Asteroids

2018EB4 help

Last update: 2026-03-17 23:26 UTC

Orbital Properties

Epoch

61200.0

MJD

Orbit type

Apollo

Perihelion (q)

0.870

Aphelion (Q)

3.763

Eccentricity (e)

0.624

Inclination (i)

1.4

deg

Orbit period (P)

1287.8

Earth MOID

0.00263

U parameter

7.7

Next Earth close approach

Date

2078-03-10

Nominal distance (from Earth center)

0.02957

4423072

Maximum Brightness

20.3

mag

Risk

Object is not in risk list

Physical Properties

Absolute Magnitude (H)

25.5

mag

Diameter

21 - 50*

Taxonomic type

Rotation period (T)

Discovery Information

Discovery Date

2018-03-12

Observatory

Catalina Sky 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

2.316476

1-sigma variation

0.002575

Unit

Eccentricity (e)

Value

0.624413

1-sigma variation

0.000353

Unit

Inclination (i)

Value

1.3930

1-sigma variation

0.0005

Unit

Long. of Ascending Node (Ω)

Value

359.9003

1-sigma variation

0.3997

Unit

Arg. of Perihelion (ω)

Value

221.1577

1-sigma variation

0.3618

Unit

Mean Anomaly (M)

Value

108.00894

1-sigma variation

0.46362

Unit

Perihelion distance

Value

0.870038

1-sigma variation

Unit

Aphelion distance

Value

3.762915

1-sigma variation

Unit

Asc. Node-Earth Sep.

Value

1.659861

1-sigma variation

Unit

Desc. Node-Earth Sep.

Value

-0.033944

1-sigma variation

Unit

MOID

Value

0.002631

1-sigma variation

Unit

Orbit Period

Value

1287.7758

1-sigma variation

Unit

U parameter

Value

7.7

1-sigma variation

Unit

Covariance Matrix

	a	e	i	Ω	ω	M
a	6.62936E-6	9.08998E-7	-1.27262E-6	1.02907E-3	-9.31436E-4	-1.19371E-3
e	9.08998E-7	1.24639E-7	-1.74495E-7	1.41103E-4	-1.27716E-4	-1.63678E-4
i	-1.27262E-6	-1.74495E-7	2.45312E-7	-1.97553E-4	1.78812E-4	2.29153E-4
Ω	1.02907E-3	1.41103E-4	-1.97553E-4	1.59742E-1	-1.44586E-1	-1.85299E-1
ω	-9.31436E-4	-1.27716E-4	1.78812E-4	-1.44586E-1	1.30868E-1	1.67718E-1
M	-1.19371E-3	-1.63678E-4	2.29153E-4	-1.85299E-1	1.67718E-1	2.14944E-1

Date of computation: 2026-03-17 23:26 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

25.503

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

21 - 50*

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

2956

Unit

Source

[1]

Normalized RMS of residuals

Value

0.560922

Unit

Source

[1]

Astrometry Summary

First Observation
Last Observation
Total Optical Observations (Discarded)

Optical

Value

Unit

Source

First Observation

Value

2018-03-12.34928

Unit

Source

[2]

Last Observation

Value

2018-03-16.06002

Unit

Source

[2]

Total Optical Observations (Discarded)

Value

88 (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 2018EB4 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	1964-06-29 23:12	> 1 mo	0.1035218	0.0244739	4.0540286
EARTH	1993-03-13 10:51	> 1 d	0.0122572	0.0040872	0.0516873
EARTH	2018-03-16 05:59	< 1 s	0.0037352	0.0037336	0.0000005
EARTH	2025-06-24 23:23	> 1 d	0.0264134	0.0247309	0.0053938
EARTH	2078-03-10 21:10	> 1 mo	0.0295664	0.0019357	0.4221103
EARTH	2085-04-25 11:38	> 1 mo	0.1234683	0.0308914	0.2555669
EARTH	2092-07-01 04:32	> 1 mo	0.0850881	0.0229878	3.0387828
MARS	2109-09-17 23:14	> 1 mo	0.0451015	0.0198493	1.9156742

Download as:

Stationary Points

Ecc. an. ast.	Ecc. an. Earth	Distance in au	Classification
336.03190194	71.19458409	0.00272788	MINIMUM
26.08912490	171.05817901	0.02477491	MINIMUM
1.38148395	121.65330361	0.14008339	SADDLE
1.21825879	301.32810714	1.86224339	SADDLE
180.29027198	300.12542969	2.77122741	SADDLE
180.28324474	120.12600785	4.77243828	MAXIMUM

Download:

MOID Plots

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