Asteroids

2025EK4 help

Last update: 2026-03-08 13:30 UTC

Orbital Properties

Epoch

61200.0

MJD

Orbit type

Aten

Perihelion (q)

0.801

Aphelion (Q)

1.186

Eccentricity (e)

0.194

Inclination (i)

17.7

deg

Orbit period (P)

361.8

Earth MOID

0.00953

U parameter

1.1

Next Earth close approach

Date

2026-03-10

Nominal distance (from Earth center)

0.03787

5665470

Maximum Brightness

19.3

mag

Risk

Object is not in risk list

Physical Properties

Absolute Magnitude (H)

mag

Diameter

40 - 90*

Taxonomic type

Rotation period (T)

Discovery Information

Discovery Date

2025-03-15

Observatory

MAPS, San Pedro de Atacama

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

0.993719

1-sigma variation

1.685E-8

Unit

Eccentricity (e)

Value

0.193627

1-sigma variation

0.000002

Unit

Inclination (i)

Value

17.6793

1-sigma variation

0.0002

Unit

Long. of Ascending Node (Ω)

Value

350.6921

1-sigma variation

1.187E-5

Unit

Arg. of Perihelion (ω)

Value

75.7288

1-sigma variation

0.0001

Unit

Mean Anomaly (M)

Value

173.09206

1-sigma variation

0.00010

Unit

Perihelion distance

Value

0.801309

1-sigma variation

Unit

Aphelion distance

Value

1.186130

1-sigma variation

Unit

Asc. Node-Earth Sep.

Value

-0.093739

1-sigma variation

Unit

Desc. Node-Earth Sep.

Value

0.011148

1-sigma variation

Unit

MOID

Value

0.009532

1-sigma variation

Unit

Orbit Period

Value

361.8211

1-sigma variation

Unit

U parameter

Value

1.1

1-sigma variation

Unit

Covariance Matrix

	a	e	i	Ω	ω	M
a	2.83991E-16	-3.15916E-14	-2.81244E-12	1.30306E-13	1.79241E-12	1.53187E-12
e	-3.15916E-14	4.25969E-12	3.58566E-10	-2.06129E-11	-2.36634E-10	-2.14021E-10
i	-2.81244E-12	3.58566E-10	3.15702E-8	-1.64232E-9	-2.01936E-8	-1.76997E-8
Ω	1.30306E-13	-2.06129E-11	-1.64232E-9	1.40817E-10	1.12454E-9	1.03997E-9
ω	1.79241E-12	-2.36634E-10	-2.01936E-8	1.12454E-9	1.32405E-8	1.17839E-8
M	1.53187E-12	-2.14021E-10	-1.76997E-8	1.03997E-9	1.17839E-8	1.08962E-8

Date of computation: 2026-03-08 13:30 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

23.983

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

40 - 90*

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

362

Unit

Source

[1]

Unobserved

Value

Unit

Source

[1]

Normalized RMS of residuals

Value

0.524906

Unit

Source

[1]

Astrometry Summary

First Observation
Last Observation
Total Optical Observations (Discarded)

Optical

Value

Unit

Source

First Observation

Value

2025-03-10.207058

Unit

Source

[2]

Last Observation

Value

2026-03-07.120752

Unit

Source

[2]

Total Optical Observations (Discarded)

Value

50 (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

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 2025EK4 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	1950-09-25 06:54	1.4	0.1739342	0.1739225	0.0000039
EARTH	1951-09-16 05:16	1.1	0.1234046	0.1233952	0.0000031
EARTH	1952-09-07 22:46	< 1 min	0.0897551	0.0897515	0.0000012
EARTH	1953-09-01 19:24	< 1 min	0.0950903	0.0950814	0.0000030
EARTH	1954-08-27 07:13	< 1 min	0.1375741	0.1375605	0.0000046
EARTH	1955-08-22 04:34	< 1 min	0.1967745	0.1967595	0.0000050
EARTH	2023-03-15 09:36	< 1 s	0.1532077	0.1532072	0.0000002
EARTH	2024-03-12 08:50	< 1 s	0.0823031	0.0823028	0.0000001
EARTH	2025-03-10 20:36	< 1 s	0.0172296	0.0172292	0.0000001
EARTH	2026-03-10 03:16	< 1 min	0.0378713	0.0378708	0.0000002
EARTH	2027-03-09 23:58	< 1 min	0.0946563	0.0946554	0.0000003
EARTH	2028-03-10 01:25	< 1 min	0.1537000	0.1536987	0.0000004
EARTH	2033-09-27 08:30	1.1	0.1854684	0.1854519	0.0000055
EARTH	2034-09-18 22:38	< 1 min	0.1385040	0.1384883	0.0000052
EARTH	2035-09-12 01:52	< 1 min	0.0995916	0.0995793	0.0000041
EARTH	2036-09-05 07:25	< 1 min	0.0839964	0.0839930	0.0000011
EARTH	2037-08-31 04:16	< 1 min	0.1043034	0.1042966	0.0000023
EARTH	2038-08-26 10:35	< 1 min	0.1488483	0.1488362	0.0000040
EARTH	2115-03-16 15:50	< 1 min	0.1549331	0.1549214	0.0000039
EARTH	2116-03-13 19:04	< 1 min	0.0911690	0.0911576	0.0000038
EARTH	2117-03-12 08:27	< 1 min	0.0313886	0.0313782	0.0000034
EARTH	2118-03-11 11:36	< 1 min	0.0219442	0.0219379	0.0000021
EARTH	2119-03-11 01:37	< 1 min	0.0815773	0.0815768	0.0000002
EARTH	2120-03-10 19:18	< 1 min	0.1444190	0.1444126	0.0000021
EARTH	2125-09-26 09:26	3.2	0.1755397	0.1755018	0.0000126
EARTH	2126-09-17 21:34	3.2	0.1266131	0.1265760	0.0000124

Download as:

Stationary Points

Ecc. an. ast.	Ecc. an. Earth	Distance in au	Classification
92.21655916	64.53322519	0.00953247	MINIMUM
287.49347384	239.78654855	0.08286176	MINIMUM
8.67598418	332.94074834	0.32795100	SADDLE
190.97241840	150.36393464	0.37499972	SADDLE
359.90864370	142.00569235	1.79458362	SADDLE
172.81882367	314.60937115	2.15048026	MAXIMUM

Download:

MOID Plots

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