Asteroids

2025EK4 help

Last update: 2025-04-29 10:01 UTC

Orbital Properties

Epoch

60800.0

MJD

Orbit type

Aten

Perihelion (q)

0.802

Aphelion (Q)

1.187

Eccentricity (e)

0.194

Inclination (i)

17.7

deg

Orbit period (P)

362.2

Earth MOID

0.00908

U parameter

6.9

Next Earth close approach

Date

2026-03-10

Nominal distance (from Earth center)

0.03761

5626957

Maximum Brightness

19.3

mag

Risk

Object is not in risk list

Object is in priority list

Physical Properties

Absolute Magnitude (H)

mag

Diameter

40 - 90*

Taxonomic type

Rotation period (T)

Discovery Information

Discovery Date

2025-03-15

Observatory

MAP, 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

60800.0000

1-sigma variation

Unit

MJD

Semimajor Axis

Value

0.994482

1-sigma variation

0.000111

Unit

Eccentricity (e)

Value

0.193721

1-sigma variation

0.000143

Unit

Inclination (i)

Value

17.6789

1-sigma variation

0.0158

Unit

Long. of Ascending Node (Ω)

Value

350.7169

1-sigma variation

0.0008

Unit

Arg. of Perihelion (ω)

Value

75.9613

1-sigma variation

0.0234

Unit

Mean Anomaly (M)

Value

135.17529

1-sigma variation

0.05004

Unit

Perihelion distance

Value

0.801829

1-sigma variation

Unit

Aphelion distance

Value

1.187134

1-sigma variation

Unit

Asc. Node-Earth Sep.

Value

-0.091543

1-sigma variation

Unit

Desc. Node-Earth Sep.

Value

0.010621

1-sigma variation

Unit

MOID

Value

0.009082

1-sigma variation

Unit

Orbit Period

Value

362.2376

1-sigma variation

Unit

U parameter

Value

6.9

1-sigma variation

Unit

Covariance Matrix

	a	e	i	Ω	ω	M
a	1.22179E-8	1.58260E-8	1.74124E-6	-8.72435E-8	2.58707E-6	-5.53118E-6
e	1.58260E-8	2.05250E-8	2.25753E-6	-1.13153E-7	3.34967E-6	-7.16608E-6
i	1.74124E-6	2.25753E-6	2.48328E-4	-1.24455E-5	3.68581E-4	-7.88398E-4
Ω	-8.72435E-8	-1.13153E-7	-1.24455E-5	6.23854E-7	-1.84653E-5	3.95045E-5
ω	2.58707E-6	3.34967E-6	3.68581E-4	-1.84653E-5	5.47872E-4	-1.17111E-3
M	-5.53118E-6	-7.16608E-6	-7.88398E-4	3.95045E-5	-1.17111E-3	2.50411E-3

Date of computation: 2025-04-10 09:29 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

24.014

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

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

Unit

Source

[1]

Unobserved

Value

Unit

Source

[1]

Normalized RMS of residuals

Value

0.493946

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

2025-03-18.06404

Unit

Source

[2]

Total Optical Observations (Discarded)

Value

38 (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

Close Approaches for 2025EK4 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	1950-09-22 18:41	> 1 w	0.1607882	0.1070515	0.0504127
EARTH	1951-09-14 05:38	> 1 w	0.1127626	0.0911693	0.0390214
EARTH	1952-09-06 07:32	> 1 d	0.0867604	0.0863352	0.0063586
EARTH	1953-08-31 08:57	> 1 d	0.1027957	0.0882898	0.0336501
EARTH	1954-08-25 24:00	> 1 d	0.1506334	0.0942140	0.0519778
EARTH	2023-03-15 09:12	85.3	0.1526849	0.1466159	0.0020232
EARTH	2024-03-12 08:39	40.0	0.0820379	0.0789582	0.0010269
EARTH	2025-03-10 20:36	< 1 min	0.0172337	0.0171882	0.0000152
EARTH	2026-03-10 03:21	17.8	0.0376139	0.0346311	0.0009974
EARTH	2027-03-09 23:55	12.5	0.0941801	0.0886503	0.0018443
EARTH	2028-03-10 00:51	104.3	0.1530344	0.1453062	0.0025774
EARTH	2033-09-27 15:18	> 1 d	0.1869046	0.1709056	0.0055106
EARTH	2034-09-19 04:41	> 1 d	0.1399524	0.1242887	0.0055727
EARTH	2035-09-12 07:25	1394.4	0.1006853	0.0905765	0.0042495
EARTH	2036-09-05 12:41	1314.8	0.0839343	0.0839153	0.0001358
EARTH	2037-08-31 09:31	1248.0	0.1028410	0.0898601	0.0055541
EARTH	2038-08-26 15:54	1162.9	0.1465683	0.1221391	0.0087449
EARTH	2115-03-17 04:30	> 1 d	0.1700272	0.0081113	0.0589679
EARTH	2116-03-14 06:09	> 1 d	0.1059452	0.0087118	0.0579056
EARTH	2117-03-12 17:11	> 1 d	0.0449672	0.0087406	0.0540645
EARTH	2118-03-11 16:19	1252.0	0.0132928	0.0087748	0.0327119
EARTH	2119-03-11 02:21	190.4	0.0794868	0.0113131	0.0240442
EARTH	2120-03-10 23:51	49.8	0.1502583	0.1383147	0.0039813
EARTH	2124-09-29 14:40	> 1 w	0.1930175	0.1236390	0.0781753
EARTH	2125-09-19 11:30	> 1 w	0.1376067	0.0978848	0.0854363

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Stationary Points

Ecc. an. ast.	Ecc. an. Earth	Distance in au	Classification
92.02873208	66.78245919	0.00908160	MINIMUM
287.45717283	242.16289297	0.08087164	MINIMUM
8.62244853	335.25559556	0.32766757	SADDLE
190.80417766	152.69381882	0.37574154	SADDLE
0.10618005	144.63102238	1.79501093	SADDLE
173.10746300	317.33142895	2.15097367	MAXIMUM

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MOID Plots

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