Asteroids

2025EA4 help

Last update: 2025-09-10 00:30 UTC

Orbital Properties

Epoch

61000.0

MJD

Orbit type

Aten

Perihelion (q)

0.775

Aphelion (Q)

1.014

Eccentricity (e)

0.133

Inclination (i)

5.2

deg

Orbit period (P)

308.9

Earth MOID

0.00886

U parameter

6.3

Next Earth close approach

Date

2036-03-28

Nominal distance (from Earth center)

0.04637

6936381

Maximum Brightness

21.6

mag

Risk

Object is not in risk list

Physical Properties

Absolute Magnitude (H)

25.8

mag

Diameter

19 - 40*

Taxonomic type

Rotation period (T)

Discovery Information

Discovery Date

2025-03-10

Observatory

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

61000.0000

1-sigma variation

Unit

MJD

Semimajor Axis

Value

0.894296

1-sigma variation

0.000034

Unit

Eccentricity (e)

Value

0.133335

1-sigma variation

0.000051

Unit

Inclination (i)

Value

5.1706

1-sigma variation

0.0023

Unit

Long. of Ascending Node (Ω)

Value

166.5150

1-sigma variation

0.0010

Unit

Arg. of Perihelion (ω)

Value

201.1210

1-sigma variation

0.0030

Unit

Mean Anomaly (M)

Value

96.06280

1-sigma variation

0.01824

Unit

Perihelion distance

Value

0.775055

1-sigma variation

Unit

Aphelion distance

Value

1.013538

1-sigma variation

Unit

Asc. Node-Earth Sep.

Value

0.009819

1-sigma variation

Unit

Desc. Node-Earth Sep.

Value

-0.226634

1-sigma variation

Unit

MOID

Value

0.008860

1-sigma variation

Unit

Orbit Period

Value

308.9020

1-sigma variation

Unit

U parameter

Value

6.3

1-sigma variation

Unit

Covariance Matrix

	a	e	i	Ω	ω	M
a	1.17778E-9	-1.74682E-9	-7.98704E-8	-3.50869E-8	1.04317E-7	-6.25856E-7
e	-1.74682E-9	2.59082E-9	1.18467E-7	5.20452E-8	-1.54696E-7	9.28202E-7
i	-7.98704E-8	1.18467E-7	5.41818E-6	2.38090E-6	-7.06930E-6	4.24339E-5
Ω	-3.50869E-8	5.20452E-8	2.38090E-6	1.04655E-6	-3.10368E-6	1.86379E-5
ω	1.04317E-7	-1.54696E-7	-7.06930E-6	-3.10368E-6	9.25437E-6	-5.54573E-5
M	-6.25856E-7	9.28202E-7	4.24339E-5	1.86379E-5	-5.54573E-5	3.32614E-4

Date of computation: 2025-09-10 00:30 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

25.774

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

19 - 40*

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

188

Unit

Source

[1]

Normalized RMS of residuals

Value

0.545118

Unit

Source

[1]

Astrometry Summary

First Observation
Last Observation
Total Optical Observations (Discarded)

Optical

Value

Unit

Source

First Observation

Value

2025-03-10.425927

Unit

Source

[2]

Last Observation

Value

2025-03-22.900191

Unit

Source

[2]

Total Optical Observations (Discarded)

Value

69 (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

Close Approaches for 2025EA4 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	1957-02-26 23:32	> 1 w	0.0259579	0.0130741	0.0534623
EARTH	1963-04-24 01:59	345.6	0.1731839	0.0873996	0.0316247
EARTH	1974-02-21 02:20	> 1 d	0.0801763	0.0203806	0.0429719
EARTH	1974-07-11 01:21	> 1 mo	0.1738301	0.1511284	0.0145020
EARTH	1979-12-06 10:27	> 1 mo	0.1778023	0.1278844	0.0191291
EARTH	1980-04-19 08:57	> 1 d	0.1030127	0.0580961	0.0397238
EARTH	1997-03-14 16:33	> 1 d	0.0236288	0.0140445	0.0061387
EARTH	2008-02-20 01:04	58.9	0.1468752	0.1305927	0.0054388
EARTH	2008-07-28 02:37	> 1 d	0.1940773	0.1905850	0.0012225
EARTH	2013-11-21 15:05	> 1 d	0.1947760	0.1919877	0.0009433
EARTH	2014-04-22 22:01	108.3	0.1438234	0.1341328	0.0032614
EARTH	2025-03-13 14:36	< 1 min	0.0223861	0.0223589	0.0000091
EARTH	2036-03-28 18:17	> 1 d	0.0463668	0.0404009	0.0021085
EARTH	2047-04-22 23:28	50.4	0.1739038	0.1655986	0.0027785
EARTH	2052-02-19 03:16	22.3	0.1387536	0.1328586	0.0019668
EARTH	2052-07-24 11:50	> 1 d	0.1959248	0.1945502	0.0004648
VENUS	2056-12-04 17:27	17.3	0.0487314	0.0487136	0.0000060
EARTH	2063-02-22 15:38	247.5	0.0439280	0.0386629	0.0017697
EARTH	2063-06-26 03:12	> 1 d	0.1631128	0.1602601	0.0009645
EARTH	2074-02-20 12:05	142.8	0.0757048	0.0703463	0.0017907
EARTH	2074-07-09 08:43	> 1 d	0.1747365	0.1730997	0.0005540
EARTH	2090-12-16 04:51	> 1 d	0.1706731	0.1675181	0.0010522
EARTH	2091-04-17 23:23	409.4	0.0868674	0.0828167	0.0013721
EARTH	2102-03-22 21:29	241.1	0.0379023	0.0371547	0.0002514
EARTH	2112-12-04 12:12	> 1 d	0.1859336	0.1837614	0.0007266
EARTH	2113-04-22 02:59	108.6	0.1150945	0.1100287	0.0017074
EARTH	2118-02-21 16:52	69.2	0.1984872	0.1924960	0.0019974

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Stationary Points

Ecc. an. ast.	Ecc. an. Earth	Distance in au	Classification
152.74016136	60.67190577	0.00959908	MINIMUM
355.03312038	260.86512601	0.22829577	SADDLE
351.69453662	77.03960429	1.77204129	SADDLE
172.84677265	258.18805968	2.01571092	MAXIMUM

Download:

MOID Plots

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