Asteroids

2025EF4 help

Last update: 2025-03-14 12:42 UTC

Orbital Properties

Epoch

60800.0

MJD

Orbit type

Apollo

Perihelion (q)

0.996

Aphelion (Q)

1.546

Eccentricity (e)

0.217

Inclination (i)

8.9

deg

Orbit period (P)

523.4

Earth MOID

0.00199

U parameter

6.6

Next Earth close approach

Date

2025-03-15

Nominal distance (from Earth center)

0.00307

458670

Maximum Brightness

13.9

mag

Risk

Object is not in risk list

Object is in priority list

Physical Properties

Absolute Magnitude (H)

24.8

mag

Diameter

30 - 70*

Taxonomic type

Rotation period (T)

Discovery Information

Discovery Date

2025-03-11

Observatory

Santel Observatory, El Leoncito

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

1.271007

1-sigma variation

0.000123

Unit

Eccentricity (e)

Value

0.216538

1-sigma variation

0.000076

Unit

Inclination (i)

Value

8.9128

1-sigma variation

0.0030

Unit

Long. of Ascending Node (Ω)

Value

174.2037

1-sigma variation

0.0001

Unit

Arg. of Perihelion (ω)

Value

354.2594

1-sigma variation

0.0009

Unit

Mean Anomaly (M)

Value

38.66472

1-sigma variation

0.00533

Unit

Perihelion distance

Value

0.995786

1-sigma variation

Unit

Aphelion distance

Value

1.546228

1-sigma variation

Unit

Asc. Node-Earth Sep.

Value

0.001996

1-sigma variation

Unit

Desc. Node-Earth Sep.

Value

0.539308

1-sigma variation

Unit

MOID

Value

0.001995

1-sigma variation

Unit

Orbit Period

Value

523.3839

1-sigma variation

Unit

U parameter

Value

6.6

1-sigma variation

Unit

Covariance Matrix

	a	e	i	Ω	ω	M
a	1.51714E-8	9.32792E-9	3.75090E-7	1.11799E-8	-9.67219E-8	-6.56390E-7
e	9.32792E-9	5.73515E-9	2.30622E-7	6.87438E-9	-5.94793E-8	-4.03566E-7
i	3.75090E-7	2.30622E-7	9.28571E-6	2.79015E-7	-2.43285E-6	-1.62043E-5
Ω	1.11799E-8	6.87438E-9	2.79015E-7	8.93144E-9	-8.13971E-8	-4.77896E-7
ω	-9.67219E-8	-5.94793E-8	-2.43285E-6	-8.13971E-8	7.82550E-7	4.08866E-6
M	-6.56390E-7	-4.03566E-7	-1.62043E-5	-4.77896E-7	4.08866E-6	2.84543E-5

Date of computation: 2025-03-14 11:58 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

24.751

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

30 - 70*

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

0.4

Unit

Source

[1]

Normalized RMS of residuals

Value

0.3997

Unit

Source

[1]

Astrometry Summary

First Observation
Last Observation
Total Optical Observations (Discarded)

Optical

Value

Unit

Source

First Observation

Value

2025-03-11.05181

Unit

Source

[2]

Last Observation

Value

2025-03-14.13691

Unit

Source

[2]

Total Optical Observations (Discarded)

Value

42 (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 2025EF4 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	1954-04-03 18:02	> 1 mo	0.1186752	0.0231628	0.3020997
EARTH	1965-03-16 04:53	523.2	0.0056534	0.0020612	0.0016471
EARTH	1972-03-01 09:39	> 1 d	0.0686211	0.0243155	0.0151971
EARTH	2011-04-15 01:45	312.4	0.1983943	0.1890053	0.0031346
EARTH	2018-03-25 17:28	> 1 d	0.0552429	0.0358665	0.0064814
EARTH	2025-03-15 09:52	< 1 min	0.0030660	0.0030627	0.0000011
EARTH	2035-04-14 12:16	1010.0	0.1737891	0.1479930	0.0086555
EARTH	2058-02-10 15:05	> 1 d	0.1989060	0.1362497	0.0212639
EARTH	2068-03-09 00:29	> 1 d	0.0270465	0.0001241	0.0193339
EARTH	2078-02-23 19:33	> 1 w	0.1014388	0.0224797	0.1462359
EARTH	2115-04-14 05:39	> 1 w	0.1624621	0.0433907	0.2221159
EARTH	2125-03-25 21:40	> 1 w	0.0488519	0.0051961	0.1341252

Download as:

Stationary Points

Ecc. an. ast.	Ecc. an. Earth	Distance in au	Classification
4.59163847	71.06255815	0.00199485	MINIMUM
181.63007231	248.15220259	0.54030900	SADDLE
3.91552555	250.22549820	2.00168959	SADDLE
182.65506962	68.96157128	2.53982642	MAXIMUM

Download:

MOID Plots

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