
EARTH	2014-04-18 01:04	> 1 d	0.1290190	0.1257031	0.0011250
EARTH	2014-08-20 12:48	> 1 d	0.1545011	0.1426991	0.0040173
EARTH	2025-02-08 10:29	< 1 min	0.0139281	0.0139010	0.0000090
EARTH	2036-02-01 14:06	287.4	0.1634206	0.1443114	0.0063716
EARTH	2037-07-21 15:21	279.7	0.1189269	0.1008316	0.0060871
EARTH	2048-07-18 05:55	118.9	0.0461312	0.0376870	0.0040292
EARTH	2059-03-16 10:26	> 1 w	0.1103707	0.0783537	0.0110949
EARTH	2059-09-03 04:39	> 1 w	0.1819057	0.1597214	0.0077282
EARTH	2070-02-05 19:50	1020.9	0.0527390	0.0145069	0.0149403
EARTH	2082-07-23 00:51	> 1 d	0.0842486	0.0412914	0.0334090
EARTH	2093-02-04 01:30	> 1 d	0.0793026	0.0125506	0.0631126
EARTH	2094-07-24 16:46	> 1 d	0.1716968	0.0345955	0.0530892
EARTH	2105-03-14 11:16	> 1 w	0.1094625	0.0607634	0.0175314
EARTH	2105-09-06 10:59	> 1 w	0.1846872	0.1528746	0.0116460
EARTH	2117-07-19 20:25	1387.8	0.0353603	0.0352911	0.0057533

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Stationary Points

Ecc. an. ast.	Ecc. an. Earth	Distance in au	Classification
298.05211791	37.23538241	0.01331589	MINIMUM
79.77276841	194.98712441	0.03658219	MINIMUM
10.35691133	117.92234847	0.13175968	SADDLE
187.75302387	294.47944436	0.24123988	SADDLE
7.33511382	294.42579839	1.90987560	SADDLE
185.20584741	112.27083829	2.21374959	MAXIMUM

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MOID Plots

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