Asteroids

2018LE4 help

Last update: 2025-11-24 16:53 UTC

Orbital Properties

Epoch

61000.0

MJD

Orbit type

Apollo

Perihelion (q)

0.908

Aphelion (Q)

1.597

Eccentricity (e)

0.275

Inclination (i)

21.0

deg

Orbit period (P)

512.1

Earth MOID

0.01664

U parameter

0.4

Next Earth close approach

Date

2032-06-09

Nominal distance (from Earth center)

0.08931

13360502

Maximum Brightness

21.5

mag

Risk

Object is not in risk list

Physical Properties

Absolute Magnitude (H)

23.9

mag

Diameter

40 - 100*

Taxonomic type

Rotation period (T)

Discovery Information

Discovery Date

2018-06-11

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

61000.0000

1-sigma variation

Unit

MJD

Semimajor Axis

Value

1.252594

1-sigma variation

3.411E-9

Unit

Eccentricity (e)

Value

0.275339

1-sigma variation

0.000001

Unit

Inclination (i)

Value

20.9945

1-sigma variation

0.0001

Unit

Long. of Ascending Node (Ω)

Value

256.2699

1-sigma variation

1.819E-5

Unit

Arg. of Perihelion (ω)

Value

295.2684

1-sigma variation

0.0003

Unit

Mean Anomaly (M)

Value

154.91004

1-sigma variation

0.00010

Unit

Perihelion distance

Value

0.907706

1-sigma variation

Unit

Aphelion distance

Value

1.597482

1-sigma variation

Unit

Asc. Node-Earth Sep.

Value

0.019438

1-sigma variation

Unit

Desc. Node-Earth Sep.

Value

0.326637

1-sigma variation

Unit

MOID

Value

0.016639

1-sigma variation

Unit

Orbit Period

Value

512.0515

1-sigma variation

Unit

U parameter

Value

0.4

1-sigma variation

Unit

Covariance Matrix

	a	e	i	Ω	ω	M
a	1.16355E-17	-3.12451E-15	-2.87579E-13	-4.15830E-14	7.79832E-13	-2.66687E-13
e	-3.12451E-15	1.53583E-12	1.20541E-10	2.05950E-11	-3.70889E-10	1.21824E-10
i	-2.87579E-13	1.20541E-10	9.89090E-9	1.66804E-9	-2.93088E-8	9.67404E-9
Ω	-4.15830E-14	2.05950E-11	1.66804E-9	3.30820E-10	-4.97651E-9	1.59972E-9
ω	7.79832E-13	-3.70889E-10	-2.93088E-8	-4.97651E-9	8.96962E-8	-2.95128E-8
M	-2.66687E-13	1.21824E-10	9.67404E-9	1.59972E-9	-2.95128E-8	9.75646E-9

Date of computation: 2025-11-24 16:53 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

23.914

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 - 100*

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

2564

Unit

Source

[1]

Unobserved

Value

258

Unit

Source

[1]

Normalized RMS of residuals

Value

0.472092

Unit

Source

[1]

Astrometry Summary

First Observation
Last Observation
Total Optical Observations (Discarded)

Optical

Value

Unit

Source

First Observation

Value

2018-06-11.26554

Unit

Source

[2]

Last Observation

Value

2025-06-18.417449

Unit

Source

[2]

Total Optical Observations (Discarded)

Value

74 (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 100 points and a final date not exceeding 2080/07/22 14:12.

Close Approaches for 2018LE4 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	2004-06-14 12:51	< 1 min	0.1851786	0.1851768	0.0000006
EARTH	2011-06-11 00:37	< 1 s	0.0978335	0.0978326	0.0000003
EARTH	2018-06-07 15:45	< 1 min	0.0377797	0.0377793	0.0000001
EARTH	2025-06-07 04:15	< 1 min	0.0340058	0.0340055	0.0000001
EARTH	2032-06-09 21:02	< 1 min	0.0893094	0.0893086	0.0000003
EARTH	2039-06-14 20:41	< 1 min	0.1743693	0.1743676	0.0000005
EARTH	2105-05-28 12:56	< 1 min	0.1670639	0.1670550	0.0000030
EARTH	2112-06-01 06:53	< 1 min	0.1011909	0.1011832	0.0000025
EARTH	2119-06-04 19:19	< 1 min	0.0524841	0.0524798	0.0000015

Download as:

Stationary Points

Ecc. an. ast.	Ecc. an. Earth	Distance in au	Classification
49.93464526	153.29147791	0.01663877	MINIMUM
286.55906140	359.33171711	0.23885860	MINIMUM
341.65053286	65.08425732	0.35591961	SADDLE
169.63089844	264.22389930	0.73452421	SADDLE
358.64329261	268.74616909	1.88208215	SADDLE
186.85568212	97.80004625	2.56768148	MAXIMUM

Download:

MOID Plots

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